When glaciers melt, they release water that carries sulfate-rich minerals previously trapped in the ice. This sulfate flows into streams and wetlands, increasing its concentration in watersheds.



As sulfate accumulates, it creates conditions that can trigger the production of toxic methylmercury, posing risks to ecosystems and wildlife.



Methylmercury, a potent neurotoxin, forms in waterlogged, sulfate-rich wetlands and enters water systems. It accumulates in fish, moves up the food chain to birds, and eventually reaches people who consume contaminated wildlife.



"Very little research has looked at methylmercury production in high-elevation wetlands," said Hannah Miller, a PhD student at <a href="https://www.colorado.edu/" target="_blank" rel="noreferrer noopener">CU Boulder</a> and lead author of a recent study.



"This leaves important knowledge gaps regarding how much is being produced in <a href="https://www.earth.com/news/glacier-melting-threatens-global-water-supplies-and-coastal-communities/" target="_blank" rel="noreferrer noopener">mountain</a> wetlands and how this may change with ongoing climate change."



<h2 class="wp-block-heading" id="h-how-mercury-turns-toxic-in-wetlands">How mercury turns toxic in wetlands</h2>



Methylmercury production from <a href="https://www.earth.com/news/melting-glaciers-are-reshaping-landscapes-and-national-borders-around-the-world/" target="_blank" rel="noreferrer noopener">glacier</a> melt sulfate only occurs within a specific range in wetland soils. If glacier-derived sulfate levels are too low, the conversion process doesn’t start; too high, and it stalls.



The ideal range - 0.60 to 1.4 milligrams per gram of dry soil - creates optimal conditions for mercury to transform into its toxic methylated form.



Miller’s team pinpointed this “Goldilocks zone” after testing soil from peatlands, alpine meadows, and riparian zones. Above the treeline, methylmercury levels barely budged. Below the treeline, peatlands pulsed with microbial activity, converting mercury to its toxic form.



"We also found in our experiment that moderate sulfate additions to the subalpine peatlands resulted in the greatest production of methylmercury within the soils," Miller said.



<h2 class="wp-block-heading" id="h-peatlands-as-mercury-hotspots">Peatlands as mercury hotspots</h2>



In the lab, Miller pumped different sulfate concentrations into soil samples. The response? Peatlands with moderate sulfate additions churned out the most methylmercury.



But there’s a catch. Wetlands above the treeline don’t have much vegetation. Fewer plants mean less carbon-rich material to feed the microbes that convert sulfate to methylmercury. But in the subalpine peatlands, dense vegetation and waterlogged soils create the perfect storm.



Sulfate-reducing bacteria thrive in these oxygen-starved <a href="https://www.earth.com/news/millions-could-run-out-of-water-if-glaciers-continue-to-melt/" target="_blank" rel="noreferrer noopener">environments</a>. They grab onto sulfate, munch through carbon, and churn out methylmercury as a byproduct. And as glaciers keep melting, more sulfate keeps coming.



<h2 class="wp-block-heading" id="h-melting-glaciers-spread-sulfate">Melting glaciers spread sulfate </h2>



Sulfate doesn’t stay put. It migrates downstream, riding currents and seeping into soils. In the past 30 years, sulfate levels in Boulder’s watershed have shot up by 200%. That spike mirrors a global pattern.



Glacier-fed streams in the Andes, Alps, and Himalayas show similar trends - up to a 2000% increase in sulfate concentrations. As these minerals flow, so does the risk of methylmercury contamination.



"It's a really interesting climate-driven signal that is starting to get more attention," Miller said. "And while increasing sulfate concentrations have direct implications for ecosystems, they can also have indirect impacts, including changing how mercury is transformed within wetlands."



<h2 class="wp-block-heading" id="h-mercury-moves-through-food-chains">Mercury moves through food chains</h2>



Methylmercury doesn’t just stay in the soil. It slips into <a href="https://www.earth.com/news/melting-glaciers-threaten-global-water-security/" target="_blank" rel="noreferrer noopener">water</a>, where fish absorb it through their gills. Small fish pass it to bigger fish. Birds swoop down, eat the fish, and the toxin moves up the food chain.



"In semi-arid mountain ecosystems, poorly developed soils and limited water bodies make it easy to think there is a lower risk for mercury contamination," noted Miller.



"But our findings show there is a risk, particularly in subalpine peatlands, and raise important questions about how this toxin may impact the communities and wildlife that rely on that water source now and in the future."



<h2 class="wp-block-heading" id="h-sulfate-isn-t-the-only-player">Sulfate isn’t the only player</h2>



Sulfate takes the spotlight, but it’s not alone. Iron, carbon, and water levels also play crucial roles in the methylmercury cycle.



In Boulder’s watershed, dry conditions could limit the spread of peatlands, reducing the areas where methylmercury thrives. But increased precipitation could do the opposite - more wetlands, more methylmercury.



Miller’s study also hints at the role of iron. Sulfate additions alone triggered methylmercury production, but iron concentrations could magnify or mitigate that effect.



<h2 class="wp-block-heading" id="h-melting-glaciers-rising-mercury-levels">Melting glaciers, rising mercury levels</h2>



Glaciers worldwide are melting, releasing sulfate-rich minerals into nearby streams and wetlands. This surge in sulfate is not limited to Boulder but is occurring in mountain watersheds globally. 



As sulfate levels rise, so does the risk of toxic methylmercury formation, impacting ecosystems far beyond Colorado.



Glacial melt in Peru’s Andes has turned once-pristine wetlands into mercury-contaminated hotspots. The European Alps and the Himalayas face similar risks as warming temperatures increase sulfate runoff. 



As glaciers recede, more sulfate spills into wetlands, driving methylmercury production and threatening ecosystems globally.



<h2 class="wp-block-heading" id="h-controlling-mercury-in-wetlands">Controlling mercury in wetlands</h2>



Monitoring sulfate is one thing. Mitigating its impact is another. Restoring wetlands, managing runoff, and regulating upstream mining could reduce sulfate flow. But Miller and her team aren’t stopping there.



"This research is timely, given the confluence of global changes, including climate warming, changes in the supply of reactive elements, and the occurrence of wildfires that are threatening sensitive high-elevation ecosystems," said Eve-Lyn Hinckley, co-author and CIRES Fellow.



Glaciers keep melting, releasing more sulfate into streams and wetlands. This ongoing process fuels methylmercury production, posing increasing risks to ecosystems. 



The outcome hinges on monitoring efforts and proactive intervention to manage these toxic threats.



The study is published in the journal <a href="https://iopscience.iop.org/article/10.1088/1748-9326/add8a5" target="_blank" rel="noreferrer noopener">Environmental Research Letters</a>.



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Mountain wetlands are turning into mercury hotspots

When glaciers melt, they release water that carries sulfate-rich minerals previously trapped in the ice. This sulfate flows into streams and wetlands, increasing its concentration in watersheds. As sulfate accumulates, it creates conditions that can trigger the production of toxic methylmercury, posing risks to ecosystems and wildlife. Methylmercury, a potent neurotoxin, forms in waterlogged, sulfate-rich wetlands and enters water systems. It accumulates in fish, moves up the food chain to birds, and eventually reaches people who consume contaminated wildlife. "Very little research has looked at methylmercury production...

Biofuels are often proposed as a solution to help reduce fossil fuel emissions and combat climate change. But while renewable energy is important for future climate change mitigation, a new study shows that expanding the production of crops like oil palm and corn could have drastic consequences on <a href="https://www.earth.com/news/biodiversity-key-measure-success/">biodiversity</a>. 

Researchers from <a href="https://www.dur.ac.uk/">Durham University</a>, the <a href="http://www.bik-f.de/root/index.php?page_id=57">Senckenberg Biodiversity and Climate Research Centre</a> and the <a href="https://www.tum.de/en/">Technical University of Munich</a> found that setting aside large amounts of land for bioenergy crops could be just as harmful to vertebrate biodiversity as climate change. 

The study was published in the journal Proceedings of the National Academy of Sciences.

Climate change, habitat degradation, and human activities have already caused sharp declines in biodiversity and studies have shown that we are in the midst of a <a href="https://www.earth.com/news/warning-imminent-mass-extinction/">sixth mass extinction</a>. 

If bioenergy crops pose a threat to global biodiversity, then it’s crucial for researchers and policymakers to consider these risks before investing in biofuel production.

“We found that the combination of climate change and large-scale expansion of bioenergy crops would together threaten about 36% of the habitats of all global vertebrate species, including many that are already the subject of significant conservation work,” said Stephen Willis, an author of the study. “While bioenergy is clearly an important tool for climate change mitigation, the potential impacts on biodiversity must not be ignored.”

For the study, the researchers compared to two climate scenarios. One scenario projected warming of 1.5 degrees Celsius by 2100 with biofuels being used to their fullest extent, and the second scenario had warming of three degrees by 2100 but very little biofuel use. 

While the first scenario had less warming, the researchers discovered that even expanding bioenergy crop production would not be enough to compensate for the losses in biodiversity. 

The researchers found that expanded bioenergy crop production under the first scenario would result in significant species declines.

For example, the hedgehog could undergo 44 percent population loss, the red squirrel would experience 46 percent population loss, and the common starling would suffer 15 percent population loss.

[caption id="attachment_1863682" align="aligncenter" width="700"]<a href="https://www.earth.com/wp-content/uploads/2018/12/Biodiversity-could-suffer-if-bioenergy-crop-production-grows.jpeg"><img class="wp-image-1863682" src="https://www.earth.com/wp-content/uploads/2018/12/Biodiversity-could-suffer-if-bioenergy-crop-production-grows-1024x768.jpeg" alt="" width="700" height="525" /></a> Hedgehog, Image Credit: Professor Stephen Willis, Durham University[/caption]

Bioenergy crop production is already impacting biodiversity across the world with oil palm plantations damaging local ecosystems in tropical regions, and expanding corn production in temperate regions leading to habitat declines for birds and other farmland mammals. 

The study shows that biodiversity needs to be considered in the bioenergy discussion and other alternatives for reducing emissions must be found. 

“A strong reliance on bioenergy to combat climate change could result in outcomes for biodiversity that are little better than would occur if we didn't implement bioenergy strategies, despite the consequent climate change implications,” said Willis. “Instead, we should be thinking about how to swiftly and significantly reduce energy consumption if biodiversity is to be protected.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer 

Image Credit: Christian Hof

Paid for by Earth.com

Biodiversity could suffer if bioenergy crop production grows

Biofuels are often proposed as a solution to help reduce...

A new study from the <a href="https://www.wisc.edu/">University of Wisconsin-Madison</a> has revealed that, in a matter of just two centuries, humans have managed to reverse a cooling trend that lasted 50 million years. 

By 2030, the experts predict that Earth's climate will resemble that of the mid-Pliocene three million years ago. If harmful <a href="http://www.earth.com/news/meat-dairy-production-emissions/">greenhouse gas emissions</a> continue at the current rate, the climate in 2150 will resemble the Eocene period, which was an ice-free epoch 50 million years ago. 

“If we think about the future in terms of the past, where we are going is uncharted territory for human society,” said study lead author Kevin Burke. “We are moving toward very dramatic changes over an extremely rapid time frame, reversing a planetary cooling trend in a matter of centuries.”

While all of the species on the planet today are derived from an ancestor that survived the Eocene and the Pliocene, it is unclear whether modern species could adapt to these extreme conditions. The rate of climate change we are experiencing now is believed to be faster than anything that has occurred before. 

At the time of the Eocene, global temperatures averaged 13 degrees Celsius warmer than they are today. Swampy forests like those in the southern United States could be found in the Arctic and the first mammals were emerging. During the Pliocene, the climate was dry and temperatures averaged up to 3.6 degrees Celsius warmer.


The conditions during these and other geological periods became the focus of the current study. For the investigation, the researchers also used several climate models and two future climate scenarios: Representative Concentration Pathway 8.5 (RCP8.5), which represents a climate that results from unchecked greenhouse gas emissions, and RCP4.5, a scenario in which emissions are moderately reduced.

Under both scenarios and across each model, the Earth's climate most closely resembled the mid-Pliocene by 2030 and the Eocene by 2150. The climates appeared to shift from the center of continents and then expanded outward over time.


Study co-author and paleontologist John Williams is a professor of Geography at UW-Madison.

“The further we move from the Holocene, the greater the potential that we move out of safe operating space,” said Professor Williams. 

“In the roughly 20 to 25 years I have been working in the field, we have gone from expecting climate change to happen, to detecting the effects, and now, we are seeing that it's causing harm. People are dying, property is being damaged, we're seeing intensified fires and intensified storms that can be attributed to climate change. There is more energy in the climate system, leading to more intense events.”

The study is published in the journal <a href="http://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Paid for by <a href="http://earth.com">Earth.com</a>

Earth’s 50 million year cooling trend has been reversed by humans

A new study from the University of Wisconsin-Madison has revealed...

Scientists at the <a href="https://deepcarbon.net/about/about-dco">Deep Carbon Observatory</a> (DCO) have found that the amount of carbon stored deep within the Earth's subsurface is 245 to 385 times greater than the carbon mass of all humans on the surface. The international study, which has been ongoing for the last ten years, is also revealing what types of life are able to live in the deep biosphere with its extreme temperatures and low nutrient availability. 

The team drilled 2.5 kilometers into the <a href="http://www.earth.com/news/arctic-ocean-seafloor/">seafloor</a> and accessed continental mines and boreholes more than 5 kilometers deep, collecting samples of the microbes that reside at these depths. Overall, hundreds of sites were probed for the investigation.

The experts determined that the size of the deep biosphere is 2 to 2.3 billion cubic kilometers, which is almost twice the volume of all the oceans. They also found that the carbon mass of life deep in the planet's innermost surface is 15 to 23 billion tons.

The researchers compared this deep biosphere to a “subterranean Galapagos” that includes members of all three domains of life: bacteria, archaea, and eukarya. There are millions of types of bacteria and archaea, which dominate deep Earth, and most of them are yet to be discovered or characterized.

[caption id="attachment_1863647" align="aligncenter" width="700"]<a href="https://www.earth.com/wp-content/uploads/2018/12/bacteria.png"><img class="wp-image-1863647" src="https://www.earth.com/wp-content/uploads/2018/12/bacteria-1024x764.png" alt="" width="700" height="522" /></a> Methanobacterium found in samples from a buried coal bed 2 km below the Pacific Ocean. Image Credit: Hiroyuki Imachi (Japan Agency for Marine-Earth Science and Technology (JAMSTEC)[/caption]

The scientists discovered that the genetic diversity of life below the surface is comparable to or exceeds that above the surface. Deep microbes are often very different from those on the surface, with life cycles on near-geologic timescales. In some cases, these mechanisms survive on nothing more than energy from rocks.

Mitch Sogin of the Marine Biological Laboratory Woods Hole is the co-chair of DCO's Deep Life community, which is comprised of more than 300 researchers in 34 countries.

“Exploring the deep subsurface is akin to exploring the Amazon rainforest. There is life everywhere, and everywhere there's an awe-inspiring abundance of unexpected and unusual organisms,” said Sogin.

“Molecular studies raise the likelihood that microbial dark matter is much more diverse than what we currently know it to be, and the deepest branching lineages challenge the three-domain concept introduced by Carl Woese in 1977. Perhaps we are approaching a nexus where the earliest possible branching patterns might be accessible through deep life investigation.”

Study co-author Rick Colwell of Oregon State University added, “Our studies of deep biosphere microbes have produced much new knowledge, but also a realization and far greater appreciation of how much we have yet to learn about subsurface life.”

“For example, scientists do not yet know all the ways in which deep subsurface life affects surface life and vice versa. And, for now, we can only marvel at the nature of the metabolisms that allow life to survive under the extremely impoverished and forbidding conditions for life in deep Earth.”

The research was presented at the annual meeting of the American Geophysical Union.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 
Image Credit: Gaetan Borgonie, Extreme Life Isyensya, Belgium

A massive amount of life exists deep down within Earth’s subsurface

Scientists at the Deep Carbon Observatory (DCO) have found that...

In 1964, what later became known as the Great Alaskan Earthquake of 1964 tore into the northernmost US state.  The earthquake only lasted about 4 minutes but was the second longest recorded earthquake in the world, after one recorded in Chile in 1960, according to the <a href="https://earthquake.alaska.edu/earthquakes/notable/1964-m92-great-alaskan-earthquake">Alaska Earthquake Center</a>.  

In that brief 4 minutes, the Great Alaskan Earthquake reached a magnitude of 9.2, according to <a href="https://www.ncei.noaa.gov/news/great-alaska-earthquake">NOAA</a>.  The earthquake triggered a tsunami that hit the coast of Alaska with waves measured up to fifty feet high in places.  All told, 139 people died and 124 of those people were killed by the tsunami. The number of lives lost would likely have been even more if the earthquake had hit a part of the US with a greater population density.  

<a href="https://www.history.com/topics/natural-disasters-and-environment/1964-alaska-earthquake">History.com</a> reports that witnesses remembered hearing crunching, grinding noises as asphalt rose and fell like ocean waves.  Sewer and gas lines were broken, electricity was interrupted. Landslides were triggered, in one area taking 75 homes with the moving earth.  Residual water movement was reported as far away as Australia. It was said that the tip of the Space Needle in Seattle Washington wobbled from the earthquake.      

The coast of Alaska was forever changed.  I’ve seen places where sharp cliffs were created on Alaskan offshore islands showing the displacement of where the coast is now compared to where it was.  On Middleton Island, a ship that was once sunk just offshore now lies on its side on a patch of dry nest where its rotting remains house hundreds of nesting seabirds in its cavernous hold.  Some coastal forests were dropped below the sea and drowned in the ocean waters. 

It was the danger of future earthquakes like the 1964 earthquake in Alaska that drove the creation of FEMA’s <a href="https://www.fema.gov/national-earthquake-hazards-reduction-program">National Earthquake Hazards Reduction Program</a> (NEHRP) and a stricter building code in Alaska.  Alaska itself is especially prone to quakes, averaging 40,000 earthquakes a year, with bigger quakes than the rest of the US combined.  NEHRP was established by Congress in 1974, directing that four national agencies coordinate their work on earthquakes to be complimentary. 

Research carried out by the <a href="https://www.nist.gov/">National Institute of Standards and Technology</a> (NIST), the <a href="https://www.nsf.gov/">National Science Foundation</a> (NSF) and the <a href="https://www.usgs.gov/">U.S. Geological Survey</a> (USGS) would be used by other agencies to reduce earthquake hazards.  Implementation and development of earthquake programs would be shared by some of these agencies as well as FEMA.  Congress also allowed federal funding specifically for the reduction of earthquake hazards. It seems that despite such a bill being passed, we’re often doomed to repeat history; it’s just blind luck when the repetition isn’t as bad.

At 8:29 am, on November 30, 2018, another earthquake hit Alaska seven miles north of Anchorage.  This earthquake was only a magnitude 7 quake. Gas and water lines were broken, roads were torn apart but no fatalities were reported.  <a href="https://www.cnn.com/2018/12/05/us/alaska-earthquake-road-repair-trnd/index.html">CNN</a> reports that inspectors have been looking at 243 bridges in the area but have yet to find structural damage to any.  The <a href="https://earthquake.alaska.edu/earthquakes/recent_list">Alaskan Earthquake Center</a>, out of the <a href="https://www.uaf.edu/">University of Fairbanks</a>, has a long list of recent earthquakes over the last few days.  Most of the quakes are minor, being in the 1-2 range but a few have reached magnitudes of 3 or 4, including a 4.8 magnitude quake 9 miles from Anchorage.  The timing of these earthquakes happens to come just after a bill to re-authorize NEHRP was passed from Congress to President Trump to be signed into law on the 29th of November.

The <a href="https://www.congress.gov/bill/115th-congress/senate-bill/1768">bill S.1768</a> was sponsored by Democrat Dianne Feinstein from California but also Republican senator Lisa Murkowski of Alaska.  The bill authorizes Congress to spend millions on earthquake programs, including funding for a USGS alert system. The last authorization for NEHRP expired in 2009 and funding has come in bits and pieces as short term bills have funded earthquake programs.  A fortunate inclusion in the bill is funding for tsunami preparedness, which bolsters Alaska, where a tsunami is likely to be more dangerous than an earthquake itself. The small amount of damage from the November 30 earthquake and smaller following quakes is due partly to the lack of a tsunami but also to preparedness.

The US Geological Survey (USGS) has already rolled out a prototype for its earthquake alert system.  <a href="https://www.shakealert.org/implementation/shakealert-phase-1/">Shake Alert</a>, started phase 1 of its operation this fall.  The system currently serves California, Oregon and Washington.  Commercial and institutional uses already can use the system in a small way.  The early warning system relies on traditional seismometers to measure small seismic activity across the west coast and create a warning.  The next phase of the system should alert people to level 5 seismic activity. The USGS is already partnering with cell phone carriers and other mass alert systems to reach as many people as possible with early earthquake warnings.  So far, the system leaves out Alaska and the state already so far apart from the rest of the US must fend for itself. 

<a href="https://www.adn.com/alaska-news/2018/12/01/experts-alaska-quake-damage-could-have-been-much-worse/">Anchorage Daily News</a> reported that strict building codes kept earthquake damage to a minimum.  Alaska and California have the hardest rules for building to withstand earthquakes.  Anchorage has a population of around 300,000 large enough that an earthquake of the size that hit at the end of November could’ve caused much bigger problems.  Alaska’s largest hospital initiated an incident command center but few people showed up with injury. About 50 sites showed road damage, but <a href="https://www.cnn.com/2018/12/05/us/alaska-earthquake-road-repair-trnd/index.html">CNN</a> reported that some of the roads are already repaired, partly thanks to federal dollars.  We can learn a lot from Alaska’s preparedness. 

If Trump signs reauthorization of NEHRP into law, prevention rather than reaction will become the law.  Much work can still be done to include Alaska, the state with the most earthquakes, into the federal earthquake program.  We can also look to Alaska as a good example of disaster preparedness in general. 

--

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="http://earth.com">Earth.com</a> Contributing Writer

Alaska earthquake highlights the importance of being ready

In 1964, what later became known as the Great Alaskan...

The ground above Tehran’s exorbitant groundwater basins is sinking. Unregulated groundwater basins and government-funded dams have been built in response to Iran’s water crisis. And in Tehran alone, the number of wells has increased from 4,000 in 1968 to more than 32,000 in 2012. 

However, these man-made structures have caused shrinkage in Lake Urmia, desertification, massive sandstorms, and groundwater levels to drop twelve meters in half a century. As a result, Tehran is sinking about 25 centimeters every year.

Mahdi Motagh and Mahmud Haghshenas Haghighi from the Remote Sensing Section of the <a href="https://www.gfz-potsdam.de/en/home/">GFZ German Research Centre for Geosciences</a> in Potsdam came to this conclusion using data from four satellite systems. Their findings, published in the journal <a href="https://www.journals.elsevier.com/remote-sensing-of-environment">Remote Sensing of Environment</a>, showed that three separate regions of Tehran sank more than 25 centimeters each year between 2003 and 2017 — which, in total, added up to several meters.

Motagh and Haghshenas Haghighi used InSAR (Interferometric Synthetic Aperture Radar) to come to their conclusion. InSAR uses high-precision radar signals in the microwave range recorded by satellites to create images of Earth’s surface topography. The researchers used nine data InSAR data sets collected between 2003 and 2017 to see the short- and long-term effects of <a href="http://www.earth.com/news/groundwater-depletion-carbon-dioxide/">groundwater</a> levels on Earth’s surface.

Tehran’s sinkage has caused cracks in buildings and crevices in the ground. Furthermore, Haghshenas Haghighi and Motagh note that several groundwater basins have been irreversibly damaged by the sinkage and will not be able to store as much water as before.

The discovery of Tehran’s sinking should lead Iranian government officials to explore scientifically sound and sustainable ways of water storage and management. Motagh and Haghshenas Haghighi plan to use the same data analyzation method to explore the sinkage outside of Tehran in the future.

--

By <a href="mailto:oliviagharvey24@gmail.com">Olivia Harvey</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

Tehran continues to sink at a dangerous speed

The ground above Tehran’s exorbitant groundwater basins is sinking. Unregulated...

In an effort to clean up Beijing’s smog problem caused by exhaust fumes and coal fires, the Chinese government has introduced emission-free solar power and plans to explore more photovoltaic systems in the future. However, the presence of smog negatively affects <a href="http://www.earth.com/news/harnessing-solar-power/">solar power</a> by way of reducing the amount of solar radiation hitting the ground, thus weakening the power output of existing photovoltaic systems.

According to the <a href="https://www.who.int/">World Health Organization</a>, smog causes 1.6 million premature deaths in China each year and 7 million premature deaths worldwide. Major air pollution can cause lung disease, stroke, and/or heart attacks. These staggering numbers show that reducing smog and employing a cleaner energy solution is vital.

Mercè Labordena and her colleagues from the <a href="http://www.cp.ethz.ch/">Climate Policy group at ETH Zurich</a> produced a study, published in the journal <a href="https://journals.plos.org/plosone/">PLOS ONE</a>, showing how China’s power industry could transform via solar energy if, and only if, all smog-causing emissions are eliminated.

Labordena’s study found that China could produce an additional 85 to 158 terawatt hours of electricity per year by 2040 with current and future photovoltaic systems. Furthermore, China’s electricity industry could pull in an extra 10.1 billion U.S. dollars from solar power. But this is only possible if the government puts the kibosh on all household, industry, transportation, and power emissions. Solar radiation would have to increase by a countrywide average 11% to achieve the above calculations.

This seems like a challenging and expensive feat. However, Labordena and her team found that 13% to 17% of the cost for employing best-practice emission standards in China would be earned back by high-functioning photovoltaic systems. Investors would see a quick turn around, Labordena said.

Improved public health, aiding the fight against global warming, and an increase in industry revenue should all be eye-catching initiatives for Chinese and other government officials in countries where smog is a huge problem. Based on Labordena’s study, reducing smog is a win-win situation for everyone involved.

--

By <a href="mailto:oliviagharvey24@gmail.com">Olivia Harvey</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

Battling smog can also increase solar power generation

In an effort to clean up Beijing’s smog problem caused...

The Carr Fire caused widespread devastation in Redding, California in July 2018, and was the <a href="https://www.earth.com/news/carr-fire-california/">seventh most destructive wildfire</a> in California’s history. 

Eight people lost their lives in the fire, and over 200,000 acres were destroyed. 

The Carr Fire was accelerated by a massive “firenado" or fire-generated vortex that towered 17,000 feet above the Earth and had the same spinning power as a class three tornado. 

In a new paper, atmospheric scientist Neil Lareau discovered the perfect combination of factors that created the catalyst for the fire vortex, a rarely observed phenomenon in wildfires. 

The only other documented case of a firenado was in 2003 during the Canberra Firestorm in Australia.  

It was a matter of being in the right place at the right time, according to Lareau's research, the findings of which were published in the journal Geophysical Research Letters. 

“This paints a clear picture of the sequence of events leading to the vortex development and intensification,” said Lareau. “This sequence suggests the Carr Fire vortex may qualify as pyro-genetic tornado, and not merely a tornado-strength fire-generated vortex.”

Laureau reviewed satellite and radar data from the <a href="https://radar.weather.gov/">National Weather Service NEXRAD radars</a>. This is the first time that NEXRAD radars captured the development and structure of the fire vortex which provided key insights into how the vortex formed. 

The radar data revealed that the vortex was formed along the perimeter of the Carr Fire and within a region of wind shear. 

A vertical plume of convective heat grew from four to eight miles high in 15 minutes. The plume’s growth was driven by the sudden formation of a pyro-cumulonimbus cloud which is an ice-topped cloud generated by a fire. 

In this case, the cloud was 39,000 feet in the air which helped columns of air underneath the cloud stretch and rotate eventually forming wind speeds of 143 miles per hour in a concentrated area near the surface of the Earth. 

An unusually warm and dry July along with low atmospheric pressure and wind shear that developed before the vortex all created the perfect catalysts for the firenado, according to Lareau. 

“With the impacts from this fire, a discussion and studies are warranted about the potential to warn for future tornado-strength vortices,” said Lareau. “In this case, the availability of high-resolution radar and satellite observations provide advance indications for vortex formation such that watches, or even warnings, may have been possible.”

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="mailto:kayvandette@gmail.com">Earth.com</a> Staff Writer 

Image Credit: CalFire

Deadly firenado in Carr Fire caused by a perfect storm of factors

The Carr Fire caused widespread devastation in Redding, California in...

A new study from <a href="https://www.yale.edu/">Yale University</a> is revealing how much wild animals can affect the capacity of a region to store carbon. According to the researchers, the ability of a landscape to absorb, release, or transport <a href="http://www.earth.com/news/global-co2-emissions-2018/">carbon</a> is greatly influenced by the presence of wild animals.

After reviewing a collection of research, the experts determined that animals can increase or decrease rates of biogeochemical processes by 15 to 250 percent or more. The researchers argue that failure to account for the role of animals can undermine the accuracy of ecosystem carbon budget estimates. 

Study lead author Oswald J. Schmitz is the Oastler Professor of Population and Community Ecology at the Yale School of Forestry &amp; Environmental Studies. 

“Some of us have been saying for a long time that it's not just animal abundance that matters but what these animals do that is important,” said Schmitz. “We're finally to the point that there's some pretty strong evidence to support these ideas.”

Previous studies have demonstrated that animal abundance can cause major shifts in the carbon storage capacity of ecosystems. In some cases, an ecosystem transitioned from a significant source of carbon emissions when animals were not abundant to a carbon sink when animal populations were restored.

Large mammals play critical roles in the vitality of tropical forests through activities such as seed dispersal by frugivores and the support of plant production by herbivores. One particular study found that a 3.5-fold increase in the number of mammal species can increase carbon retention by 230 to 400 percent.


In other ecosystems, however, grazing herbivores can be detrimental to the landscape's carbon storage capacity. For example, an abundance of caribou and muskox in the Arctic or moose in boreal forests can decrease CO2 uptake and storage by up to 70 percent.

Human activities such as poaching and overfishing are increasingly affecting these relationships. Study co-author Professor Chris Wilmers explained that humans have played a huge role in shaping animal communities, from the composition of species to the distances, directions, and speeds at which they move across landscapes.

“If we want to understand how our impacts on and/or management of animal populations scale up to influence ecosystem wide carbon cycling then we need tools that allow us to link the things animals do to their ultimate consequences on the carbon cycle,” said Professor Wilmers.

The researchers offered insights into how researchers could combine animal ecology, ecosystem modeling, and remote sensing to more accurately predict and manage carbon cycling across ecosystems. 

Study co-author Scott Goetz is a professor at Northern Arizona University who has conducted satellite remote sensing research for more than three decades.

“We show the effects of animals are large and important, but also that remote sensing can greatly inform what we know about how animals alter ecosystems through time, whether appropriating biomass through herbivory or trampling or enhancing productivity through nutrient and seed dispersal,” said Professor Goetz.

“New remote sensing technology, like the GEDI Lidar instrument launched this week to the International Space Station, will help us do a much better job of capturing the influence of animals on plant biomass and productivity dynamics.”

The study is published in the journal <a href="http://science.sciencemag.org/">Science</a>.

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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

Animals impact an ecosystem’s ability to store carbon

A new study from Yale University is revealing how much...

A new study is calling into question everything we thought we knew about volcanic eruptions. 

It’s long been assumed that large chambers of magma located deep within the Earth are what drive eruptions, and this magma is turned to lava as it spews out of the mouth of a volcano.

However, researchers from<a href="https://www.imperial.ac.uk/"> Imperial College London</a> and the <a href="http://www.bristol.ac.uk/">University of Bristol</a> are challenging this fundamental theory and instead suggest that volcanoes are fed by mush reservoirs <a href="https://www.earth.com/news/crystals-magma-forecast-eruptions/">made up of crystals</a> with small magma pockets. 

A study detailing their findings and reasoning behind the new hypothesis was published in the journal Nature. 

“We now need to look again at how and why eruptions occur from mush reservoirs,” said Matthew Jackson, the lead author of the study. “We can apply our findings to understanding volcanic eruptions with implications for public safety and also to understand the formation of metal ore deposits associated with volcanic systems.”

This is not the first time the mush reservoir model has been proposed, but previous models were not able to explain why magma contains so few crystals or old crystals if the eruption is fed from underground reservoirs filled with mostly solid crystal. 

The researchers were able to solve this problem with a more sophisticated mush reservoir model that showed how magma is less dense than the crystals and can spring up from small spaces between the crystals. 

“The new idea developed by geologists at Imperial and Bristol is that molten rock forms within largely crystalline hot rocks, spending most of its time in little pores within the rock rather than in large magma chambers,” said Stephen Sparks, the co-author of the study. “However, the rock melt is slowly squeezed out to form pools of melt, which can then erupt or form ephemeral magma chambers.”

The study helps explain some of the biggest mysteries of volcanic eruptions and completely contradicts everything we have come to know about magma chambers. 
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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com </a>Staff Writer

Volcanoes may be driven by “mush” reservoirs, not magma chambers

A new study is calling into question everything we thought...

Approximately 187 million years before dinosaurs were wiped out, the largest mass extinction in the history of the planet took place. Researchers at the <a href="https://www.washington.edu/">University of Washington</a> and Stanford University may have just solved the mystery of what caused the “Great Dying.” Their study reveals that the mass extinction was triggered by <a href="http://www.earth.com/news/global-warming-industrial-revolution/">global warming</a>, which left marine animals unable to breathe. 

Also known as the Permian extinction, the event killed off 96 percent of all plants and animals. Ancient fossils from the seafloor show a thriving and diverse marine ecosystem, followed by a layer of corpses. 

Prior to this study, scientists had long debated what exactly caused the oceans to become so toxic. Experts theorized that the inhospitable conditions may have resulted from the high acidity of the water, metal and sulfide poisoning, a complete lack of oxygen, or simply higher temperatures.

For the current investigation, the researchers combined models of ocean conditions and animal metabolism with published lab data and paleoceanographic records. They determined that the metabolism of the animals sped up as the temperatures rose, and the warmer waters could not hold enough oxygen for them to survive.

“This is the first time that we have made a mechanistic prediction about what caused the extinction that can be directly tested with the fossil record, which then allows us to make predictions about the causes of extinction in the future,” said study first author Justin Penn.


The global warming experienced during the Great Dying was initiated by a series of massive volcanic eruptions in Siberia. When the researchers ran a climate model based on the conditions of the Earth during the Permian, they determined that the oceans had temperatures and oxygen levels similar to those found on our planet today. 

“Under a business-as-usual emissions scenarios, by 2100 warming in the upper ocean will have approached 20 percent of warming in the late Permian, and by the year 2300 it will reach between 35 and 50 percent,” said Penn. “This study highlights the potential for a mass extinction arising from a similar mechanism under anthropogenic climate change.”

The study is published in the journal <a href="http://science.sciencemag.org/">Science</a>.

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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 

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The Earth’s deadliest mass extinction was caused by global warming

Approximately 187 million years before dinosaurs were wiped out, the...

Experts led by the <a href="https://www.usc.edu/">University of Southern California</a> have evaluated the cost-benefit methods used by the Trump administration to justify a proposal to roll back <a href="http://www.earth.com/news/epa-rollback-emissions-standards/">fuel economy standards</a>. The researchers not only found that the new legislation will do more harm than good, but also discovered that the government analysis was not properly conducted. 

“It appears federal officials cherry-picked data to support a predetermined conclusion that the clean-car standards will lead to too many highway deaths,” said study lead author Professor Antonio Bento. “We do not support that conclusion and the data does not support that conclusion.”

In 2007, Congress adopted laws to require the corporate average fuel economy (CAFE) to increase to 35 mpg by 2020. A midterm review conducted in 2016 found that the benefits of these changes would be greater than the costs and that the measures would be technologically feasible.

Just two years later, federal agencies announced plans to freeze CAFE standards at 2021 levels through 2025. They argued that forcing automakers to make the necessary changes so quickly would lead to cars that are too expensive and that this would keep too many old vehicles on the road that are not safe.

The authors of the current study, who are among the world's top experts in environmental economics and climate change, were puzzled by the proposal and wanted to conduct an independent assessment.

The team's findings, which will be presented to automakers and policymakers at the Organization for Economic Cooperation and Development (OECD) in Paris this week, confirm the results of previous research which concluded that the benefits for fuel-efficient vehicles outweigh the costs.

Professor Bento said the study represents a “rapid assessment policy response” to the controversial regulatory proposal. According to the researchers, the results of the investigation suggest that flaws in the government's analysis may have been a deliberate attempt to manipulate statistics and mislead people.

Ironically, Professor Bento happens to be the economist most often cited in the documents the EPA used to make its case for the regulatory relaxation.

“It's doubtful these miscalculations were inadvertent,” said Professor Bento. “These are not mistakes, rather these are deliberate downsizing of benefits and inflating costs.”


The study is published in the journal <a href="http://science.sciencemag.org/">Science</a>.

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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 

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Proposed changes to fuel economy standards based on flawed analysis

Experts led by the University of Southern California have evaluated...

Multiple news sources, including <a href="https://www.nytimes.com/">The New York Times</a>, are reporting that the Trump administration is preparing to weaken the regulations for new coal-fired power plants, which were established under the Obama administration to fight <a href="http://www.earth.com/news/majority-republicans-climate-change/">climate change</a>. The proposal will eliminate the requirement for coal plants to be built with technology to capture and store carbon. This is a move that would make the development of new coal-fired power plants more feasible.  

The announcement is expected to come from the <a href="https://www.epa.gov/">Environmental Protection Agency</a> (EPA) on Thursday, and it seems like no coincidence that the declaration will coincide with COP24, the climate summit that has brought together representatives from nearly 200 countries in Poland to discuss guidelines for cutting fossil fuel emissions. 

At the G-20 meeting in Argentina last week, 19 of 20 attending leaders signed an official statement reaffirming their commitment to fight global warming, but President Trump insisted on signing a separate statement. The clause declared that the United States “reiterates its decision to withdraw from the Paris Agreement, and affirms its strong commitment to economic growth and energy access and security, utilizing all energy sources and technologies, while protecting the environment.”

If it was not already obvious that many powerful leaders in the United States government support the coal industry, the message has now been made abundantly clear. Last month, President Trump said that he will nominate acting EPA administrator Andrew Wheeler, who is a former coal industry lobbyist, to hold the position permanently. 

According to a report by the Energy Information Administration, coal consumption is set to be the lowest since 1979 this year, as a near-record number of coal plants have shut down. 

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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

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Trump’s EPA moving to weaken regulations for building coal plants

Multiple news sources, including The New York Times, are reporting...

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



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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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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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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 



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Lesotho: Africa's "Kingdom in the Sky"

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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



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Wetlands are a major source of methane emissions

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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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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



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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



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

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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



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

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

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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



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

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

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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



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

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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



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

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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



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

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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



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

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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



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

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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



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

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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



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

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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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