Tropical trees are dying at faster rates than ever before. While deforestation continues to be a major issue, even untouched forests are seeing increased rates of tree death. 



Scientists have long pointed to drought, extreme heat, and wildfires as key contributing factors to tropical tree mortality. But now, they are highlighting another powerful and often-overlooked force: thunderstorms.



Unlike the more familiar hurricanes and <a href="https://www.earth.com/news/are-bomb-cyclones-increasing-due-to-climate-change/">cyclones</a>, these storms are short but intense. Their high winds and lightning can be devastating to trees.



According to a recent study from researchers at the <a href="https://www.caryinstitute.org/" target="_blank" rel="noreferrer noopener">Cary Institute of Ecosystem Studies</a>, these storms are becoming more frequent due to climate change - and they’re causing serious harm to tropical forests.



<h2 class="wp-block-heading" id="h-the-climate-cost-of-tropical-tree-death">The climate cost of tropical tree death</h2>



“<a href="https://www.earth.com/news/tropical-forests-are-struggling-to-keep-pace-with-climate-change/">Tropical forests</a> have massive effects on global climate. They're like the <a href="https://www.earth.com/news/the-amazon-rainforest-and-the-looming-threat-of-drought/">lungs of the Earth</a>, and we're seeing trees in them dying at higher rates than in the past, and the composition of forests is changing, too,” said Evan Gora, a forest ecologist at&nbsp;Cary Institute of Ecosystem Studies. 



“That could be really problematic for the future of not just tropical forests, but for the planet.”



While storms might seem like fleeting events, their impact on tropical forests can be lasting. These powerful bursts of wind and lightning can injure or topple even the largest trees, disrupting forest structure and biodiversity in seconds.



“Being in the forest during a tropical storm is unforgettable,” said study co-author Vanessa Rubio. “As the storm quickly builds, the sky darkens, humidity changes drastically, and strong winds shake the trees. 



"Then, thunder and lightning come. Leaves and branches fall to the ground, rain pours down, and your instinct is to get back to the field station as quickly as possible.”



<h2 class="wp-block-heading" id="h-a-silent-driver-of-tree-death">A silent driver of tree death</h2>



<a href="https://www.earth.com/news/thunderstorms-are-becoming-more-intense-due-to-climate-change/">Thunderstorms</a> haven’t been given the same attention as other climate-related threats. But that’s starting to change. The team re-examined data from earlier studies on tropical tree death and forest carbon levels. They found that storms are just as significant - if not more so - than <a href="https://www.earth.com/news/global-drought-crisis-un-warns-of-unprecedented-emergency/">drought</a> or heat.



“We were surprised to find that storms may be the largest single factor causing tree death in these forests, and they’re largely overlooked by research into carbon storage in the tropics,” said Gora. 



“Our estimates suggest that storms are responsible for 30 to 60% of tree mortality in the past, and that number must be increasing as storm activity increases by 5 to 25% each decade.”



When the researchers added storms to the largest plot-based study on tropical forest carbon, the picture changed dramatically. The previous data showed a sharp drop in carbon when temperatures rose above a certain point. But adding storms made that link disappear.



“But when you add storms, that relationship goes away,” Gora said. “It basically shows that you have to include storms, or you might not get the answers right.”



<h2 class="wp-block-heading" id="h-double-trouble-for-tropical-trees">Double trouble for tropical trees</h2>



The team found that storms and drought often hit the same forests. The southern <a href="https://www.earth.com/news/tree-rings-show-amazon-rainfall-is-getting-more-extreme/">Amazon</a>, for instance, experiences both frequent storms and severe water stress. These combined threats are reshaping the region’s ecology.



“During my studies on threats to tropical forests, my professors, our textbooks, and even overall climate policy never mentioned small, convective storms as a potential source of forest mortality,” said study co-author Ian McGregor.



“I don't remember seeing them in global climate models used to inform climate policy. Given our findings, however, it's clear we need a more thorough understanding of these storms to have more accurate climate models, and thus more effective policy,” he added.



So why have storms flown under the radar until now? Part of the reason is that heat and drought are easier to measure. Tools like weather stations and long-term satellite tracking make it simpler to monitor those threats. 



But storms are different. They strike quickly and cause scattered damage. Satellites often miss the evidence of tropical tree deaths, and it’s nearly impossible for researchers to check vast forests manually after every storm.



<h2 class="wp-block-heading" id="h-tracking-trees-from-sky-to-soil">Tracking trees from sky to soil</h2>



To address these challenges, the team launched the Gigante project, co-led by the University of Birmingham. It uses a combination of lightning-tracking systems, drones, and field experts to monitor large areas of tropical forest. 



This enables scientists to pinpoint the location and extent of tree death, when the damage occurs, and which species are most at risk.



“If we make decisions about which species to plant or conserve based on an incorrect understanding of what's actually killing these trees and which species are most vulnerable, those forests won’t reach their full potential,” said Gora. 



Mature trees are especially vulnerable to storm damage. Without clearer insight, we might not realize our reforestation choices were flawed until decades later.



“However, if we can build a more holistic picture of what’s driving forest change, we can be a lot more confident in guiding forest management practices for long-term sustainability," noted Gora.



Understanding why tropical trees are dying isn’t just a scientific concern - it’s a climate priority with global consequences.



The study is to be <a href="https://www.caryinstitute.org/news-insights/press-release/thunderstorms-are-major-driver-tree-death-tropical-forests">published</a> in a perspective article in the journal Ecology Letters.



-----



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Tropical tree deaths are increasing, even in untouched forests

Tropical trees are dying at faster rates than ever before. While deforestation continues to be a major issue, even untouched forests are seeing increased rates of tree death. Scientists have long pointed to drought, extreme heat, and wildfires as key contributing factors to tropical tree mortality. But now, they are highlighting another powerful and often-overlooked force: thunderstorms. Unlike the more familiar hurricanes and cyclones, these storms are short but intense. Their high winds and lightning can be devastating to trees. According to a recent study from researchers...

When Christa Savva returned to the Sandy Shoes Beach Resort a day after Hurricane Matthew brushed by Melbourne Beach, Florida, she looked at the beach in front of the pink-flamingo-colored hotel and noticed half the sand dunes had disappeared.
Savva guesses three-quarters of the missing dunes washed into the ocean and the remaining quarter scattered onto the resort's beachfront property, which was undamaged by the hurricane.
"I was like, 'Oh, my goodness!'" Savva, a property manager for the Space-Age-era hotel, said Sunday. "It's crazy to have the dunes gone and all you see is empty space."
The sand dunes on Florida's beaches are the equivalent of tourism gold, and its disappearance over time threatens the state's No. 1 industry. While Hurricane Matthew didn't ravage Florida's coast as a series of storms did a dozen years ago, it collapsed dunes, washing away sand that protected buildings and roads during storms, and will likely require the spending of millions of dollars on beach restoration projects.
In Jacksonville Beach, the top of the dunes collapsed onto the lower part of the dunes, creating 10-foot high cliffs of sand, rather than the usual gentle slopes of the dunes.
Federal, state and local officials respond to beach erosion by depositing new sand in areas where it has disappeared, and the sand dunes act as barriers to infrastructure. Before these projects took off three decades ago, sea walls were often the only thing that stood between water, winds and buildings during storms.
"The good news is a lot of people don't realize our beaches are engineered. It looks natural, but we construct the sand so it's sacrificed during hurricanes and protects roads and structures and potentially human lives," said Jackie Keiser, a Jacksonville-area official with the U.S. Army Corps of Engineers.
While a statewide evaluation of beach erosion has yet to be completed, individual Atlantic-coast counties from south of the Space Coast up to the Georgia border were assessing the lost sand.
A $13.5 million project to replenish Jacksonville-area beaches with 650,000 thousand cubic yards of sand over seven miles was underway before Hurricane Matthew. Keiser said she is certain that same amount of sand was lost from the hurricane and the amount of sand needed for the project will likely double.
Virginia Barker, the natural resources director for Brevard County, the area of Florida often referred to as the Space Coast, said the erosion from Hurricane Matthew appears to be more in the category of Hurricane Sandy in 2012 than a devastating series of hurricanes of 2004 and 2005. After Sandy, 2.4 million cubic yards of sand were needed to replenish 14 miles of Brevard County's shoreline. The replenishment was far smaller than what was required after Hurricane Frances and Hurricane Jeanne made landfall just south of the Space Coast a dozen years ago.
"This is world-famous Cocoa Beach. People come here for the sandy experience," Barker said. "It's tremendously important to our economy. The alternative is to allow erosion and let the sea go up and there will be no sandy beach."
In Georgia, it's too early to tell the extent of beach erosion, but water did get past huge boulders placed along the shore to buffer properties and stop erosion, said Megan Desrosiers, CEO of One Hundred Miles, a Georgia coastal advocacy group.
"The thing about Georgia is, we haven't had a storm like this since the 1880s so it's hard to know how to prepare when no one remembers the last time there was a storm like this," Desrosiers said. "We don't have experience with this type of storm on the Georgia coast, but Matthew was a perfect example of what we will see more of in the future."
Before Hurricane Matthew, more than half of Florida's 663 miles of beaches were considered critically eroded by the state Department of Environmental Protection. The agency defines "critical erosion" as the disappearance of beach or dune to a degree that it affects the environment, development or recreational activities. About half of Florida's 411 miles of beaches deemed to have "critical erosion" are part of a beach replenishment program.
Before the storm, Brevard County had 41 miles of critical erosion, the area around Daytona Beach had almost 20 miles of beach erosion, the area around St. Augustine had almost 14 miles of critical erosion and the area around Jacksonville had more than 10 miles.
In Melbourne Beach, now that half of the dunes are gone in front of the Sandy Shoes, the high tide can lap up to the steps that lead to the hotel's wooden deck overlooking the beach.
"There's still a beach, and everything ... but it's just a lot flatter," Savva said. "High tide is something you're going to have to watch out for now."
---
Follow Mike Schneider on Twitter: <a href="http://twitter.com/mikeschneiderap">http://twitter.com/mikeschneiderap</a> . His work can be found at <a href="http://bigstory.ap.org/content/Mike-Schneider">http://bigstory.ap.org/content/Mike-Schneider</a> .
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Hurricane Matthew destroys protective sand dunes along Florida coast

When Christa Savva returned to the Sandy Shoes Beach Resort...

<div>
<div class="img-wrapper">Amid efforts to restore native oyster populations on the West Coast, how are oysters expected to fair under climate change in the decades and centuries to come? Not too badly, according to a study from the University of California, Davis. But there's a big "if" involved.</div>
In the study, published Oct. 10 in the journal Functional Ecology, researchers investigated oysters in the lab and in oyster beds at California's Tomales Bay and San Francisco Bay. They found that certain components of climate change may actually benefit oysters in California in the long term, provided they have enough food, because they tend to grow faster at warmer temperatures. Good news? Not so fast.

Meet oyster drills, two species of predatory snails introduced to California from the East Coast and Asia. While oysters are more tolerant of extreme temperatures and low salinity, such as can occur during floods, warming over the next few decades first benefits the oyster drills, increasing the rate at which they eat the oysters.

Oyster Drills 'The Worst Way To Go'

"To me, it's the worst way to go," said lead author Brian Cheng, a doctoral candidate at UC Davis Bodega Marine Laboratory at the time of the study and currently a postdoctoral fellow at the Smithsonian Environmental Research Center. "Imagine you're an oyster. You have a suit of armor you wear and that you cannot move. Imagine there was something that could crawl onto you and begin blasting away on your shell of armor. Imagine they could secrete acid and use a file-like tongue to bore tiny little holes into the shell. Then they insert their tongue and tear away bits of flesh, eating you alive. Once the hole is made, the oyster is basically done."

The silver lining is that oyster drills are relatively easy to find, identify and remove. Cheng said this makes them a good candidate for eradication.

The Last Native Oyster

Oysters are an iconic California seafood, and while the Olympia oyster is the only native oyster on the West Coast, it is no longer fished in California. Most oysters slurped down by consumers are farmed Pacific oysters native to Asia.

But wild oysters hold benefits beyond the gustatory: Their complex shell formations harbor other animals and plants, serving as habitat. Researchers are also investigating how they may help buffer the effects of sea level rise, contributing to a "living shoreline" that reduces rates of erosion.

In addition to holding management implications for native oyster populations, the study is also relevant for oyster farms, though they were not the focus of the research. Oyster farmers are well aware of oyster drill issues, Cheng said, but the study points out that the drill problem is expected to get worse before it gets better, and that management will be key to the survival of both oysters and oyster farms.

"Oysters are expected to do better if provided with unlimited resources, but we don't know if that will be the case in the wild under climate change," Cheng said. "So while there's evidence they could do better, by no means is it a slam dunk. Other aspects of climate change, such as ocean acidification, may continue to be detrimental to oysters."
###
The study was funded by the National Estuarine Research Reserve, National Park Service, UC Davis Bodega Marine Laboratory, and National Science Foundation.

</div>

Native oysters may thrive in climate change

Amid efforts to restore native oyster populations on the West...

<div>While current efforts to curtail agricultural runoff will improve the health of Lake Erie, much more work will be needed to protect the streams that feed the lake, new research shows.</div>
A study of the western Lake Erie watershed found that increased conservation efforts will be needed on most of the farms in the watershed in order to protect arterial streams in Ohio, Michigan and Indiana.

The project, led by researchers at The Ohio State University and The Nature Conservancy, used computer modeling to get a handle on the impact of various conservation efforts in the western Lake Erie watershed. The area includes about 5.5 million acres of cropland, making it the most intensely farmed watershed feeding into the Great Lakes.

In light of harmful algal blooms, conservationists, scientists and farmers are looking for ways to maintain robust agricultural production without causing damage to the surrounding ecosystem, said Stuart Ludsin, an associate professor of evolution, ecology and organismal biology and co-director of Ohio State's Aquatic Ecology Laboratory.

The bulk of that work has focused on reducing phosphorous in western Lake Erie by 40 percent. While that's an important goal, it doesn't address the harms from sediment and nitrogen runoff, Ludsin said. Nor does it focus on the health of streams throughout the watershed - waters that supply drinking water, provide habitat for fish and serve as a playground for anglers, kayakers and others, he said.

"Until our study, nobody has taken a hard look at how agricultural conservation practices aimed at protecting Lake Erie could influence the health of streams in the watershed. We're asking what happens to water quality and fish communities if we implement conservation measures," Ludsin said.

"It's important to not just focus on the lake, but to consider the arteries that feed it. Our streams are as degraded as the lake."

The study shows that both the streams and the lake will benefit if appropriate conservation efforts are implemented, he said. Conservation efforts include erosion control and nutrient management, including being selective about how much fertilizer is used and when it is applied.

The report includes predictions about the effects of a variety of conservation scenarios to give stakeholders information on which to base plans going forward, he said.

"Our models tell us what sort of difference it would make to streams if we reduced the amount of nutrients and sediments in agricultural runoff and leaching by 20, 40, or 60 percent," Ludsin said.

In embarking on this work, Ohio State and partners including The Nature Conservancy, the U.S. Department of Agriculture, Ohio Sea Grant and Texas A&amp;M University aimed to provide information that could optimize efforts to protect waters and the species that live within them from runoff, while maintaining the profitability of farms.

They also sought to determine what kind of financial investment will be necessary to achieve meaningful environmental benefits, both under current environmental conditions and taking into account the pressure of continued climate change.

The results highlight the role various farming practices could have in improving water quality in streams and in Lake Erie. To view the full report, go to <a href="http://www.lakeerieceap.com/" target="_blank">http://www.lakeerieceap.com</a>.

Agricultural runoff threatens fish in the majority of the western Lake Erie watershed, Ludsin said.

Analysis of state monitoring data has shown that current conservation efforts have improved fish community health, but more work is needed to control erosion and fertilizer runoff into streams, said Conor Keitzer, a former Ohio State postdoctoral fellow who is now an assistant professor at Tusculum College in Tennessee.

Through computer modeling, researchers found that stream health could improve with a modest increase in conservation efforts at farms in about 8 percent of the watershed. "But there's going to still be a huge part of the watershed where water quality is a concern," Keitzer said.

Nearly half of the farmland in the watershed would need improved runoff controls for widespread benefit for the fish that live in the streams, the analysis found. The research team used available observational data from the streams and fish populations to create a watershed-wide model to estimate how water quality impacts fish populations.

"We can make a big difference, but it's going to take a lot of work and a lot of cooperation," said Keitzer.

Erosion control and nutrient management in high- and moderate-need acres identified in the report could mean cleaner water and healthier fish communities in about half the streams in the watershed, they found.

This assessment points to the need to look not only at phosphorous, but at nitrogen and sediment in streams, the researchers said. Each of the three threatens fish in those waters.

Based on established thresholds for North American streams, the researchers found that a majority of streams in the watershed had phosphorous and nitrogen concentrations that could lead to algal blooms, which compromise drinking water and kill fish. Almost half of the streams had sediment concentrations that could harm fish.

"Results of our project clearly show that we can achieve significant improvements in both the streams and the lake, but it is going to take a lot of work," said Scott Sowa, director of science at The Nature Conservancy in Michigan.

"It also shows that we can't just focus on a single problem or stressor, like phosphorous. We are dealing with a multifaceted problem that will require a variety of practices and innovative collaborative solutions," he said.

The researchers estimated it could cost nearly $150 million annually to treat farm acres deemed "high and moderate needs" based on their predicted contribution of nutrients and sediments to surface waters. Keitzer stressed that the figure was a rough estimate, but one that illustrates that large investments are needed.

"Continued interaction among agencies and stakeholders regarding appropriate management and conservation targets in relation to monetary costs seems prudent," the researchers wrote in the report.

They also pointed out that farms aren't the sole contributor to problems in the lake and the watershed. Municipal waste systems, rural septic systems and point sources also contribute.

"I think people forget the importance of these streams, to both fish and people. This project will help us identify win-win solutions that benefit Lake Erie and the thousands of stream miles in its watershed," Keitzer said.
###
The research was supported by the U.S. Department of Agriculture's Natural Resources Conservation Service.

&nbsp;

Protecting Lake Erie from agricultural runoff

While current efforts to curtail agricultural runoff will improve the...

Washington lawmakers have tried and failed in recent years to make polluters pay for their carbon emissions to fight climate change. Now, voters will get to decide.
An initiative on the November ballot asks voters whether the state should impose the nation's first direct carbon tax on the burning of fossil fuels such as coal and gasoline.
Sponsors say residents have a moral responsibility to curb greenhouse gas emissions, and a carbon tax is the best way to do it. The tax encourages businesses to conserve or switch to clean energy by making fossil fuels more expensive, and it makes the tax system fairer by using the revenues to reduce other taxes, they say.
Businesses say the tax will drive up fuel and energy costs and put Washington companies at a competitive disadvantage.
And in a move that has bewildered some, major environmental and other groups - including those that backed Gov. Jay Inslee's proposal last year to cap emissions and make carbon polluters pay - oppose the initiative. They say it takes the wrong approach.
Yoram Bauman, an economist who founded Carbon Washington, the grassroots group that gathered more than 350,000 signatures to qualify Initiative 732, defended it as great climate and tax policy.
"It does almost everything right for Washington," he said.
Audubon Washington supports it.
"Our members came down on the side of urgency. We don't have time to wait," said Gail Gatton, the group's executive director. "Climate change is happening, and this is our best available option right now to protect birds."
But the Sierra Club, Washington Environmental Council and the advocacy group Front and Centered say the initiative is the wrong carbon-pricing approach and will hurt the state's revenues. Whereas Inslee's pollution fee would have raised money for education, transportation, clean energy and programs to help disadvantaged communities affected by climate change, Initiative 732 provides no such investments, critics say.
"It's not a path that makes sense for our communities," said Rich Stolz, executive director of OneAmerica, which works on social justice issues. Stolz said the initiative ignores climate justice and lacks input from communities of color.
Stolz's group is part of a coalition that worked on an alternative carbon-pricing measure. Last-minute talks between that coalition and I-732 supporters to collaborate on one ballot measure fizzled last year.
The initiative is designed to be revenue neutral, meaning the tax revenue increase from fossil fuels would be mostly offset by decreases in other taxes. In this case, revenues would be returned to people and businesses by cutting the state sales tax by one point, virtually eliminating business taxes for manufacturers and providing rebates for working families, sponsors say.
A state analysis, however, estimates the measure could cost the state about $800 million in lost revenues over the first six fiscal years. Initiative sponsors dispute the state's analysis, saying it double-counted the rebates in the first year.
The carbon tax is modeled after one in the nearby Canadian province of British Columbia. California has a cap-and-trade program, which limits emissions and allows carbon polluters to buy and trade pollution credits. If approved, Washington's carbon tax starts at $15 a ton of carbon emissions in July, goes up to $25 the next year and incrementally increases afterward.
The Washington State Tree Fruit Association, which represents growers, packers and marketers, is among those opposed.
It takes a lot of fuel to grow and transport produce, and the tax will be paid by those in the state, not competitors outside it, said Jon Devaney, the group's president.
"Raising food prices in Washington state will make us less competitive compared to others," he said.
Initiative sponsors say a $25 carbon tax would raise the price of gasoline by about 25 cents per gallon and the price of coal-fired electricity by about 2.5 cents per kilowatt-hour. They say power plants and fuel suppliers likely will pass those costs on to consumers, but that consumers will see price reductions in other things they buy because the sales tax is cut. The tax wouldn't apply to electricity from renewables like hydro, wind or solar power.
The campaign has raised $1.2 million from nearly 1,200 unique donors; more than half of those total contributions are under $200.
The No on 732 campaign sponsored by the Association of Washington Business has raised $300,000 to oppose the tax.
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Washington state will vote on America's first carbon tax in November

Washington lawmakers have tried and failed in recent years to...

<div>
<div class="img-wrapper">Cheap shale gas produced by fracking has driven the decline in coal production in the United States during the last decade, researchers at the Great Lakes Energy Institute at Case Western Reserve University have found.</div>
Power plants, which use 93 percent of the coal produced nationally, have been operating under the same EPA regulations signed into law by President George H.W. Bush in 1990. Proposed new rules since then have all been challenged in court and not implemented until June 2016, when the EPA's restrictions on mercury and other toxic emissions were approved by the U.S. Supreme Court.

Consumption of coal continued to grow under those 1990-era EPA rules until 2008, and then went into steady decline, dropping by 23 percent from 2008 thru 2015.

The data show the drop in those years to be correlated with the shale revolution, as natural gas production increased by a factor of more than 10 and its price dropped in half, the researchers say. And, due to the continuing--and in some cases accelerating--technological and economic advantages of gas over coal, the decline in coal is expected to continue at least decades into the future.

Their study is published in The Electricity Journal.

"Some people attribute the decline in coal-generated electricity to the EPA's air-quality rules, even calling it 'Obama's war on coal,'" said Mingguo Hong, associate professor of electrical engineering and computer science at Case Western Reserve and co-author of the study. "While we can't say that the EPA rules have no impact--as, for example, discouraging the building of new coal power plants because of the expectation that tougher air-quality rules will clear the courts--the data say the EPA rules have not been the driving force."

Hong, co-director of the Electricity Systems Research Lab at Case Western Reserve, and Walter Culver, a founding member of the Great Lakes Energy Institute Advisory Board at the university, say the data show that shale-gas competition is what's been hurting coal as of today. They expect that, as wind and solar sources of electricity continue to improve, they will be tough competitors to coal in the not-distant future.

The authors examined data available from the U.S. Energy Information Administration, academia, specialized energy consultants, and Wall Street analysts and publically available information of the electric utilities and gas industry--in some cases down to the profit and loss statements.

"If you're a power plant operator and you see gas supply is continuing to increase and natural gas can do the job cheaper--by a lot--the decision to switch from coal is pretty easy," Culver said.

The long-term outlook

"As we look toward the future, we see no natural mechanisms that will permit coal to recover," Culver said.

Gas supply continues to grow. Starting in 2009, gas production each year has exceeded U.S. Energy Information Administration (EIA) annual projections. And the proved gas reserves are outpacing production exponentially, the researchers note. Lastly, pipelines out of Appalachia--where the cheapest and most abundant shale gas is found--are expected next year to increase access to gas in that region by 55 percent above recent production.

There is a valid concern that the supply of natural gas will be limited by a recent debilitating drop in prices that has arisen from over-supply, Culver said. In fact, one driller per month has gone bankrupt in 2015 and early 2016.

But after reviewing the profit-and-loss statements of gas drillers, the researchers believe that a point of price stability exists where both the drillers can be profitable enough to keep drilling and the price to power plants--particularly for gas from the Marcellus and Utica shale deposits in Appalachia--will still be far lower than coal.

Some analysts suggest that exports of liquefied natural gas (LNG) will drive down the domestic supply and raise prices. But Hong and Culver say shipping costs, to Asian markets in particular and well-positioned regional competitors, are likely to prevent U.S. LNG from competing easily internationally. That would leave a strong supply here at attractive prices.

Beyond gas price, state regulations and generator technologies have been and will continue to be factors in the loss of coal production, they conclude.

Since 2010, the cost of utility-scale solar power has declined 68 percent and onshore wind 51 percent, making them close to, or already competitive with coal, the researchers say.

Policies in three-quarters of America's states encourage the addition of wind and solar as replacements for coal. As costs have dropped, some states are pushing a faster switch to those renewables.

Because wind and solar fail to provide constant power, fill-in energy sources are needed. Until large-scale batteries or other electricity-storage technologies become more practical, gas is the logical choice over coal to augment the grid, Culver says. Gas plants can be fired up and turned down faster than coal plants, thus lowering costs to consumers and producing less pollution.

Forthcoming EPA air-quality regulations may further disadvantage coal, Hong and Culver say. Burning natural gas, for instance, produces no mercury emissions, half the carbon dioxide of coal and 80 percent less sulfur.

</div>
<div></div>

Study: EPA is not to blame for decline in coal production

Cheap shale gas produced by fracking has driven the decline...

<div>
<div class="img-wrapper">Declining populations of pollinators is a major concern to ecologists because bees, butterflies and other insects play a critical role in supporting healthy ecosystems. Now a new study from urban ecologists at the University of Massachusetts Amherst suggests that when urban and suburban lawns are left untreated with herbicides, they provide a diversity of "spontaneous" flowers such as dandelions and clover that offer nectar and pollen to bees and other pollinators.</div>
Private lawns make up a significant part of urban lands in the United States, an estimated 50 percent of city and suburbs, say Susannah Lerman and co-author Joan Milam, an adjunct research fellow in environmental conservation. They write, "Practices that support nesting and foraging opportunities for bees could have important implications for bee conservation in suburban areas."

Lerman, an adjunct UMass Amherst faculty member who is also with the U.S. Forest Service, says, "We are still surprised at how many bees we found on these untreated lawns."

In this study of lawns in suburban Springfield, Mass., she and Milam found that "spontaneous lawn flowers could be viewed as supplemental floral resources and support pollinators, thereby enhancing the value of urban green spaces." Details appear in the current issue of Annals of the Entomological Society of America.

For this study, supported by the National Science Foundation, the researchers enlisted owners of 17 lawns in suburban Springfield. Between May 2013 and September 2014, the homeowners did not apply chemical pesticides or herbicides to lawns.

"We documented 63 plant species in the lawns, the majority of which were not intentionally planted," the authors report. Lerman and Milam visited each yard six times per year for two years, finding a total of 5,331 individual bees representing 111 species, of which 97 percent were native to North America.

Of particular interest was the discovery of a large population of Lasioglossum illinoense, a widespread sweat bee species and common in its range, but known in Massachusetts only from a single specimen collected in the late 1920s. The population of L. illinoense in Springfield lawns documents the northeastern range limit for this species.

Conserving native bees for their vital pollination services is of national interest, Lerman and Milam point out, and this new information on native bee distribution and abundance is important for making informed conservation and management decisions regarding pollinator conservation.

Overall, one of their main findings, say Lerman and Milam, is that "when lawns are not intensively managed, lawn flowers can serve as wildlife habitat and contribute to networks of urban green spaces."

Further, "developing outreach to homeowners and lawn care companies to encourage, rather than eliminate, lawn flowers such as dandelions and clover and thin grass cover or bare spots could be a key strategy for urban bee conservation programs targeting private yards."


</div>
<div></div>

Scientists: Help save the bees by keeping lawns natural

Declining populations of pollinators is a major concern to ecologists...

Hurricane Matthew maintains strength along Atlantic Coast. In its record-long week as a major hurricane, Matthew has threaded the needle with its track, staying over warm waters that provide fuel and avoiding land that could starve it. That's been a bit of good news for Florida, but if does actually hit land farther up the coast - and that's still a big question mark - that region would pay the price for Florida's good luck.
Here are some questions and answers about Hurricane Matthew:
---
Q: What does Matthew not quite hitting Florida mean for Georgia and the Carolinas?
A: It keeps the danger level higher, meteorologists say, because the close-but-not-quite-over-land track has kept Matthew's eye relatively strong. It's now been a week and counting as a major hurricane.
Matthew has found "one of the most ideal tracks that a hurricane can find to maintain that intensity," said University of Miami tropical meteorology researcher Brian McNoldy.
"It probably would be weaker if it would have gone over land in Florida instead of what it's doing," agreed senior scientist Christopher Davis at the National Center for Atmospheric Research in Boulder, Colorado.
Q: How tight a needle has Matthew threaded?
A: Matthew is traveling up the Atlantic's warm Gulf Stream. A bit to the east, the water is cooler, providing weaker fuel. Just 10-to-30 miles westward is the coast, where the air is drier.
When a storm moves over land from warm water, it is like the ultimate severe diet: Eventually, it starves.
"This is a case that will probably save a lot of the coastal cities from pretty destructive wind, but the hurricane itself will maintain a lot of intensity," McNoldy says.
Just outside the eyewall, the wind speed has dropped dramatically; by noon Friday, no place on Florida had sustained winds that were hurricane force, even though Cape Canaveral had a gust of 107 mph, says former hurricane hunter meteorologist Jeff Masters, meteorology director of Weather Underground.
That makes storm surge more of a problem than winds, at least in Florida, according to McNoldy and Masters.
---
Q: Why is Matthew hugging the coast, but not making landfall?
A: There's no scientific reason meteorologists know of. Hurricanes are guided by atmospheric currents, not ocean flows or the cut of the coastline.
"At this point it's just luck," McNoldy says. "There is no real reason why this whole curve is going the shape of the coastline. It could have gone 20 miles east, 20 miles west."
Even when Matthew passed between Haiti and Cuba, it mostly avoided land, especially mountains that could dramatically choke storms.
"It's quite strange actually," McNoldy says. "The atmosphere doesn't really know about the curvature of the coastline."
---
Q: How unusual for Matthew to stay strong so long?
A: It's not just unusual - it's a record, if you look at it in a certain way.
At more than a week of major hurricane strength, with sustained winds over 110 mph, Matthew beat the old record of six days for storms after Sept. 25, according Phil Klotzbach, meteorology professor at Colorado State University. Klotzbach uses this date - after start of fall - because atmospheric and water conditions are quite different in the later part of hurricane season, making it harder for storms to stay strong.
Matthew has been moving over water several degrees warmer than average, on a track relatively free of higher, weakening winds. These conditions, especially the winds, are likely to change.
---
Q: So will the U.S. continue its "drought" of major hurricane landfalls?
A: It's been nearly 11 years since 2005's Hurricane Wilma, since a major hurricane made landfall in the United States, a record long time. Meteorologists had been thinking Matthew would end it, but now they say there's a good possibility the drought will continue.
South Carolina still has a decent chance of being hit directly, but even then, Matthew could weaken just a bit and slip below major hurricane status, Masters says.
The nearly 11 year drought is an artificial construct, just random chance, Masters says. For example, Superstorm Sandy struck during that time and was devastating, but technically wasn't a major hurricane in terms of wind speed, even if it was major for destruction. And in 2008, Hurricane Ike missed being a major hurricane at landfall by just 5 mph, so if definitions had been slightly different, no one would be talking drought, Masters says.
---
Q: Has anything good come out of Matthew's hugging <a href="https://www.bing.com/search?q=florida&amp;cvid=519823df7dbe481f9c65f735e2dbf1cb&amp;FORM=ANAB01&amp;PC=HCTS">Florida</a>?
A: Most likely yes, says Davis. The National <a href="http://www.earth.com/endangered-species/megalagrion-oceanicum/">Oceanic</a> and Atmospheric Administration planes fly out of western Florida and the proximity has enabled them to make many research trips.
Plus, the storm has been close enough to NOAA radar to provide scientists with good inside-the-action data, Davis says.
"In a sense you can look at this as being a benefit in some ways to hurricane research," Davis says. "A silver lining perhaps."
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Hurricane Matthew maintains strength along Atlantic Coast

Hurricane Matthew maintains strength along Atlantic Coast. In its record-long...

<div>Forest fires hit the headlines all too regularly - in fact, fire affects about 4.64 million km2 of biomass per year, an area almost three times the size of Alaska. But after the fire something remains - stable carbon.</div>
<div>

Pyrogenic organic carbon, sometimes called black carbon or PyC, is the dark, charcoal-like form of carbon that's left on the soil when vegetation is burned. It is not much of a pollutant though - it plays a role in both climate and soil science, because of its ability to absorb sunlight and store nutrients needed for plant growth.

But despite its importance in maintaining our ecological balance, researchers have historically had very little knowledge of just how much PyC we have on Earth, or where it can be found.

Thanks to work from researchers at the University of Zurich (UZH) and their study published in <a href="http://journal.frontiersin.org/article/10.3389/feart.2016.00080/full" target="_blank">Frontiers in Earth Science</a>, that's all about to change. They have developed the world's first global PyC database, and they say that it, in time, it will help us to refine our understanding of the carbon cycle.

This undertaking, led by Dr. Samuel Abiven, involved the collection of more than 560 measurements of PyC across a range of published studies. This provided data on everything from the soil type to what's called the 'soil organic carbon' - a key measure of the soil's health. To determine why PyC might be found in each study region, the team also looked at the three main factors that could influence its presence in soil - (1) land use and the nature of fires, (2) climate conditions, such as temperature and humidity, and (3) the soil's properties, e.g. its acidity. For these, Abiven and his team had to look to other valuable sources of data, including NASA satellite imagery products, which offered insights into land cover or the pattern and frequency of fires in each region.

Once assembled, the database could then be used to examine the presence of PyC across the globe, and the results were surprising. They found that, PyC is a major component in soil overall the world, representing 13% of the organic matter in average, which corresponds to more than half of the organic matter identified until now. In some regions, PyC represented up to 60% of the organic matter. As the authors have said themselves, these results paint "an unexpected new picture on PyC distribution in soils."

A key finding was that the type of fire didn't make a difference - fires could be large and intense, or 'cool' and small, the resulting amount of PyC found in the soil varied very little. Another result was the link between PyC content and land use - agricultural land came out on top, with the highest proportion of this useful form of carbon in its soil. Unsurprisingly, warm equatorial regions were found to be PyC-rich, whereas polar regions, with their much lower vegetation cover, were show low PyC concentrations. High pH, clay-rich soils seemed to retain their pyrogenic organic carbon better than any other soil type - the authors believe that this is because its special minerals can bind and stabilize PyC for an extended duration.

When asked what he believed to be the key finding of the study, Abiven said, "It is that PyC represents such a large amount of the soil organic matter - there is more of it than there are identifiable molecules that originate from plants. This makes it the most persistent compound in soil we know to date. In addition, the fact that soil properties matter more than fire patterns or climate reflects the importance of PyC to longer term dynamics."

There are some limitations to this study - as yet, most of the data collected come from Europe, North America and Australia, leaving parts of the world unexplored. But with input from the wider scientific community, Abiven hopes to change that, "The <a href="https://dx.doi.org/10.6084/m9.figshare.3750657.v2" target="_blank">database</a> is available and open access to the scientific community and everybody is welcome to use and extend it!"


</div>
<div></div>

How much black carbon is left behind after a forest fire?

Forest fires hit the headlines all too regularly - in...

Algae blooms are forcing the closure of shellfish beds around New England, including most of Narragansett Bay in Rhode Island and much of the coast of Maine.
It's the first time harmful algae has prompted a shellfishing closure in Rhode Island, the state Department of Environmental Management said Friday.
Shellfish dealers in Rhode Island have been asked to stop selling their inventory, and consumers have been asked not to eat the shellfish until tests come back to determine whether the contamination has gotten into the meat, a state health department official said. No illnesses had been reported Friday.
Officials said the ban will remain in place until further notice.
In Maine, shellfishing is closed on the coastline between Deer Isle and the Canadian border.
The Portland Press Herald reports high levels of the toxin domoic acid have been detected in shellfish in Maine, leading to a recall of about five tons of mussels and clams.
"A closure for this toxin in eastern Maine is unprecedented, that is not anything anyone has ever seen," Darcie Couture, a Brunswick marine scientist and former head of the state's marine biotoxin program, told the newspaper. "No one on this coast is that experienced with a domoic acid event," Couture said. "I don't think it is sinking in how serious this is."
Rhode Island officials are monitoring for the same toxin, which can cause serious health problems.
Ernest Julian, a spokesman for the state Health Department, says eating contaminated shellfish can cause symptoms including vomiting, abdominal cramps and diarrhea and memory loss. Eating enough can cause death, he said.
"It's not common, but it's possible," he said.
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Algae blooms force shellfish bans in parts of New England

Algae blooms are forcing the closure of shellfish beds around...

The EU celebrated the Paris Agreement's imminent entry into force with a ceremony at United Nations headquarters on Friday, claiming credit for pushing the treaty that seeks to curtail the emissions of greenhouse gases past its final hurdle.
Poland, an EU member state, deposited the documents necessary for joining the treaty during the ceremony, bringing the number of EU countries that are party to the deal to eight.
The Paris Agreement is set to take effect on Nov. 4 - 30 days after the number of countries ratifying the deal accounted for more than 55 percent of global emissions on Wednesday.
"Thanks to this, the second condition necessary for this international agreement to enter into force was met and the EU has triggered the action," said Slovak Environment Minister Laszlo Solymos, whose country currently holds the rotating Presidency of the Council of the European Union.
U.N. deputy spokesman Farhan Haq said Bolivia, Nepal and Canada joined EU countries Austria, France, Germany, Hungary, Malta, Portugal and Slovakia in depositing their ratifications Wednesday and that all those countries would be considered to have pushed the treaty over the threshold together.
The Paris Agreement which was adopted by consensus on Dec. 12, 2015, commits rich and poor countries to take action to curb the rise in global temperatures that is melting glaciers, raising sea levels and shifting weather patterns. It requires governments to present national plans to reduce emissions to limit global temperature rise to well below 2 degrees Celsius (3.6 degrees Fahrenheit).
But the treaty stipulated that it would only enter into force 30 days after at least 55 countries accounting for at least 55 percent of global emissions deposited their instruments of ratification at the U.N.
On Sept. 21, 31 countries formally joined the accord, bringing the total number to 60 but because they only accounted for a little less than 48 percent of emissions, the agreement remained in limbo.
Meanwhile, a number of European countries that had ratified the agreement and could have potentially triggered the accord, could not join because EU rules required them to enter as bloc - only after all 28 member states' parliaments each approved the deal.
This created a sticky situation for the EU - which accounts for 12 percent of global emissions and prides itself on being a leader in the fight against global warming - until last week when diplomats crafted an exception allowing individual nations to sign on.
As of Friday, 75 parties accounting for 59.9 percent of emissions had joined.
Miguel Arias Canete, the EU's commissioner for climate action and energy, said he expected more European countries to ratify the accord soon.
"Never before has an important agreement been ratified so quickly and so well," Canete said. "This is a clear sign of the political will to accelerate the transition to a low carbon economy and we need that in bucket loads because climate change is wreaking havoc across the globe now as we sit here."
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European Union celebrates the Paris Agreement on climate change

The EU celebrated the Paris Agreement's imminent entry into force...

<div>
<div class="img-wrapper">As Hurricane Matthew continues to crawl along the southeastern U.S. coast NASA observed the storm's winds, clouds, precipitation and more. Matthew remained a major hurricane on Friday, Oct. 7 at 2 p.m. EDT.</div>
On Oct. 6, NASA's CloudSat passed over the eastern quadrant of Hurricane Matthew at 2:30 p.m. EDT. CloudSat revealed the anvil (thick cirrus cloud cover) with cumulus and cumulonimbus clouds beneath the cirrus. CloudSat found areas of higher reflectivity that included larger water and/or ice droplets throughout the clouds.

The next day, NASA's Soil Moisture Active Passive (SMAP) satellite observatory captured data on Matthew's winds. SMAP observations of hurricane Matthew showed winds up to 132 mph (59 meters per second/212 kph) at 7:52 a.m. EDT (11:52 UTC) on Oct. 7. "SMAP has excellent sensitivity to extreme winds, far beyond that from typical scatterometers," said Alexander Fore, of NASA's Jet Propulsion Laboratory in Pasadena, California. "SMAP is sensitive to these extreme winds due to the use of the L-band passive brightness temperature observation, which has the additional benefit of not being attenuated by rain giving accurate wind speeds regardless of rain conditions."

SMAP will map global soil moisture and detect whether soils are frozen or thawed. The mission will help scientists understand the links between Earth's water, energy and carbon cycles; help reduce uncertainties in predicting weather and climate; and enhance our ability to monitor and predict natural hazards such as floods and droughts.

At 2:30 p.m. EDT a visible image from NOAA's GOES-East satellite showed Matthew's clouds engulfing almost all of Florida, Georgia and the Carolinas. The image was created by the NASA/NOAA GOES Project at NASA's Goddard Space Flight Center, Greenbelt, Maryland.

At that time a Hurricane Warning was in effect for Cocoa Beach to Surf City. A Hurricane Watch is in effect from north of Surf City to Cape Lookout, North Carolina. A Tropical Storm Warning was in effect from Florida's Sebastian Inlet to Cocoa Beach, and north of Surf City to Duck, North Carolina, and the Pamlico and Albemarle Sounds, North Carolina.

At 2 p.m. EDT (1800 UTC) on Oct. 7, Matthew remained a Category 3 Hurricane on the Saffir-Simpson Hurricane Wind Scale. The eye of Hurricane Matthew was located near latitude 29.7 North, longitude 80.7 West. That's about 40 miles (60 km) east-southeast of St. Augustine, Florida.

NOAA's National Hurricane Center (NHC) said Matthew is moving toward the north-northwest near 13 mph (20 km/h), and this general motion is expected to continue today. A turn toward the north is expected tonight or Saturday, Oct. 8. On the forecast track, the center of Matthew will continue to move near or over the coast of northeast Florida and Georgia through tonight, and near or over the coast of South Carolina on Saturday.

Maximum sustained winds are near 115 mph (185 kph) with higher gusts. Matthew is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Although weakening is forecast during the next 48 hours, Matthew is expected to remain a hurricane until it begins to move away from the United States on Sunday.

Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 185 miles (295 km). The latest minimum central pressure reported by an Air Force Hurricane Hunter plane was 947 millibars.

A wind gust to 84 mph (135 kph) was recently reported at Ponte Vedra, and a coastal marine observing station at St. Augustine recently measured a wind gust of 85 mph (137 kph). A tidal gauge at Fernandina Beach, Florida reported a storm surge inundation of 3.11 feet above mean higher high water.

For updated forecasts, please visit the National Hurricane Center website: <a href="http://www.nhc.noaa.gov/" target="_blank" rel="noopener">http://www.nhc.noaa.gov</a>.


</div>
<div></div>

Hurricane Matthew continues to crawl along the Florida coast

As Hurricane Matthew continues to crawl along the southeastern U.S....

<div>Rising levels of noise in the ocean have been identified as a growing concern for the well-being of marine mammals, but other threats such as pollution, climate change, and prey depletion by fisheries may also harm marine mammals and influence their response to additional noise. Current knowledge and data are insufficient to determine what combination of factors cause the greatest concern, says a new report by the National Academies of Sciences, Engineering, and Medicine. The report includes a newly developed conceptual framework model to help federal agencies and research communities explore the potential cumulative effects of human activities on marine mammals.</div>
<div>

Building on previous Academies reports that explored the impact of sound on marine mammals, this report places sound in the context of other stresses that these animals may experience. The report highlights three main challenges in making progress on this issue of cumulative effects: understanding the interaction between different stress-causing agents (stressors), designing studies to better understand the response to more than one stressor, and the difficulty in detecting impacts at the population level.

While experiments are useful in defining the relationship between exposure level (the dosage) and a behavioral or physiological response to one stressor, it is typically impractical to test the interaction among varying dosages of multiple stressors. The conceptual framework recommended in the report is designed to help researchers address discrete aspects of the problem and develop tools to help assess how these various factors affect marine mammals. One tool recommended by the committee is a real-time, centralized system for reporting health data of different populations.

"Current scientific theory and data for individual marine mammals or their population is not enough to predict the total risk from a combination of threats," said Peter L. Tyack, professor of marine mammal biology at the University of Saint Andrews in Scotland and the chair of the committee that conducted the study and wrote the report. "The model we developed in this report provides a way to examine the effects associated with the exposure to a single stressor in the context of the cumulative effect of other stressors in the animal's environment."

Although the impacts from some stressors such as persistent chemical pollutants or ocean climate cannot be readily reduced, others like noise, fisheries, or shipping routes can be managed to reduce their impact. For managers to be able to decide how best to reduce the effects of activities that threaten the mammals, researchers need to develop methods to assess how changes in a combination of stressors can best bring the population to a healthy resilient state. For example, research shows reduced noise associated with lessened commercial shipping after the terrorist attacks on the World Trade Center and Pentagon on Sept. 9, 2001, was associated with reduced stress hormones among the right whales than seen earlier.

The committee also recommended using a framework that assesses the health of individual mammals impacted by an activity, and using changes in health to determine how it could eventually affect populations. For example, North Atlantic right whales, a protected species since the 1930s, still have an extremely low population size, are exposed to noise and chemical pollutants, and also encounter physical injury during their lengthy migration due to entanglement in fishing gear and collisions with shipping vessels. Archived records of their life histories, including photos and drawings, have helped provide information on health variations and locations over time. Researchers have used these data to determine certain causes of decline in the population, such as a dramatic decrease in the health of female whales and low reproduction coinciding with reduced prey availability. These different relationships can be used in the proposed framework to detect early warning signs of risks to populations. The report says federal agencies and other research funders should support efforts to develop case studies such as the right whales and apply this model to other marine mammal populations.

The report recommends building affordable surveillance systems that can detect changes in population parameters such as size or reproductive rate and hence indicate when populations may be at risk due to exposure to stressors. Additionally, the committee proposed a decision tree that helps identify when interactions between stressors should be studied as high priority when considering the effect of a focal stressor on a population.

The study was sponsored by the Office of Naval Research, the National Oceanic and Atmospheric Administration, the Bureau of Ocean Energy Management, and the Marine Mammal Commission. The National Academies of Sciences, Engineering, and Medicine are private, nonprofit institutions that provide independent, objective analysis and advice to the nation to solve complex problems and inform public policy decisions related to science, technology, and medicine. They operate under an 1863 congressional charter to the National Academy of Sciences, signed by President Lincoln. For more information, visit <a href="http://national-academies.org/" target="_blank" rel="noopener">http://national-academies.org</a>. A roster follows.
###
Contacts:

Riya V. Anandwala, Media Relations Officer
Rebecca Ray, Media Relations Assistant
Office of News and Public Information
202-334-2138; e-mail <a href="mailto:news@nas.edu">news@nas.edu</a>
<a href="https://www.eurekalert.org/pub_releases/2016-10/naos-ate100716.php" target="_blank" rel="noopener">national-academies.org/newsroom</a>national-academies.org/newsroom

Follow us on Twitter <a href="https://twitter.com/theNASEM" target="_blank" rel="noopener">@theNASEM</a>

Copies of Approaches to Understanding the Cumulative Effects of Stressors on Marine Mammals are available at <a href="http://www.nap.edu/" target="_blank" rel="noopener">http://www.nap.edu</a> or by calling 202-334-3313 or 1-800-624-6242. Reporters may obtain a copy from the Office of News and Public Information (contacts listed above).

THE NATIONAL ACADEMIES OF SCIENCES, ENGINEERING, AND MEDICINE

Division on Earth and Life Studies

&nbsp;

</div>
<div></div>

Measuring the impact of human activity on marine mammals

Rising levels of noise in the ocean have been identified...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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2022 illustrated the consequences of a warming climate

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Satellites reveal how Earth's systems are interconnected

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Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tracking changes in Earth's water cycle

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Mysterious "spoke season" captured on Saturn

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Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Plants help remove heavy metals from contaminated soil

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Weeds are becoming increasingly resistant to herbicides

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Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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NASA monitors giant dust storms on Mars

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Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Qeshm Island in the Strait of Hormuz

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Inhambane Bay in southeast Mozambique

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Kangerlussuaq Glacier on the Greenland ice sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Ocean heat influences regional climate

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring the dynamic shape of the sea surface

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