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.



-----



Like what you read? <a href="https://www.earth.com/subscribe/">Subscribe to our newsletter</a> for engaging articles, exclusive content, and the latest updates.&nbsp;



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



-----

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...

Summer water levels for the Great Lakes could be higher than normal and above last year's mark through early fall due to a wet spring season, experts predict.

The <a href="http://www.lre.usace.army.mil/Missions/Great-Lakes-Information/">Great Lakes Hydraulics and Hydrology Office </a>at the U.S. Army Corps of Engineers Detroit District announced Monday in its six-month water level forecast that summer water levels on lakes <a href="https://www.earth.com/news/map-phczs-great-lakes/">Superior</a>, Michigan-Huron, St. Clair and Erie will be at their highest since 1996-1998, the <a href="https://www.ap.org/en-us/">AP</a> reported.

"Above average precipitation on the Great Lakes and very wet conditions in the months of April and May pushed levels higher than originally forecasted," said Keith Kompoltowicz, chief of Watershed Hydrology at the Army Corps Detroit District.

The group's forecast data also show that as of Sunday, Lake Ontario is up nearly 3 feet from the level it was at this time last year. The lake exceeded its highest elevation ever for June, which was set in 1952.

Army Corps officials said that the water levels on Ontario are expected to continue this month before they begin their seasonal decline.

"It would be great for us if water levels stayed stable, but that never seems to happen," said Larry Taunt, commodore for the Muskegon Yacht Club, which may soon need to raise its fixed docks to keep them above the water. "We're not there yet, but we are looking at that," 

The Army Corps works with Environment and Climate Change Canada to release the official six-month forecast.

Year-round recording of Great Lakes water levels has occurred since 1918.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.ap.org/en-us/">AP</a>

Prediction: Great Lakes water levels up this summer

Summer water levels for the Great Lakes could be higher...

Researchers may have been rediscovered the 8th Wonder of the World, 131 years after it was buried by a volcanic eruption in New Zealand, the <a href="https://www.theguardian.com/">Guardian</a> reported.

In the mid-1800s, the pink and white terraces of Lake Rotomahana in the North Island attracted tourists from around the globe, the story said. When Mount Arawera erupted in 1886, the dramatic cascading pools descending into the lake’s temperate waters were lost.

Two researchers think they have pinpointed the location where the terraces may lie, preserved 10 to 15 meters below the surface under layers of mud and ash. A full archaeological survey is needed to excavate the site, the researchers said.

“They [the terraces] became the greatest tourist attraction in the southern hemisphere and the British empire, and shiploads of tourists made the dangerous visit down from the UK, Europe and America to see them,” said researcher Rex Bunn. “But they were never surveyed by the government of the time, so there was no record of their latitude or longitude.”

Bunn and Dr Sascha Nolden believe the terraces were not destroyed or pushed to the bottom of the lake, as earlier research suggested. Instead, the 8th Wonder of the World was likely buried on the foreshore of the lake.

To determine the location, the researchers used the field diaries of geologist Ferdinand von Hochstetter, which contain a detailed description of the terraces prior to the 1886 eruption.

“Our research relied on the only survey ever made of that part of <a href="https://www.earth.com/news/geothermal-motherlode-new-zealand/">New Zealand</a> and therefore we are confident the cartography is sound,” Bunn said. “Hochstetter was a very competent cartographer.”

Since the pair’s research paper was published this month in the <a href="http://www.tandfonline.com/toc/tnzr20/current">Journal of the Royal Society of New Zealand</a>, Bunn said he had received daily offers of help to conduct a survey and was in the process of assembling a “team of the willing” to begin exploring the site.

“We want to undertake this work in the public interest. And I have been closely liaising with the ancestral owners of the land, the Tuhourangi Tribal Authority, and they are supportive and delighted with the work,” he said.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.theguardian.com/">Guardian</a>

Image Credit: Pink and White Terraces (1886) by Charles Blomfield

Photograph: Alamy

Has the 8th Wonder of the World been rediscovered?

Researchers may have been rediscovered the 8th Wonder of the...

In areas that are in close proximity to <a href="https://www.earth.com/image/sulfur-dioxide-emissions-volcanoes/">volcanoes</a>, you’d imagine that there is a premium on any information that may be indicative of impending eruptions. Unfortunately, scientists don’t have a great understanding of what events to look out for that lead up to volcanic eruptions. One significant limitation in this area has been the lack of knowledge around the temperature history of magma.

A new study has analyzed the crystals of the mineral zircon (zirconium silicate) in the magma of an eruption that occurred in New Zealand roughly 700 years ago, in order to determine the magma’s history. This analysis indicated that the magma experienced a “cool” period for thousands of years before it heated up. Once the magma temperature hit 750 degrees Celsius, it likely took no more than a few decades before the volcano erupted.

The researchers believe this analysis is applicable to many of the volcanoes currently active today, including those in the Cascade Range in the United States, which contains the famous Mt. Hood. In a previous study, the researchers found that Mt. Hood also existed in a colder state for a long period of time before rapidly shifting into its eruptive phase. Understanding the pattern of long-term crystal storage in near-solid magma could help scientists recognize when other volcanoes on our planet are about to erupt as well.

“Mobility in magma is a function of temperature and most of the time when it’s sitting there in the Earth’s crust under the volcano it’s cool," says Adam Kent, a geologist at <a href="http://oregonstate.edu/">Oregon State University</a> and co-author on the study. “Of course, cool is a relative description since it’s still some 650 degrees (Celsius). I wouldn’t put my finger on it.” Kent explains that in order to result in an eruption, the Earth’s surface magma must heat up so it can be liquid enough to squeeze through the cracks in the Earth and reach the surface. When magma is at lower temperatures, it’s too thick and rich in crystals to be this mobile.

The researchers believe that by using zircon crystals, they can analyze what is going on below the surface of a volcano before it potentially erupts. These crystals appear in the magma of many volcanoes along the “ring of fire” in the Pacific Ocean, as well as in other places on the planet. 

Besides the crystal analysis, their findings also indicate that if a lot of volcanoes store their magma in this colder state, finding a volcano that contains warm and mobile magma might help scientists be wary of a potential eruption. 

Overall, this study is helping to improve our understanding of these eruption events, paving the way to making volcanic locations safer. More information can be found on this paper in the journal <a href="http://www.sciencemag.org/">Science</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://oregonstate.edu/">Oregon State University</a>

Crystals in magma may help scientists forecast volcanic eruptions

In areas that are in close proximity to volcanoes, you’d...

An area on the seafloor of the Japanese coast where two tectonic plates meet is the subject of study for an international team of researchers interested in the mechanics of earthquakes and tsunamis. This is the location of a subduction zone, where the Pacific Plate slides underneath the Eurasian Plate, and is part of the “ring of fire” that goes around the <a href="https://www.earth.com/news/typhoon-songda-moves-in-the-open-pacific-ocean/">Pacific Ocean</a>. 

Researchers are attempting to understand slow-slip earthquakes in these subduction zones, recording data from instruments placed on the seafloor and in boreholes at this location. “This area is the shallowest part of the plate boundary system,” explains Demian Saffer, professor of geosciences at <a href="http://www.psu.edu/">Penn State University</a>. “If this region near the ocean trench slips in an earthquake, it has the potential to generate a large tsunami.”

The focus of the study was slow earthquakes, which occur from slip events that happen over days or weeks. Previous research has found that slow earthquakes play an important part in earthquake occurrence at tectonic plate boundaries, and may be able to show where some of the energy that gets built up in a fault or subduction zone goes.

“These valuable results are important for understanding the risk of a tsunami,” says James Allan, program director in the <a href="https://www.nsf.gov/div/index.jsp?div=OCE">National Science Foundation's Division of Ocean Sciences</a> “Such tidal waves can affect the lives of hundreds of thousands of people and result in billions of dollars in damages, as happened in Southeast Asia in 2004.”

The data that was gathered for this study showed that roughly 50 percent of the energy in the shallow subduction zone was released during a slow earthquake. The other 50 percent may be stuck in the permanent shortening of the upper plate, or may be stored for a century or more until another earthquake occurs. The research team believes that a slow slip could reduce the risk of tsunamis through periodically relieving this built up energy – but it is probably more complicated than that.

A series of slow slip events around this plate interface was also shown to occur about every 12 to 18 months, and could be days or weeks long. “The area where these slow earthquakes take place is uncompacted, which is why it has been thought that these shallow areas near the trench act like a shock absorber, stopping deeper earthquakes from reaching the surface,” says Saffer. “Instead we have discovered slow earthquakes of magnitude 5 or 6 in the region that last from days to weeks.”

Because earthquakes that occur away from the subduction zone can sometimes trigger these slow earthquakes, the researchers now know this area is more sensitive than previously thought. 

Much is left to be discovered about the mechanics of these earthquakes and how they may trigger future earthquakes or tsunamis. The data being gathered from the seafloor is imperative if we want to one day figure out how to reduce the damage that these events cause.

[caption id="attachment_454825" align="aligncenter" width="255"]<a href="https://www.earth.com/wp-content/uploads/2017/06/143040.jpg"><img class="size-medium wp-image-454825" src="https://www.earth.com/wp-content/uploads/2017/06/143040-255x300.jpg" alt="" width="255" height="300" /></a> Credit: Demian Saffer, Penn State[/caption]

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.psu.edu/">Penn State</a>

Image Credit: Demian Saffer, Penn State

Slow earthquakes near Japan provide insight into tsunami generation

An area on the seafloor of the Japanese coast where...

Earthquakes are a constant problem in the U.S. state of California, causing significant damage and posing a threat to the wellbeing of the state’s residents. Efforts by scientists to understand the multitude of factors that cause these quakes are ongoing, and have the potential to save lives as well as preserve infrastructure. 

Recently, a new study from the <a href="http://www.berkeley.edu/">University of California, Berkeley</a> revealed that the winter rain and snow in California actually has a physical effect on the geology responsible for earthquakes. During the winter, rain and snow push down the <a href="https://www.earth.com/news/gobi-desert-dust-sierra-nevadas/">Sierra Nevada</a> and Coast Ranges. In the summer, these mountains “rebound” by about a centimeter, which affects the stress on earthquake faults and results in a seasonal increase in minor earthquakes.

Furthermore, the weight of ground and stream water depresses the Sierra Nevada mountains by about half a centimeter, causing the same effect. The rising and falling of this land causes the earth’s crust to flex, creating a pushing and pulling action on the natural fault lines.

Researchers were able to measure these tiny rises and falls using the regional global positioning system, and could calculate the stress on the earth due to these water loads. They analyzed 3,600 earthquakes from 2006-2015, correlating each earthquake’s occurrence with the calculated peak stress on the fault from which it occurred. Their data revealed that California’s faults experienced more small earthquakes when these seasonal changes were most significant.

The state’s largest fault – the San Andreas fault – experienced an increase in small earthquakes (those less than magnitude 2) in late summer and early fall, when the water load has diminished the most on the mountains. However, it’s unlikely residents would have noticed, as most people can’t feel quakes below a magnitude 2.5.

“It’s not that all earthquakes happen in September. There is no earthquake season,” clarifies Roland Bürgmann, senior author of the paper and <a href="http://www.berkeley.edu/">UC Berkeley</a> professor of earth and planetary science. “It all depends on details of the loading, the location of the fault and the geometry of the fault.”

The researchers stress that the impact of these water-related factors are tiny –increasing the chance of earthquakes by no more than a few percentage points. Previous studies have shown that massive earthquakes – known as megaquakes – can trigger other large quakes from thousands of miles away due to seismic waves. The data presented in this study indicates a similar amount of stress is caused by the seasonal water loading in California. 

“We don’t see an increase in large-magnitude earthquakes from these low-amplitude stresses caused by seasonal water storage,” says Johnson. “What these results are showing, however, is that we do see a correlation with small earthquakes from low-amplitude stresses.”

Overall, this study can provide seismologists with much needed information on how faults rupture and what factors lead to an earthquake occurring. These findings won’t be used as indicators for times when large earthquakes should be expected; rather, they will better serve scientists’ understanding of the mechanics of earthquakes. 

More information on this paper can be found in the journal <a href="http://www.sciencemag.org/">Science</a>.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://www.berkeley.edu/">University of California – Berkeley</a>

Some California earthquakes caused by seasonal rain and snowfall

Earthquakes are a constant problem in the U.S. state of...

Warm winds from an especially strong El Nino have caused an area of west Antarctica more than twice the size of California to partially melt, according to a new study.

The warm spell persisted for more than two weeks in January 2016, according to the study published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>. 

Satellite data revealed a mix of melted snow and <a href="https://www.earth.com/video/thinning-ice-sheets-greenland/">ice</a> over most of the Ross Ice Shelf, a thick platform of floating ice that channels about a third of the ice flowing from the West Antarctic Ice Sheet into the ocean, the study said.

Researchers have been gathering evidence for years that warm ocean water is melting west Antarctic ice shelves from beneath, but this is one of the first times they've been able to document how warm air could also cause widespread melting from above.

A few weeks before the warm spell, researchers had installed the necessary instruments to investigate these processes in West Antarctica as part of a study to better understand how clouds affect the amount of energy that reaches the snow surface and influence its temperature.

"We were extraordinarily fortunate to be able to deploy state-of-the art equipment to West Antarctica just before this large melt event occurred," said study coauthor Dan Lubin, principal investigator of the <a href="https://en.wikipedia.org/wiki/Atmospheric_Radiation_Measurement_Climate_Research_Facility">Atmospheric Radiation Measurement </a>(ARM) <a href="https://www.arm.gov/publications/programdocs/doe-sc-arm-15-040.pdf">West Antarctic Radiation Experiment</a> (AWARE). Lubin is a research physicist at the <a href="https://scripps.ucsd.edu/">Scripps Institution of Oceanography</a>. 

When Julien Nicolas, lead author of the paper, got a January 2016 alert from the AWARE expedition that the weather at their campsite atop of the West Antarctic Ice Sheet had turned unseasonably warm, he checked to see in the satellite data what was happening to the rest of west Antarctica.

The presence of water in the snow is often hard to detect from visible satellite imagery, especially if clouds block the view. Instead, Nicolas analyzed satellite measurements of the microwave radiation emitted by the snowpack, since dry and wet snows have very different microwave signatures.

What he saw during the melting event was an area of roughly 300,000 square miles, including most of the Ross Ice Shelf, that likely contained a mix of snow and water.

"What probably happened is that the surface snowpack was able to contain the meltwater, acting as a buffer and preventing the formation of melt ponds and streams that can be common on some Antarctic ice shelves," said Nicolas, research associate at <a href="https://www.osu.edu/">The Ohio State University</a>’s <a href="https://bpcrc.osu.edu/">Byrd Polar and Climate Research Center</a>. "But we cannot rule out the presence of standing water in many locations."

The melting was particularly interesting to scientists because it took place during one of the strongest El Nino events on record.

"This conjunction of events was no coincidence," Nicholas said.  "It's a pattern that is emerging. And because we expect stronger, more frequent El Ninos in the future with a warming climate, we can expect more major surface melt events in West Antarctica."

More frequent melting would accelerate the general deterioration of the ice sheet, he said.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.osu.edu/">The Ohio State University</a>

El Nino winds cause widespread ice melt in west Antarctica

Warm winds from an especially strong El Nino have caused...

Life in and around the Amazon River could be harmed significantly by hundreds of hydroelectric dams that have been constructed or are planned, according to a new study.

Economic developers in South America have proposed 428 hydroelectric dams, with 140 currently built or under construction, in the <a href="https://www.earth.com/news/study-examines-how-indigenous-people-alter-the-amazon-rainforest-3/">Amazon</a> basin. The areas is the largest and most complex network of river channels in the world that sustains the highest biodiversity on Earth, the study said.

The rivers and surrounding forests are the source of 20 percent of the planet's fresh water and valuable ingredients used in modern medicine.

While the hydroelectric dams have been justified as providing renewable energy and avoiding carbon emissions, little attention has been paid to the major disturbances dams present to the Amazon floodplains, rainforests, the northeast coast of South America and the regional climate, according to the researchers.

Rivers in the Amazon basin move like a dance, exchanging sediments across continental distances to deliver nutrients to "a mosaic of wetlands," said Edgardo Latrubesse, a  professor at the <a href="https://www.utexas.edu/">University of Texas Austin</a> and lead author of the study.

Sediment transported by rivers provides nutrients that sustain wildlife, contribute to the regional food supplies, and modulate river dynamics that result in high habitat and biotic diversity for both aquatic and nonaquatic organisms, he said.

"People say 'oh another dam, another river.' It's not. It's the Amazon," said Latrubesse. “We have to put the risks on the table and change the way people are looking at the problem. We are massively destroying our natural resources, and time urges us to find some rational alternatives for <a href="https://www.earth.com/news/game-changing-invention-converts-both-co2-and-plastic-waste-into-renewable-energy/" target="_blank" rel="noopener">preservation and sustainable development</a>."

The study introduces the Dam Environmental Vulnerability Index (DEVI), developed to determine the current and potential impacts of dams on rivers and their ecosystems in the Amazon basin. DEVI values quantify on a scale of 0 to 100 an area's vulnerability to potential land use change, erosion, runoff pollution, trapped sediment and overall changes to river systems due to dams.

"To not have an integrated approach is to deny how nature works in the Amazon basin," said Victor Baker, <a href="http://www.arizona.edu/">University of Arizona</a> Regents' Professor of Hydrology and Atmospheric Sciences and co-author of the study. “Our role is to show how nature works and that nature is integrated."

Researchers found that many of the existing dams are located in areas of high sediment yield, such as the Andean Cordillera, which provides more than 90 percent of the detrital sediment to the entire system.

Other large rivers in the central highlands of Brazil are also being impacted, the study said.

Investigation of the Tapajós River -- where the main riverstem has not yet been directly disrupted, but 28 dams were recently constructed in its major tributaries -- showed that the river and all its major tributaries will be impounded if developers move forward with 90 proposed dams and deforestation continues at its current rate.

"Think about putting dams in the Mississippi connecting artificial lakes from Memphis to New Orleans," Latrubesse said. "It would be a scandal because it wouldn't be sustainable. But this is what is proposed for the Tapajós River."

Baker stressed that the Amazon is "the most important river basin on the planet. It's a microcosm of our issues of today involving environment, energy and health of the planet."

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source:  <a href="https://www.utexas.edu/">University of Texas Austin</a>

Amazon basin threatened by hydroelectric dams

Life in and around the Amazon River could be harmed...

Summer wildfires produce more air pollution more than previously believed, according to a new study.

The <a href="https://www.earth.com/news/preparing-new-era-wildfires/">fires</a> release fine, microscopic particles at three times the levels recorded by the <a href="https://www.epa.gov/">U.S. Environmental Protection Agency</a>, according to the study led by the <a href="http://www.gatech.edu/">Georgia Institute of Technology</a>. The specks form aerosols that are hazardous to human health, particularly to the lungs and heart, the study said.

"These are really bad aerosols to breathe from a health point of view," said Georgia Tech researcher Greg Huey.

The research also describes other chemicals in wildfire smoke, some never before measured, and significantly raises the estimated annual emission of particulate matter in the western United States.

Previous EPA data had been based on plume samples taken in controlled burns ignited by forestry professionals. The new study measured plumes from the sky, directly in the thick of  wildfires.

Researchers deployed planes to plow through the plumes of three major wildfires, including the 2013 Rim Fire, the third-largest wildfire in California history. An ensemble of instruments bristling from the flanks of NASA and U.S. Department of Energy aircraft allowed teams of researchers on board to measure chemicals and particles in real time and cull masses of data, upon which the new study is based.

"We actually went to measure, right above the fire, what was coming out," said Huey, a professor in Georgia Tech's School of Earth and Atmospheric Sciences, which he also chairs.

Georgia Tech had instruments and scientists on the NASA DC-8 plane. Researchers associated with a total of more than a dozen universities and organizations participated in data collection or analysis. The study was published in the <a href="http://agupubs.onlinelibrary.wiley.com/hub/jgr/journal/10.1002/(ISSN)2169-8996/">Journal of Geophysical Research: Atmospheres</a>.

"This paper is expected to serve as a basis for the next NASA fire chemical monitoring mission," Huey said.

Wildfire plumes produce methanol, benzene, ozone precursors and other noxious emissions,  which may sound like an oil refinery went up in flames. That's not so far-fetched, as oil and other fossil fuels derive from ancient biomass, the researchers said.

"You can see the smoke, and it's dark for a reason," Huey said. "When you go measuring wildfires, you get everything there is to measure. You start to wonder sometimes what all is in there."

Humans are exposed to harmful aerosols from industrial sources as well, too, but fires produce more aerosol per amount of fuel burned. 

"Cars and power plants with pollution controls burn things much more cleanly," Huey added.

Various aerosols also rise up in the atmosphere, but their net effect on global warming or cooling is still uncertain, as some aerosols reflect sunlight away from Earth, and others trap warmth in the atmosphere, the researchers said.

As global warming expands wildfires in size and number, the ensuing pollution stands to grow along with them, the study said. Stepping up professional human-initiated burnings may help cut these emissions.

So-called prescribed burnings prevent or reduce wildfires, and they appear to produce far less pollution per unit area than wildfires, according to the study.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source:  <a href="http://www.gatech.edu/">Georgia Institute of Technology</a>

Wildfires produce more pollution than previously thought

Summer wildfires produce more air pollution more than previously believed,...

According to <a href="https://www.nasa.gov/press-release/nasa-noaa-data-show-2016-warmest-year-on-record-globally">NASA</a>, 2016 was the <a href="https://www.earth.com/video/hottest-year-2016-record/">hottest year</a> on record globally. This marked the third consecutive year that the planet's average surface temperatures hit a new high. In 2016, the average temperatures across the globe were 1.78 degrees Fahrenheit warmer than the average temperatures of the mid-20th century. Rising temperatures in the United States are made worse in urban areas by what are known as heat islands. A city with over 1 million people can experience daytime <a href="https://www.epa.gov/heat-islands/heat-island-impacts#energy">temperatures</a> up to 5.4 degrees higher than neighboring towns. The evening hours may see temperatures as much as 22 degrees hotter than rural areas. 

Heat islands exist both on the surface and in the atmosphere. Heat islands occur when large populations pump out energy constantly, but the main cause is the modification of a city's landscape. Roads and buildings that have replaced plants and trees are absorbing heat that would be otherwise reflected by vegetation. The <a href="https://www.epa.gov/heat-islands/heat-island-impacts">temperature of city roofs and pavement</a> can shoot up 50 to 90 degrees hotter than the air, especially in the summertime. 

The impacts of the heat island effect can be severe. Heat-related illness and global warming are both exacerbated by heat islands. More energy is consumed and more greenhouse gases are emitted. Air and water quality are worsened.  

So what can be done to cool off these cities and improve the quality of life for urban populations?

The Environmental Protection Agency released a book in 2008 called <a href="https://www.epa.gov/heat-islands/heat-island-compendium">Reducing Urban Heat Islands: Compendium of Strategies</a>. The book describes the heat island effect phenomenon and offers heat reduction strategies for both individuals and communities. Suggestions include <a href="https://www.earth.com/news/earth-day-guide-saving-planet/">planting trees</a> and rooftop gardens and using energy-efficient appliances.

The book was released as part of the EPA’s <a href="https://www.epa.gov/heat-islands/what-epa-doing-reduce-heat-islands">Heat Island Reduction Program,</a> or HIRP. This program includes community outreach tools and guides for people to start their own heat island projects. <a href="https://www.epa.gov/heat-islands/heat-island-webcasts">Webcasts</a> are also held for scientists, practitioners, industry representatives, and government officials from all over the country to discuss the work they have been doing to address heat islands. 

A team of economists from cities across the globe recently conducted <a href="https://www.google.com/amp/s/phys.org/news/2017-05-island-effect-climate-world-cities.amp">an unprecedented study</a> to evaluate the impact of the heat islands on climate change. The study, published last month in the journal Nature Climate Change, revealed that the economic cost of climate change will be approximately 2.6 times higher in urban areas due to heat island effects. 

Richard S.J. Tol, an Economics professor at the University of Sussex, is one of the authors of the study.

“Any hard-won victories over climate change on a global scale could be wiped out by the effects of uncontrolled urban heat islands,” said Professor Tol. We show that city-level adaptation strategies to limit local warming have important economic net benefits for almost all cities around the world.”

While cities only account for a very small area of the Earth's surface, over one half of the world’s population lives in urban communities. <a href="https://unhabitat.org/urban-themes/energy/">City populations</a> consume 75 percent of the globe’s energy and emit 50 to 60 percent of the total greenhouse gases.

“It is clear that we have until now underestimated the dramatic impact that local policies could make in reducing urban warming,” explained Professor Tol.

“However, this doesn't have to be an either/or scenario. In fact, the largest benefits for reducing the impacts of climate change are attained when both global and local measures are implemented together.” 

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How reducing heat islands could slow climate change

According to NASA, 2016 was the hottest year on record...

A new study in ACS’ journal <a href="http://pubs.acs.org/journal/esthag">Environmental Science &amp; Technology</a> of hair samples of southern Beaufort Sea polar bears has shown a significant drop in mercury in recent years.

“Great!” you’re probably thinking, “because mercury is bad, right?” Well technically yes, but researchers think this may actually be a worrying trend. Melissa McKinney and her colleagues think this decrease in mercury levels may be an indication of how climate change has affected their foraging habits, which in turn has affected their diets and body mass.

Previously, other research has found that mercury in the environment – which may be either naturally occurring or come from industrial activities such as <a href="https://www.earth.com/news/kentucky-coal-mining-museum-solar/">coal</a> burning – accumulates in the hair and tissue of the southern Beaufort Sea polar bear. These mercury levels have been found to be at concentrations known to cause harmful effects.

Polar bears are also exposed to mercury through their diets, which mostly consist of seals and whales. However, other research has shown that with the decline of seasonal sea ice, polar bears’ diets have changed. In their study, McKinney and colleagues investigated how this shift might affect polar bears’ mercury levels.

The scientists collected hair samples from these polar bears between 2004 and 2011, analyzing the samples for mercury. Their data revealed a decline in mercury levels among adults of about 13 percent per year.

Through analysis of the bears’ body mass and food sources, they reasoned that the drop in mercury was likely due to the change in the polar bears’ diet and their increasing BMI. Specifically, they believe the polar bears are eating more bowhead whales and bearded seals, which contain less mercury than the ringed seals that the bears used to prey upon more often.

As we attempt to understand the countless impacts of climate change, it’s important that we track our world’s flora and fauna on a micro level as well as a macro level. Changes as significant as enormous loss of sea ice can have effects as tiny as levels of mercury in polar bears.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="https://www.acs.org/content/acs/en.html">American Chemical Society</a>

Declining mercury levels in polar bears due to climate change?

A new study in ACS’ journal Environmental Science &amp; Technology...

Researchers have developed a solar paint that generates hydrogen, the cleanest source of energy, by absorbing water vapor and splitting it.

The solar paint contains a newly developed compound that acts like silica gel used to absorb moisture and keep food, medicines, and electronics fresh and dry.

The new material, synthetic molybdenum-sulphide, also acts as a semi-conductor and catalyses the splitting of water atoms into <a href="https://www.earth.com/news/use-photosynthesis-create-hydrogen-fuel/">hydrogen</a> and oxygen.

"We found that mixing the compound with titanium oxide particles leads to a sunlight-absorbing paint that produces hydrogen fuel from solar energy and moist air,” said lead researcher Torben Daeneke, from <a href="https://www.rmit.edu.au/">RMIT University</a> in Melbourne, Australia. 

Titanium oxide is the white pigment already commonly used in wall paint, meaning that the simple addition of the new material can convert a brick wall into energy, harvesting fuel production real estate.

"Our new development has a big range of advantages," said Daeneke. "There's no need for clean or filtered water to feed the system. Any place that has water vapor in the air, even remote areas far from water, can produce fuel."

Hydrogen can be used in fuel cells as well as conventional combustion engines as an alternative to fossil fuels, said Kourosh Kalantar-zadeh, also of RMIT University.

"This system can also be used in very dry but hot climates near oceans,” he said. “The sea water is evaporated by the hot sunlight and the vapour can then be absorbed to produce fuel.”

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source:  <a href="https://www.rmit.edu.au/">RMIT University</a>

Solar paint can make hydrogen from water vapor

Researchers have developed a solar paint that generates hydrogen, the...

At least 14 people have died and officials have closed portions of rivers throughout the western United States as warm weather is melting the deepest mountain snowpack in recent memory.

Record snowfall on towering western peaks this winter virtually eliminated California's five-year drought and it is now melting rapidly.

In Utah and Wyoming, some rivers gorged by heavy winter snowfall have overflowed their banks. Rivers in Utah are expected to remain dangerously swollen with icy mountain runoff for several more weeks.

This year's velocity and force of the Merced River that runs through Yosemite Valley is similar to a runaway freight train, said Moose Mutlow of the Yosemite Swift Water Rescue Team.

"You step out in front of it, it's going to take you," he said. "You're not going to stop that, and that's what people need to get their heads around."

So far this year, one 50-year-old man is believed to have drowned at Yosemite after falling into the Merced River from a winding trail. His body has not been found.

One of <a href="https://www.earth.com/news/forest-fires-habitats-spotted-owls/">Yosemite's</a> deadliest days was in 2011, when three young church group visitors were swept to their deaths over the 317-foot Vernal Fall.

Elsewhere in California, there have been at least 11 drownings since the snowpack started melting in May, authorities said.

At the San Joaquin River near Fresno, 18-year-old Neng Thao drowned last month swimming in the river during a picnic with his family days before he was set to graduate as the valedictorian of his high school.

And six people have died in the rugged Tule River south of Yosemite. Some drowned, but others suffered injuries suggesting their bodies were beaten to death by the river water slamming them against the riverbed.

"The force of that water pounds people into rocks and sends them over waterfalls," said Eric LaPrice, a <a href="https://www.fs.fed.us/">U.S. Forest Service</a> district ranger at the Giant Sequoia National Monument in central California.

At the Kern River in central California, officials last month updated a sign warning that that 280 people have died in it since 1968. The sign is already outdated, with four more drownings since then.

And in northern Utah, a 4-year-old girl playing at the side of the Provo River fell from a boulder into the water last month. Her mother and a man who was nearby jumped in to try to save the girl. All three drowned, illustrating how quickly one tragedy can multiply.

"As little as six inches of water can actually sweep an adult away at the rate of speed that the water is traveling," said Chris Crowley, emergency manager for the county where Park City is located.

--

By: <a href="mailto:dbeasley@earth.com">David Beasley, </a><a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Source: <a href="http://hosted.ap.org/dynamic/stories/U/US_RAGING_RIVERS_WEST_CAOL-?SITE=AP&amp;SECTION=HOME&amp;TEMPLATE=DEFAULT&amp;CTIME=2017-06-12-16-17-36">AP</a>

Melting snow causes deaths, swollen rivers in western U.S.

At least 14 people have died and officials have closed...

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.



<figure class="wp-block-embed aligncenter is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio"><div class="wp-block-embed__wrapper">
https://youtu.be/Ug657J67iEo?si=w96YjGMsg939LD_3
</div></figure>



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"]</div>



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="EjmSP20gQK-2593093-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"]</div>



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;



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="f8fukm28Vz-2491833-12187" type="single"]</div>



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



---



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...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0879czfG3k-1785905-12187" type="single"]</div>



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



---



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.

The rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"]</div>



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



---



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.

2022 illustrated the consequences of a warming climate

[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"] Today's Video of the Day from NASA...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JbW4VsY53O-1632195-12187" type="single"]</div>



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;



---



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.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

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



---



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.

Tiger sharks are shifting poleward as temperatures rise

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qARzJPSabQ-2270617-12187" type="single"]</div>



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;



---



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.

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="fxH3eJHEkQ-2010196-12187" type="single"]</div>



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



---



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.

Tracking changes in Earth's water cycle

[sendtonews key="fxH3eJHEkQ-2010196-12187" type="single"] Today’s Video of the Day from the...

Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

<div class="wp-block-sendtonews-playerselector">[sendtonews key="Ccjk8KEMzv-2550719-12187" type="single"]</div>



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;



---



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.

Mysterious "spoke season" captured on Saturn

[sendtonews key="Ccjk8KEMzv-2550719-12187" type="single"] Today's Video of the Day from NASA...

Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6SdlLLbt0t-1988946-12187" type="single"]</div>



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



---



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.

Plants help remove heavy metals from contaminated soil

[sendtonews key="6SdlLLbt0t-1988946-12187" type="single"] Today’s Video of the Day from NTU...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="gRpsplpwpe-2251464-12187" type="single"]</div>



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;



---



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.

Weeds are becoming increasingly resistant to herbicides

[sendtonews key="gRpsplpwpe-2251464-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="eAVLRk51oJ-1826888-12187" type="single"]</div>



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



---



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.

NASA monitors giant dust storms on Mars

[sendtonews key="eAVLRk51oJ-1826888-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="sFFhiK9OOn-1720418-12187" type="single"]</div>



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;



---



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.

Qeshm Island in the Strait of Hormuz

[sendtonews key="sFFhiK9OOn-1720418-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="yPSXGZek1I-2312529-12187" type="single"]</div>



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



---



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.

Inhambane Bay in southeast Mozambique

[sendtonews key="yPSXGZek1I-2312529-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="EPdZexVR30-1731237-12187" type="single"]</div>



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



---



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.

Kangerlussuaq Glacier on the Greenland ice sheet

[sendtonews key="EPdZexVR30-1731237-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="uwirCufwYv-2012371-12187" type="single"]</div>



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



---



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.

Ocean heat influences regional climate

[sendtonews key="uwirCufwYv-2012371-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JrMLDXHmjl-1911953-12187" type="single"]</div>



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



---



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

[sendtonews key="JrMLDXHmjl-1911953-12187" type="single"] Today’s Video of the Day from the...

News coming your way