A new study has found that, contrary to previous claims, the ocean is not a significant source of microplastics to the atmosphere, but rather a major sink.&nbsp;



The research team used a global chemical transport model to evaluate how tiny plastic particles, known as microplastics, move around the world. 



The finding challenges past assumptions about the ocean’s role in releasing plastic fragments into the air.



<h2 class="wp-block-heading" id="h-the-journey-of-airborne-microplastics-nbsp">The journey of airborne microplastics&nbsp;</h2>



Plastic debris in dust form is increasingly recognized as a worldwide contaminant. <a href="https://www.earth.com/news/microplastics-in-the-brain-alarming-new-details-revealed/" target="_blank" rel="noreferrer noopener">Microplastics</a> (particles less than 5 mm in diameter) have been detected in soils, freshwater, the ocean, and even in the air that we breathe.&nbsp;



Scientists warn that microscopic plastic bits pose risks for human health, since they can easily enter the respiratory system and the bloodstream.&nbsp;



Once airborne, these tiny pieces can travel large distances and eventually settle in remote or sensitive regions, harming wildlife and potentially impacting human populations.



But how do these particles enter the atmosphere in the first place? The planet’s primary sources of microplastics are typically found on land, from everyday materials such as vehicle tires shedding particles on roads, or synthetic clothing fibers washed out in domestic wastewater.&nbsp;



However, earlier models had suggested that there might be an additional large source at sea. Microplastics often accumulate in the <a href="https://www.earth.com/news/microplastics-pose-a-greater-threat-to-some-ocean-animals/" target="_blank" rel="noreferrer noopener">oceans</a>, carried there by rivers and other waterways. Then, once present in the marine environment, it was believed that they could be lofted into the air by sea spray or wind-driven wave action.



<h2 class="wp-block-heading" id="h-what-is-the-ocean-s-contribution">What is the ocean's contribution?</h2>



Prior reports pointing to a large marine source relied on an inverse modeling technique. That method uses atmospheric measurements of particular substances and attempts to infer their origin by matching observed concentrations with predicted distributions.&nbsp;



Applied to microplastics, inverse modeling suggested the ocean might contribute hundreds of millions - or even billions - of kilograms of these fragments to the air each year.



Such massive figures were then tested experimentally, with scientists using wave tanks and other controlled setups to see how vigorously wave action or bursting bubbles could transfer plastics from the water surface into the atmosphere.&nbsp;



Those studies, however, hinted that only tens or hundreds of thousands of kilograms of plastic might plausibly be introduced into the air - orders of magnitude smaller than the figures derived from inverse modeling.



<h2 class="wp-block-heading" id="h-a-global-chemical-transport-model">A global chemical transport model</h2>



In an effort to reconcile these contradictory outcomes, a group led by researchers at the <a href="https://mpimet.mpg.de/en/homepage" target="_blank" rel="noreferrer noopener">Max Planck Institute for Meteorology</a> (MPI-M) ran a global chemical transport model. This computer model simulates the movement of substances, such as microplastic particles, through the atmosphere.&nbsp;



By prescribing a minor oceanic emission of microplastics - consistent with the low estimates from laboratory work - they were able to predict how microplastic concentrations should appear in the air at various locations around the globe.



The results aligned well with real-world measurements. Based on the model, the ocean in fact took up some of these airborne particles instead of emitting them in large quantities.&nbsp;



The scientists learned that rather than being a source, the ocean appeared to be a sink, in which 15 percent of all airborne microplastics are deposited.&nbsp;



In other words, waves, spray, and wind may occasionally lift small amounts of plastic out of the sea, but far more of the material is settling onto the water rather than emanating from it.



<h2 class="wp-block-heading" id="h-how-airborne-microplastics-travel">How airborne microplastics travel</h2>



The study also uncovered the significant influence of particle size on how microplastics travel. Larger plastic fragments drop out of the atmosphere relatively quickly, often landing in coastal areas or not far from their point of emission.&nbsp;



By contrast, smaller particles can remain suspended for up to a year. That extended flight time allows them to cross entire oceans or continents and reach distant regions such as the <a href="https://www.earth.com/news/citizen-scientists-uncover-microplastics-in-the-remote-arctic/" target="_blank" rel="noreferrer noopener">Arctic</a>, where they land on ice or snow.



These discoveries highlight the global character of plastic contamination, showing that microplastic dust can be widespread in places typically considered pristine.&nbsp;



They also clarify that stopping microplastic pollution at its land-based sources may be the most efficient approach, as the ocean itself is neither the greatest emitter nor the root cause.



<h2 class="wp-block-heading" id="h-a-roadmap-for-pollution-reduction">A roadmap for pollution reduction</h2>



Given that airborne microplastics reach faraway corners of the planet, the research team’s results have immediate practical value. Any broad plan to cut plastic pollution should focus on terrestrial origins: tire wear on roads, textiles shedding fibers, and insufficiently treated wastewater.&nbsp;



Additionally, lessening single-use plastics and improving waste management at landfills can help limit microplastics before they disperse into the environment.



These findings show that ocean waters, already burdened by plastic accumulations, are predominantly sinks - taking in plastic particles from the air. They also emphasize that microplastics do not stay put in the environment: large ones settle nearby, while smaller ones can travel global distances.&nbsp;



Future models aimed at <a href="https://www.earth.com/news/plastic-pollution-is-changing-the-entire-earth-system/" target="_blank" rel="noreferrer noopener">plastic pollution</a> will need to consider these dynamics in more detail, particularly when mapping out strategies to protect vulnerable ecosystems, reduce human exposure, and maintain cleaner oceans.



By settling this debate over whether the ocean is more of a source or a sink, scientists can now direct their attention to mitigating the true origins of airborne microplastics, thus improving targeted policies to help address this pressing environmental concern.



The study is published in the journal <a href="https://dx.doi.org/10.1038/s41612-025-00914-3" target="_blank" rel="noreferrer noopener">npj Climate and Atmospheric Science</a>.



-----



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Airborne microplastics: Where they come from and where they go

A new study has found that, contrary to previous claims, the ocean is not a significant source of microplastics to the atmosphere, but rather a major sink.&nbsp; The research team used a global chemical transport model to evaluate how tiny plastic particles, known as microplastics, move around the world. The finding challenges past assumptions about the ocean’s role in releasing plastic fragments into the air. The journey of airborne microplastics&nbsp; Plastic debris in dust form is increasingly recognized as a worldwide contaminant. Microplastics (particles less than 5...

GOP Congress Agenda

Native American archaeological site may delay oil pipeline construction. Discovery of a Native American archaeological site that may have cultural significance could further delay construction of a $3.8 billion oil pipeline if government officials require the route to be moved.
Houston-based Dakota Access LLC wants to build the pipeline - designed to carry a half-million barrels of oil a day - from northwest North Dakota to a storage facility in south-central Illinois. Construction has begun in North Dakota, South Dakota and Illinois, but the Iowa Utilities Board has not authorized work to begin.
On Friday, Iowa State Archaeologist John Doershuk said his office had received information indicating a possible Native American site in northwest Iowa that, if confirmed, could result in relocation of the pipeline. He said details should start falling into place by next week, "as we confirm site characteristics and ownership/jurisdiction, as well as position relative to the planned pipeline construction activities."
Doershuk said in an email that those construction activities "may then be shifted, although the necessity of this course of action remains to be determined," he said.
Final approval for the <a href="https://www.bing.com/search?q=iowa&amp;form=EDGEAR&amp;qs=PF&amp;cvid=ff7e62d1209f45ee947cff73b19e4d69&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOMAjS%21RFp6jzZWJ7AkCsIYKL8eGEXIoI*zhTsEOwhxr43z8jRrKMt8zh2mEm1NE8ScrG*sngBWJfaLaMQlAT9Ka&amp;plvar=0&amp;PC=HCTS">Iowa</a> section is pending because the U.S. Army Corps of Engineers, which must issue permits for the pipeline to cross the <a href="http://www.earth.com/image/missouri-breaks-complex-fire-montana/">Missouri</a> and Mississippi rivers, hasn't issued its permits. A Corps spokesman said permits for the Iowa leg of the project are 60 to 120 days away.
Iowa was the last state to issue a permit for the pipeline, and the permit requires that Dakota Access prove it has all required federal and state permits before starting construction in Iowa.
Dakota Access is pressuring the Iowa Utilities Board to let it begin work at sites outside the jurisdiction of the Corps, but the board has declined to act quickly, saying it is reviewing comments from all sides before making a decision. Last week, the company said it had to start laying pipe this week in order to finish before winter and avoid disturbing farmland for a second growing season.
The Corps' main goal is to avoid impact to the environment and historically significant sites, and that often means working with the applicant to reroute the pipeline to avoid a sensitive area, said agency spokesman Ron Fournier, who serves a Corp district including Iowa and Illinois.
"If this is a significant Indian historical site that certainly could delay the permitting process if we have to get involved in realignments and avoid and minimize issues," Fournier said.
Dakota Access spokeswoman Vicki Granado said the company will continue to work with regulatory agencies "as we continue to move forward in preparation for the start of construction in Iowa."
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Native American archaeological site may delay oil pipeline construction

Native American archaeological site may delay oil pipeline construction. Discovery...

<div>

Coral reefs highlight threat to world's ecosystems. Fifty-nine finfish species have 'disappeared' from fishermen's catches in the world's most species rich and vulnerable marine region, new research has shown.

In the largest study of its kind, experts from <a href="https://www.bing.com/search?q=newcastle+university&amp;cvid=2e3a9d40a6f742d09c15159dc10070f6&amp;FORM=ANAB01&amp;PC=HCTS">Newcastle University</a>, UK, have highlighted the impact that uncontrolled fishing in particular is having on coral reefs.

Drawing on the knowledge of local fishermen in the Philippines, the team were able to build a picture of how finfish populations have declined over the last 65 years.Coral reefs highlight threat to world's ecosystems

Recording 59 species that were once common and have now disappeared from catches, the team highlighted five finfish that are now fighting for survival -- the green bumphead parrotfish, the humphead wrasse, the African pompano, the giant grouper and the mangrove red snapper. Publishing their findings this week in the science journal PLOS ONE, the report coincides with Endangered Species Day and highlights the "urgent need for action".

Lead scientist Nick Polunin, Professor or Environmental Science at Newcastle University, explains: "Most of us still think that nature is unlimited in the oceans.""But our coral reefs are good sentinels of global ocean change, and like the canary in the coal mine, they're telling us there's not much time left for action.

"These losses we've recorded in the Philippines are reflective of unsustainable exploitation affecting this exceptionally species rich ecosystem and region but they mirror what is happening in ecosystems around the globe.

"In the forests of India and Bangladesh it's the tigers and in China it's the Giant Panda; here in the Philippines we are showing that marine species are also very vulnerable. The list of endangered species is growing and we're very close to the tipping point."

Coral reefs occupy less than one percent of the marine area but they are home to 25 percent of all known marine fish species.

The team focussed their study on five areas recognised for being the most species rich in this exceptionally species-rich region: Lanuza Bay, Danajon Bank, Verde Island Passage, Polillo Islands and Honda Bay.

Asking fishermen to recall their typical good days' catches over the last six decades, the team used key dates to help link the memories, such as the Japanese occupation of the 1950s, presidents of the 60s and 70s and also photographic evidence.

Conducting 2,655 interviews, 59 finfish names were reported to have gone missing from catches between the 1950s and 2014. Of the five species with highest frequency zero reported catches in all five areas, four are classed as vulnerable or endangered on the IUCN Red List. "Similar to the Newfoundland Cod, where we saw stocks crash due to overfishing, these reef finfish populations have been overexploited and they may never recover," explains Professor Polunin.

"The knock-on effects of losing these species are huge: loss of the big predators is likely to radically affect the structure of the whole system."

Professor Selina Stead, co-author and Professor of Marine Governance and Environmental Science at Newcastle University adds: "This paper provides clear evidence of the dramatic decline of once common reef fish, and the value of local knowledge in helping to build an accurate picture.

"Governments worldwide increasingly request evidence to support policy change and hopefully this paper will highlight the need for urgency for action.


</div>
<div></div>

Coral reefs highlight threat to world's ecosystems

Coral reefs highlight threat to world's ecosystems. Fifty-nine finfish species...

Fate of primeval Bialowieza Forest hangs in the balance. It is the last remaining relic of an ancient forest that stretched for millennia across the lowlands of Europe and Russia, a shadowy, mossy woodland where bison and lynx roam beneath towering oak trees up to 600 years old.
Conservationists believe the fate of the Bialowieza Forest, which straddles Poland and Belarus, is more threatened that at any time since the communist era due to a new Polish government plan for extensive logging in parts of the forest. The plan has pitted the government against environmentalists and many scientists, who are fighting to save the UNESCO world heritage site.
Seven environmental groups, including Greenpeace and WWF, have lodged a complaint with the European Commission hoping to prevent the largescale felling of trees, which is due to begin within days. Bialowieza has been declared a Natura 2000 site, meaning it is a protected area under European law. EU officials say they are working with the Polish authorities to ensure that any new interventions in the forest are in line with their regulations, but it's not yet clear what the result will be.
The preservation of Bialowieza is such a sensitive matter that IKEA, which relies on Polish timber for 25 percent of its global furniture production, vowed years ago not to buy any wood from Bialowieza.
"This forest is a Polish treasure but it is also the world's treasure, and we could lose it," said Katarzyna Kosciesza from ClientEarth, one of the groups that filed the complaint. "The logging would really threaten it."
The forest plan is one of many controversial changes that have come with the election last year of a conservative populist party, Law and Justice. The new authorities have been accused by the European Union and human rights groups of eroding democracy and the rule of law.
The party's powerful leader, Jaroslaw Kaczynski, says he's on a mission to remake the country from top to bottom in line with the party's conservative Catholic and patriotic ideology. Since taking power in November, Poland's government has moved quickly to push broad changes in everything from cultural institutions to horse breeding farms and forestry management.
The government argues they are fixing the country by removing the corrupt influences of former communists and pro-Europeans who have held power in recent years.
In the case of Bialowieza, government officials are blaming their predecessors for financial losses from the strict limits on logging. The environment minister, Jan Szyszko, also faulted them for getting the UNESCO world heritage designation, which brings some international oversight.
About 35 percent of the forest on the Polish side includes a national park and reserves, strictly protected zones that the government does not plan to touch. Officials argue the planned logging is not harmful because it will take part only in "managed" parts of the forest that have already been subject to logging in the past. But environmentalists say the logging plan is so extensive it would inevitably lead to the destruction of old-growth areas.
About half of the forest is still considered pristine, meaning those areas have never faced significant intervention since the forest's formation some 8,000 to 9,000 years ago after the end of the last ice age. That has left it with a complex diversity of species unknown in the second-growth forests elsewhere in Europe's lowlands.
That so much has survived is thanks to past Polish and Lithuanian monarchs and Russian czars, who kept it as a royal hunting preserve. Only in the last 100 years has it begun to face logging and human encroachment.
Szyszko last week dismissed 32 of 39 scientific experts on the State Council for Nature Conservation after they criticized the logging plan. They have since been replaced by people who mainly come from the forestry and hunting sectors that favor greater wood extraction. They council's new leader, Wanda Olech-Piasecka, also supports limited commercial hunting of bison, an endangered species.
Szyszko said the new council "will work effectively for the use of natural resources for the benefit of man, which is consistent with the concept of sustainable development."
The Environment Ministry argues the logging is needed to stop the spread of bark beetle, which has killed off 10 percent of the spruce trees in the park - 3 percent of the trees overall - in an outbreak that began in 2013.
However, scientists believe that is merely a pretext, and that what officials really want are the profits from felling such old-growth wood.
Scientists and environmentalists who oppose the logging plan say removing the dead wood upsets the ecosystem. The dead spruces host thousands of other species, worms and insects and fungi, which then become food for birds, while hollow dying trunks create nesting spaces. Among those who rely on the dead spruces are the pygmy owl, the smallest owl species in Europe, and the three-toed woodpecker, which has a precarious existence in Bialowieza.
Thanks to the bark beetle outbreak, the numbers of the three-toed woodpecker have doubled or possibly tripled, said Rafal Kowalczyk, director of the Mammal Research Institute with the Polish Academy of Sciences.
Scientists fighting the logging say the death of some spruce trees is making way for an increase of other species like hornbeam and lime and is part of the forest's natural adaptation to climate change, as conditions grow warmer and drier. They also say that it would be necessary to kill 80 percent of infected trees simply to slow the outbreak, which is not logistically possible.
Kowalczyk says the bark beetle outbreaks, which have long been a part of the forest cycle, have never threatened its existence before and won't now. Fate of primeval Bialowieza Forest hangs in the balance
"This forest has been shaped for thousands of years by nature," Kowalczyk added. "It is really unique and we should not turn it into a managed forest. There are many other managed forests but this relic of an ancient forest, with its high diversity, shows us what <a href="http://www.earth.com/news/mangrove-forests-face-a-triple-threat-to-their-survival/">forests</a> looked like hundreds, even thousands, of years ago."
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Fate of primeval Bialowieza Forest hangs in the balance

Fate of primeval Bialowieza Forest hangs in the balance. It...

New Mexico seeks help for Gold King Mine spill cleanup. The federal government and Colorado have made little progress in remedying damage from the release of millions of gallons of wastewater from a southern <a href="https://www.bing.com/search?q=colorado&amp;form=EDGEAR&amp;qs=PF&amp;cvid=ae6e8b1b9ab841edbbfc14f7bb64da49&amp;cc=US&amp;setlang=en-US&amp;elv=AY3%21uAY7tbNNZGZ2yiGNjfOBcxbQRbvDfQi*Dv3Rctz2Bd6*tsK*1kwi8mPVCUemILFfyl*eoNVyWSGrDZzYjFiMgJz3XdNu5wt3QscbAr*Z&amp;plvar=0&amp;PC=HCTS">Colorado</a> Gold King Mine spill last year, <a href="http://www.earth.com/video/kilbourne-hole-maar-crater/">New Mexico</a>'s top prosecutor charged in a pair of scathing letters sent to officials this week.
The wastewater, which contained arsenic, copper, lead, mercury and other dangerous pollutants, rushed down a Colorado mountainside and eventually fouled rivers in three Western states, setting off a major response by government agencies and private groups. New Mexico seeks help for Gold King Mine spill cleanup
Attorney General Hector Balderas wrote to the head of the U.S Environmental Protection Agency and Colorado officials as New Mexico's threat to sue the agency, the neighboring state and two mining companies remains on the table.
Balderas said New Mexico reached out to discuss independent monitoring and remedial measures in the wake of the spill, but he's concerned about the lack of progress.
New Mexico's requests have been disregarded and minimized, he said.
"I am disappointed by the continued unwillingness to respond to the New Mexico Environment Department's numerous attempts to resolve this matter diplomatically and outside of court," Balderas said. "The safe and peaceful livelihood of our citizens should override any political or scientific indifferences that we face."
The EPA didn't comment directly on the letter, but a spokeswoman told The Associated Press that the agency takes responsibility for the cleanup of the spill.
Erin Lamb, a spokeswoman for Colorado Attorney General Cynthia Coffman, declined to comment because of the possible litigation.
The EPA announced last month that it would reimburse states, tribes and local governments about $1 million for their costs after an EPA-led crew triggered the release of 3 million gallons of wastewater from the inactive Gold King Mine while doing preliminary cleanup work.
Most of the money is for the cost of responding to the spill, but requests for another $570,000 in expenses from the immediate aftermath are still being considered.
During the spill, water utilities briefly shut down their intake valves and farmers stopped drawing from the rivers as the bright yellow plume moved downstream.
The EPA said the water quality quickly returned to pre-spill levels, but some continue to warn about heavy metals collecting in the sediment and being stirred up each time rain or snowmelt results in runoff.
In his letters, Balderas said New Mexico's agricultural landscape was severely damaged by what he described as a catastrophe. He said meeting the state's repeated and reasonable demands for compensation and long-term monitoring would be a step toward justice.
"Following this tragic incident, our greatest concern should be ensuring that the people and the lands we live on are free from hazardous materials," he wrote.
According to the EPA, $2 million has been allocated to support the states' and tribes' monitoring plans. Another $628,000 will help to fund a real-time alert system that will monitor water quality.
Sampling locations also have been set up in Colorado, New Mexico, Utah and on Southern Ute, Ute Mountain Ute and Navajo tribal lands as part of the EPA's monitoring program.
New Mexico has developed its own monitoring plan and the city of Farmington, which taps the Animas River for drinking water, has installed sensors to detect contamination.
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New Mexico seeks help for Gold King Mine spill cleanup

New Mexico seeks help for Gold King Mine spill cleanup....

Explaining sea ice cover differences at<a href="http://www.earth.com/news/hurricanes-are-getting-stronger-as-earth-gets-warmer/"> Earth'</a>s pole Why has the sea ice cover surrounding Antarctica been increasing slightly, in sharp contrast to the drastic loss of sea ice occurring in the Arctic Ocean? A new NASA-led study finds the geology of Antarctica and the Southern Ocean are responsible.

A NASA/NOAA/university team led by Son Nghiem of <a href="https://en.wikipedia.org/wiki/NASA">NASA's</a> Jet Propulsion Laboratory, Pasadena, California, used satellite radar, sea surface temperature, land form and bathymetry (ocean depth) data to study the physical processes and properties affecting Antarctic sea ice. They found that two persistent geological factors -- the topography of Antarctica and the depth of the ocean surrounding it -- are influencing winds and ocean currents, respectively, to drive the formation and evolution of Antarctica's sea ice cover and help sustain it.

"Our study provides strong evidence that the behavior of Antarctic sea ice is entirely consistent with the geophysical characteristics found in the southern polar region, which differ sharply from those present in the Arctic," said Nghiem.

Antarctic sea ice cover is dominated by first-year (seasonal) sea ice. Each year, the sea ice reaches its maximum extent around the frozen continent in September and retreats to about 17 percent of that extent in February. Since the late 1970s, its extent has been relatively stable, increasing just slightly; however, regional differences are observed.

[caption id="attachment_2391593" align="alignleft" width="150"]<img class="size-thumbnail wp-image-2391593" src="http://cff1.greenatom.net/uploads/2016/05/23090915/antarctic-sea-ice-depth-2014_1big_nasa-150x150.jpg" alt="Location of the southern Antarctic Circumpolar Current front (white contour)" width="150" height="150" /> Location of the southern Antarctic Circumpolar Current front (white contour)[/caption]

Over the years, scientists have floated various hypotheses to explain the behavior of Antarctic sea ice, particularly in light of observed global temperature increases. Are changes in the ozone hole involved? Could fresh meltwater from Antarctic ice shelves be making the ocean surface less salty and more conducive to ice formation, since salt inhibits freezing? Are increases in the strength of Antarctic winds causing the ice to thicken? Something is protecting Antarctic sea ice, but a definitive answer has remained elusive.

To tackle this cryospheric conundrum, Nghiem and his team adopted a novel approach. They analyzed radar data from NASA's QuikScat satellite from 1999 to 2009 to trace the paths of Antarctic sea ice movements and map its different types. They focused on the 2008 growth season, a year of exceptional seasonal variability in Antarctic sea ice coverage.

Their analyses revealed that as sea ice forms and builds up early in the sea ice growth season, it gets pushed offshore and northward by winds, forming a protective shield of older, thicker ice that circulates around the continent. The persistent winds, which flow downslope off the continent and are shaped by Antarctica's topography, pile ice up against the massive ice shield, enhancing its thickness. This band of ice, which varies in width from roughly 62 to 620 miles (100 to 1,000 kilometers), encapsulates and protects younger, thinner ice in the ice pack behind it from being reduced by winds and waves.

The team also used QuikScat radar data to classify the different types of Antarctic sea ice. Older, thicker sea ice returns a stronger radar signal than younger, thinner ice does. They found the sea ice within the protective shield was older and rougher (due to longer exposure to wind and waves), and thicker (due to more ice growth and snow accumulation). As the sea ice cover expands and ice drifts away from the continent, areas of open water form behind it on the sea surface, creating "ice factories" conducive to rapid sea ice growth.

[caption id="attachment_2391592" align="alignleft" width="150"]<img class="size-thumbnail wp-image-2391592" src="http://cff1.greenatom.net/uploads/2016/05/23090908/antarctic-sea-ice-depth-2009_2big_nasa-150x150.jpg" alt="Map of sea surface temperatures in Antarctica" width="150" height="150" /> Map of sea surface temperatures in Antarctica[/caption]

To address the question of how the Southern Ocean maintains this great sea ice shield, the team combined sea surface temperature data from multiple satellites with a recently available bathymetric chart of the depth of the world's oceans. Sea surface temperature data reveal that at the peak of ice growth season, the boundary of the ice shield remains behind a 30-degree Fahrenheit (-1 degree Celsius) temperature line surrounding Antarctica. This temperature line corresponds with the southern Antarctic Circumpolar Current front, a boundary that separates the circulation of cold and warm waters around Antarctica. The team theorized that the location of this front follows the underwater bathymetry.

When they plotted the bathymetric data against the ocean temperatures, the pieces fit together like a jigsaw puzzle. Pronounced seafloor features strongly guide the ocean current and correspond closely with observed regional Antarctic sea ice patterns. For example, the current stays near Bouvet Island, located 1,000 miles (1,600 kilometers) from the nearest land, where three tectonic plates join to form seafloor ridges. Off the coast of East Antarctica, the -1 degree Celsius sea surface temperature lines closely bundle together as they cross the Kerguelen Plateau (a submerged microcontinent that broke out of the ancient Gondwana supercontinent), through a deep channel called the Fawn Trough. But those lines spread apart over adjacent deep ocean basins, where seafloor features are not pronounced. Off the West Antarctica coast, the deep, smooth seafloor loses its grip over the current, allowing sea ice extent to decrease and resulting in large year-to-year variations.

Study results are published in the journal Remote Sensing of Environment. Other participating institutions include the Joint Institute for Regional Earth System Science and Engineering at UCLA; the Applied Physics Laboratory at the University of Washington in Seattle; and the U.S. National/Naval Ice Center, NOAA Satellite Operations Facility in Suitland, Maryland. Additional funding was provided by the National Science Foundation.

NASA uses the vantage point of space to increase our understanding of our home planet, improve lives and safeguard our future. NASA develops new ways to observe and study Earth's interconnected natural systems with long-term data records. The agency freely shares this unique knowledge and works with institutions around the world to gain new insights into how our planet is changing.

QuikScat was built and is managed by JPL. For more information, visit:

<a href="http://winds.jpl.nasa.gov/missions/quikscat/" target="_blank" rel="noopener noreferrer">http://winds.jpl.nasa.gov/missions/quikscat/</a>

For more information about NASA's Earth science activities, visit:

<a href="http://www.nasa.gov/earth" target="_blank" rel="noopener noreferrer">http://www.nasa.gov/earth</a>

Explaining sea ice cover differences at Earth's pole

Explaining sea ice cover differences at Earth's pole Why has...

UN alarmed by 12th straight global monthly heat record. The United Nations has expressed alarm after scientists recorded the 12th straight <a href="https://www.bing.com/search?q=gobal&amp;cvid=8191859b3cee430eb198e0b4e1b1430f&amp;FORM=ANAB01&amp;PC=HCTS">global</a> monthly heat record.
The data from the U.S. National Oceanic and Atmospheric Administration released Thursday confirmed earlier readings taken by NASA and the Japan Meteorological Agency. They showed that Earth's average temperature in April was 1.1 degrees Celsius (2 degrees Fahrenheit) higher than the 20th-century average.
A spokeswoman for the World Meteorological Organization said Friday "what's particularly concerning is the margin at which these records are being broken. They are not being broken, they are being smashed and on a fairly consistent basis." UN alarmed by 12th straight global monthly heat record
Spokeswoman Clare Nullis told reporters in<a href="http://www.earth.com/image/the-rhone-river-flowing-into-lake-geneva/"> Geneva</a> that while the records set last year were already alarming, "the heat that we're seeing in 2016 makes 2015 pale by comparison."
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.
The United Nations (UN) is an <a title="Intergovernmental organization" href="https://en.wikipedia.org/wiki/Intergovernmental_organization">intergovernmental organization</a> that aims to maintain <a class="mw-redirect" title="International peace" href="https://en.wikipedia.org/wiki/International_peace">international peace</a> and <a title="International security" href="https://en.wikipedia.org/wiki/International_security">security</a>, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonizing the actions of nations. It is the largest, most familiar, most internationally represented and most powerful intergovernmental organization in the world.The UN is <a title="Headquarters of the United Nations" href="https://en.wikipedia.org/wiki/Headquarters_of_the_United_Nations">headquartered</a> on <a title="Extraterritoriality" href="https://en.wikipedia.org/wiki/Extraterritoriality">international territory</a> in <a title="New York City" href="https://en.wikipedia.org/wiki/New_York_City">New York City</a>, with its other main offices in <a title="United Nations Office at Geneva" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Geneva">Geneva</a>, <a title="United Nations Office at Nairobi" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Nairobi">Nairobi</a>, <a title="United Nations Office at Vienna" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Vienna">Vienna</a> and <a title="The Hague" href="https://en.wikipedia.org/wiki/The_Hague">The Hague</a>.

UN alarmed by 12th straight global monthly heat record

UN alarmed by 12th straight global monthly heat record. The...

Relationship between healthy environment and healthy people is critical. The most worrying environmental threats facing the world today range from the rise in diseases transmitted from animals to humans to the increasing accumulation of toxic chemicals in food crops as a result of drought and high temperatures, according to a U.N. report released Friday.
The U.N. Environment Agency's Frontiers report also highlighted the threat to human health posed by the alarming amount of plastic waste in the oceans, and scientific evidence suggesting that losses and damage from climate change are inevitable, with "profound consequences" for ecosystems, people, assets and<a href="https://www.bing.com/search?q=economies&amp;cvid=800c4bf8c1e84a15b8d1afbf39e5cc93&amp;FORM=ANAB01&amp;PC=HCTS"> economies</a>.
The report emphasizes "the critical relationship between a healthy environment and healthy people," and stresses the importance of combatting global warming by moving to a low-carbon future.
According to the report, the 20th century saw dramatic reductions in ecosystems and biodiversity - and equally dramatic increases in the numbers of people and domestic animals inhabiting the Earth.
This increased the opportunity for viruses, bacteria and other pathogenic agents to pass from wild and domestic animals through the environment to cause diseases in people, the report said.
These diseases - called "zoonotic" or "zoonoses" diseases - include Ebola, bird flu, Middle East respiratory syndrome (MERS), sudden acute respiratory syndrome (SARS), Rift Valley fever, West Nile virus and Zika virus, it said.
In the last two decades these emerging diseases have had direct costs of more than $100 billion, the report said, and "if these outbreaks had become human pandemics, the losses would have amounted to several trillion dollars." Relationship between healthy environment and healthy people is critical
According to the report, "around 60 per cent of all infectious diseases in humans are zoonotic as are 75 per cent of all emerging infectious diseases." And "on average, one new infectious disease emerges in humans every four months," it said.
While many zoonotic diseases originate in wildlife, livestock often serve as a bridge, the report said, citing the case of bird flu which first circulated in wild birds, then infected domestic poultry which in turn passed the virus to humans.
As for toxic chemicals in crops, normally plants convert nitrate into amino acids and protein but drought slows the conversion causing nitrates to accumulate and become toxic to animals, the report said.
Worldwide, over 80 plant species are known to cause poisoning from accumulation of nitrates and wheat, barley, maize, millet, sorghum and soybeans are among the crops most susceptible, it said.
"Acute nitrate poisoning in animals can lead to miscarriage, asphyxiation and death," the report said, and it can ruin the livelihoods of small farmers and herders.
Another toxin associated with climate change is hydrogen cyanide or prussic acid that can accumulate in plants such as cassava, flax, maize and sorghum, it said.
Mycotoxins, which are chemical by-products of the growth of mushrooms and other fungi, "can cause severe damage to the health of animals and humans, even at small concentration," the report said. And "mycotoxin-producing fungi infect many crops such as coffee, groundnut, maize, oilseeds, peanut, sorghum, tree nuts and wheat."
Aflatoxins, which are fungal toxins that can cause cancer and stunt fetal growth, are another emerging problem in crops, the report said.
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Relationship between healthy environment and healthy people is critical

Relationship between healthy environment and healthy people is critical. The...

<div>

Barium leaches directly from fracked rocks. HANOVER, N.H. - Dartmouth College researchers are shedding light on the early chemical reactions in the organic sediments that would ultimately become the Marcellus Shale, a major source of natural gas and petroleum.

The <a href="http://www.sciencedirect.com/science/article/pii/S0016703716300965" target="_blank" rel="noopener noreferrer">findings</a> appear in the journal Geochimica et Cosmochimica Acta. The research extends an earlier <a href="http://www.sciencedirect.com/science/article/pii/S088329271530069X" target="_blank" rel="noopener noreferrer">study</a> by the Dartmouth team. Both PDFs are available on request.

Water injected into shale formations in hydraulic fracturing returns with extraordinarily high total-dissolved-solids and high concentrations of the toxic metal barium. The hazardous wastewater is assumed to be partly due to chemicals introduced into injected freshwater when it mixes with highly saline brine naturally present in the rock. But in their earlier study, the researchers found that chemical reactions between injected freshwater and the fractured shale itself caused barium to leach directly from the fractured rock. Barium leaches directly from fracked rocks

In the new study, the researchers addressed the basic question of when, why and how the Marcellus Shale became enriched in barium in the first place. They studied in detail the chemistry, mineralogy and sulfur isotope composition of a two-inch thick core. It was a special sample as it contains about 5,000 micrograms of barium per gram of rock. Such samples are concentrated only at a few depth intervals in the Marcellus Shale. The sample provided the researchers with insight into how, when and where a barium bearing mineral (barite) altered into iron sulfide (pyrite) during the transformation of organic rich marine sediment into shale in Devonian times.

The researchers discovered barite grains being "bitten" by pyrite as the latter replaced the former through a complex set of reactions that could occur only at a very specific depth interval where both sulfate (barite) and sulfide (pyrite) are present. This interval is called the sulfate-methane transition zone, which has been identified in relatively recent sediments but not in 400 million year old sediments.

"Our new study provides insights into the generalized nature of barium mobilization as barite is dissolved in organic rich sediments and its redistribution in clay minerals," says senior author <a href="http://earthsciences.dartmouth.edu/people/mukul-sharma" target="_blank" rel="noopener noreferrer">Mukul Sharma</a>, a professor of earth sciences.
###
Professor Mukul Sharma is available to comment at <a href="mailto:Mukul.Sharma@dartmouth.edu">Mukul.Sharma@dartmouth.edu</a>.

Broadcast studios: Dartmouth has TV and radio studios available for interviews. For more information, visit: <a href="http://communications.dartmouth.edu/media/broadcast-studios" target="_blank" rel="noopener noreferrer">http://communications. dartmouth. edu/ media/ broadcast-studios</a>.

</div>

Barium leaches directly from fracked rocks

Barium leaches directly from fracked rocks. HANOVER, N.H. - Dartmouth...

<div>

Can legumes solve environmental issues?. It's a win-win situation for the environment and the economy when it comes to introducing legumes into agricultural systems, says new research published in Frontiers in Plant Science, carried out by an <a href="https://www.bing.com/search?q=international&amp;cvid=b027780e95f844259d8bd6b5c0625e3a&amp;FORM=ANAB01&amp;PC=HCTS">international</a> team of scientists as part of the European Union project, Legume Futures.

Currently Europe's crop production is highly specialized in only a small number of plant species, to the detriment of the environment. Cereal crops dominate, meaning Europe imports over 70% of its protein feed stocks to support the meat industry. Can legumes solve environmental issues?

"The introduction of legumes such as clovers, lupins, lucerne and faba beans can increase the sustainability of agriculture and the supply of protein in Europe," stated Moritz Reckling of the Leibniz Centre for Agriculture Research (ZALF) in Germany and lead author of this study. Legumes are protein-rich and would provide relief for the deficit; they also increase the amount of nitrogen available to plants through biological nitrogen fixation, reducing the need for fertilisers.

With less than 2% of European arable land currently used to grow grain legumes, Reckling and co-workers created a model to determine the effects of integrating legumes into cropping systems. The team set out to evaluate the trade-offs between <a href="http://www.earth.com/news/environmental-era-of-pandemics/">environmental</a> and economic effects of legume integration.

To demonstrate applicability in different regions, they used five case study areas in Europe with contrasting climatic conditions and cropping systems. Reckling explained: "legumes are seen to be generally beneficial to the environment, but they are not economically attractive to farmers when compared as single crops, so we wanted to look at the gross margins of crop rotations when legumes are integrated".

The team confirmed the environmental benefits to introducing legumes and found that in such cropping systems, overall nitrous oxide emissions reduced by approximately 20-30% and fertilizer use was down by 25% to almost 40% in some cases. The systems developed did not show increased nitrate leaching into groundwater supplies, and in some systems with forage legumes leaching was even reduced.

Most significantly, the gross margins evaluated show an increase in all of the forage agriculture systems modelled, and in two out of the five arable systems. "When comparing the trade-offs between environmental and economic effects, the study shows that positive environmental effects do not necessarily mean that gross margins go down," concluded Reckling.

Contrary to popular belief, these findings show that the benefits of diversifying cropping systems through the inclusion of legumes can be both environmental and economic. Based on real case-study regions, the results demonstrate great potential for implementation.

The study also supports the recent reforms to the European Union's Common Agricultural Policy that promote the reintroduction of legumes into cropping systems. Through the effects of these incentives and increased awareness, the percentage of legumes grown on arable land is already beginning to rise. To provide further recommendations and support for farmers, research into the high variability of legume yields in the context of climate change adaptation is currently underway as part of the European project, Climate-CAFE.


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Can legumes solve environmental issues?

Can legumes solve environmental issues?. It's a win-win situation for...

<div>

A history of snowfall on Greenland. The history of snowfall in Greenland is chronicled in an unlikely place: the remains of aquatic plants that died long ago, collecting at the bottom of lakes in horizontal layers that document the passing years.

Using this ancient record, scientists are attempting to reconstruct how Arctic precipitation fluctuated over the past several millennia, potentially influencing the size of the Greenland Ice Sheet as the Earth warmed and cooled.A history of snowfall on Greenland

An early study in this field finds that snowfall at one key location in western Greenland may have intensified from 6,000 to 4,000 years ago, a period when the planet's Northern Hemisphere was warmer than it is today.

While more research needs to be done to draw conclusions about ancient precipitation patterns across Greenland, the new results are consistent with the hypothesis that global warming could drive increasing <a href="https://www.bing.com/search?q=arctic+snowfall&amp;cvid=dd12b985fa8f4ee7bb16a04bc78f7e95&amp;FORM=ANAB01&amp;PC=HCTS">Arctic snowfall</a> -- a trend that would slow the shrinkage of the Greenland Ice Sheet and, ultimately, affect the pace at which sea levels rise.

"As the Arctic gets warmer, there is a vigorous scientific debate about how stable the Greenland Ice Sheet will be. How quickly will it lose mass?" says lead researcher Elizabeth Thomas, PhD, an assistant professor of geology in the University at Buffalo College of Arts and Sciences who completed much of the study as a postdoctoral fellow at the University of Massachusetts Amherst.

"Climate models and observations suggest that as temperatures rise, snowfall over Greenland could increase as sea ice melts and larger areas of the ocean are exposed for evaporation. This would slow the decline of the ice sheet, because snow would add to its mass," Thomas says. "Our findings are consistent with this hypothesis. We see evidence that the ratio of snow to rain was unusually high from 6,000 to 4,000 years ago, which is what you would expect to see if sea ice loss causes snowfall to increase in the region."

The research was published on May 23 in Geophysical Research Letters, a journal of the American Geophysical Union.

Aquatic plant leaf waxes as a record of snowfall

Thomas' research looks to understand how precipitation changed in the past, with an eye toward better predicting how modern warming will affect the Earth.

"We are using the past to see what might happen in the future," she says.

Aquatic leaf waxes are a relatively new tool for completing this work. They reveal information about the seasonality of precipitation -- how amounts of ancient summer rain compared to amounts of ancient winter snow.

To understand how aquatic leaf waxes function as a historical record, you need to know a little about aquatic plants. In the Arctic, these organisms survive on lake water, and use hydrogen atoms from this water to produce wax coatings on leaves.

These hydrogen atoms are the key to studying precipitation: In years when the ratio of summer rain to winter snow in a region is high, lake water and aquatic leaf waxes end up containing high levels of a rare form of hydrogen called deuterium, which is heavier than "normal" hydrogen. (This is because summer rain holds more deuterium than winter snowfall.)

In contrast, in years when snow is relatively abundant, aquatic plants start producing waxes with less deuterium.

This is what Thomas and her colleagues saw when they extracted a long, cylindrical sediment sample from a lake bottom in western Greenland. The mud contains ancient leaf waxes, with the oldest at the base of the column and the youngest at the top.

By dating and analyzing thin slices of the sample, the team determined that aquatic leaf waxes had low levels of deuterium from 6,000 to 4,000 years ago.

This is exactly what researchers would expect to see if the warm temperatures of that time had fueled sea ice loss, leading to increased Arctic snowfall and a decline in deuterium in lakes, Thomas said. She acknowledged that it's possible that a drop in summer rainfall accounted for the changes in deuterium, but says a rise in winter snowfall is the more likely explanation, as scientists have found independent evidence that the region was wetter 6,000 to 4,000 years ago.
###
The research team included UB Associate Professor of Geology Jason Briner; undergraduate student John J. Ryan-Henry from Brown University, the University of Rhode Island and the Roger Williams University School of Law; and Professor Yongsong Huang from Brown University and the Chinese Academy of Sciences. The study was funded by the National Science Foundation and research grants from the Geological Society of America.

</div>

A history of snowfall on Greenland

A history of snowfall on Greenland. The history of snowfall...

'Genetic toolkit' will help shed light on which species survive climate change

Scientists create world's largest coral gene database. Coral reefs - stunning, critical habitats for an enormous array of prized fish and other species - have survived five major extinction events over the last 250 million years.

Now, an international team of scientists led by Rutgers faculty has conducted the world's most comprehensive analysis of coral genes, focusing on how their <a href="https://www.bing.com/search?q=evolution&amp;cvid=80d3c79a0cf248edb249db76d90cc852&amp;FORM=ANAB01&amp;PC=HCTS">evolution</a> has allowed corals to interact with and adapt to the environment. A second study led by Rutgers researchers with colleagues at the University of Hawaii shows -- for the first time -- how stony corals create their hard skeletons, using proteins as key ingredients. Scientists create world's largest coral gene database

"There are a few key genes in corals that allow them to build this house that laid down the foundation for many, many thousands of years of corals," said Debashish Bhattacharya, a professor in the Department of Ecology, Evolution and Natural Resources in the School of Environmental and Biological Sciences at Rutgers. "It couldn't be any more fundamental to ocean ecosystems."

"I think one of the more interesting aspects of these data will be to understand which coral species may become winners or losers in the face of anthropogenic climate change - what makes them tougher and what makes them susceptible to changes in temperature, changes in ocean acidification," said Paul Falkowski, a professor who leads the Environmental <a href="http://www.earth.com/news/ion-channel-plant-communication/">Biophysics</a> and Molecular Ecology Laboratory at Rutgers.

The coral gene database study, led by Bhattacharya and Falkowski, was published today in the journal eLife. The study stems from an international coral genomics symposium and workshop held at Rutgers in February 2014 that was funded by the National Science Foundation. The stony coral study was published in the Proceedings of the Royal Society B: Biological Sciences last month.

Nearly all corals are colonial organisms that consist of as many as hundreds of thousands of animals called polyps. Types of corals include stony, shallow-water species that build reefs, soft corals and deep-water corals that live in dark cold waters, according to the National Oceanic and Atmospheric Administration.

Corals face four major threats from humans: Destruction of reefs by grenades and poison used to kill fish for food; nutrient pollution, usually from sewage or agricultural runoff, that overstimulates harmful algae; increased heat in the upper ocean, which causes most coral bleaching that can kill reefs; and acidification of the ocean, according to Falkowski.

"Corals are the most diverse marine ecosystems on the planet," he said. "But their value to marine ecosystems -- and to our own use of marine resources -- is very underappreciated."

Recent aerial and underwater surveys have found that 93 percent of the Great Barrier Reef off Queensland in Australia has endured very severe, moderate or at least some coral bleaching this year, according to the ARC Centre of Excellence for Coral Reef Studies in Australia. The reef, a world-renowned tourist attraction, is about 1,430 miles long.

Elevated sea temperatures from global warming can cause corals to expel tiny, colorful algae, according to the center. Corals turn translucent and white when they lose the algae. Mildly bleached corals can recover if the temperature drops and algae can recolonize them. If not, corals may die.

At Rutgers two years ago, leaders in the field of coral biology and genomics met to plan an analysis of 20 coral genomic datasets. The goal was to provide a comprehensive understanding of coral evolution since the organisms appeared on Earth 525 million years ago. The coral database, which includes corals in tropical waters, has been posted on the comparative.reefgenomics.org website to foster growth in this important area of research.

The eLife study's major advances include explaining the origin and evolution of the unique genes involved in the creation of hard skeletons by corals. The study also serves as a novel toolkit compared with the genes of humans, shellfish and other animals with hard skeletons.

Bhattacharya and coauthors found dozens of genes that allow corals to coordinate their response to changes in temperature, light and pH (acidity vs. alkalinity) and deal with stress triggered by the algae that live with them and exposure to high levels of light.

Surprisingly, some of these stress-related genes are of bacterial origin and were acquired to help corals survive. An intriguing theory that arose from the study is that the vast genetic repertoire of corals may help them adapt to changing ocean conditions.

The study in the Proceedings of the Royal Society B: Biological Sciences -- led by former Rutgers Department of Marine and Coastal Sciences post-doctoral fellow Tali Mass -- explains how stony corals make their hard, calcium carbonate skeletons. It also explains how this process might be affected as the oceans become more acidic due to climate change. Acidity increases as oceans are exposed to higher concentrations of carbon dioxide, the main greenhouse gas and cause of climate change, in the atmosphere.

"The aragonite (hard skeleton) is not just minerals," Bhattacharya said. "The proteins are very important for giving it shape and making it stable."

Falkowski said the study serves as a model for understanding how we can regenerate bone. "There are amazing parallels between the production of the skeleton of coral and production of bone," he said.

--

<a href="http://www.rutgers.edu" target="_blank" rel="noopener noreferrer">Rutgers University</a>

Scientists create world's largest coral gene database

'Genetic toolkit' will help shed light on which species survive...

Trump denies global warming but admits rising sea levels. Donald Trump wants to build another huge wall, this time to keep out the rising sea levels threatening to swamp his luxury golf resort in <a href="https://www.bing.com/search?q=ireland&amp;cvid=077081c2278f46eea66e66513bbdabfa&amp;FORM=ANAB01&amp;PC=HCTS">Ireland</a>.
The Republican presidential candidate has called climate change a "con job" and a "hoax." But in an application filed this month in County Clare, Ireland, the Trump International Golf Links and Hotel cites the threat of global warming in seeking a permit to build a nearly two-mile-long stone wall between it and the <a href="http://atlantic ocean">Atlantic Ocean</a>. The beach in front of the 18th green is disappearing at a rate of about a yard each year.
Trump's application, first reported Monday by Politico, cites local regulations pertaining to "rising sea levels and increased storm frequency and wave energy associated with global warming." An attached environmental impact statement says that almost all the dunes in western Ireland are retreating "due to sea level rise and increased Atlantic storminess."
Trump campaign spokesman Alan Garten did not respond Monday to messages from The Associated Press seeking comment.
Trump, who has roiled the immigration debate by proposing to build a massive wall along the Mexican border, has repeatedly taken to Twitter to express skepticism that human activity is causing the world to warm, raising sea levels as the polar ice caps melt. He has also said he would seek to "renegotiate" the global accord to cut climate-warming carbon emissions agreed to by President Barack Obama in December.
"The concept of global warming was created by and for the <a href="http://www.earth.com/image/aglaonema-chinese-evergreen/">Chinese</a> in order to make U.S. manufacturing non-competitive," Trump tweeted in 2012.
"The entire country is FREEZING - we desperately need a heavy dose of global warming, and fast! Ice caps size reaches all time high," Trump tweeted in 2014.
Environmental groups pounced on the application as evidence of hypocrisy.
"Donald Trump clearly cares more about the fate of his golf courses than the health of the millions of families already affected by the climate crisis," said Adam Beitman, a spokesman for the Sierra Club.
---
Associated Press writer Shawn Pogatchnik contributed from Dublin, Ireland.
---
Follow Michael Biesecker on Twitter at <a href="https://twitter.com/mbieseck" target="_blank" rel="noopener noreferrer">https://twitter.com/mbieseck</a>
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Trump denies global warming but admits rising sea levels

Trump denies global warming but admits rising sea levels. Donald...

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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



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

Designing crops that can beat the heat

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Remote sensing will revolutionize the way we monitor trees

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

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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

Lesotho: Africa's "Kingdom in the Sky"

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

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



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



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



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



Video Credit: NASA Goddard



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



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

Wetlands are a major source of methane emissions

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

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



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



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



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



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



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



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



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



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



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



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The rapid retreat of the Columbia Glacier

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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2022 illustrated the consequences of a warming climate

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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Satellites reveal how Earth's systems are interconnected

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



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Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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Melt ponds on the Greenland Ice Sheet

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



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



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



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



Video Credit: ESA



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



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Tracking changes in Earth's water cycle

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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



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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



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Plants help remove heavy metals from contaminated soil

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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



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NASA monitors giant dust storms on Mars

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



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



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



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



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



Video Credit: ESA&nbsp;



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



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Qeshm Island in the Strait of Hormuz

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



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



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



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



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



Video/ Image Credit: ESA



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



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Inhambane Bay in southeast Mozambique

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



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



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



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



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



Video Credit: ESA



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



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Kangerlussuaq Glacier on the Greenland ice sheet

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



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



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



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



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



Video Credit: ESA



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



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Ocean heat influences regional climate

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



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



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



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



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



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



Image/ Video Credit: ESA



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

Monitoring the dynamic shape of the sea surface

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Aerial,Photo,Of,River,In,Amazon,Rainforest,Jungle,In,Peru

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Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA’s Goddard Space Flight Center</a> describes how scientists are using autonomous sound sensors to monitor deforestation in the Amazon. By recording soundscapes, the experts can determine which animals are present through their distinct sounds.&nbsp;



Using this method, sounds can be used as scientific measurements to analyze the effects of deforestation. The researchers will gain a better understanding of how the acoustics of a forest can be used to measure its health.&nbsp;



"From space, parts of the Amazon rainforest that have previously been logged or burned may look lush and green, like a place buzzing with activity and full of sounds. But inside the rainforest, the animal life may tell a different story, of a harsh environment and a quieter soundscape," says NASA.



Video Credit: NASA’s Goddard Space Flight Center&nbsp;



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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 deforestation in the Amazon through sounds

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