You probably know at least a little bit about ocean circulation around the world, also known as currents. In fact, you may have felt smaller currents yourself on a day at the beach.



But have you heard bout the "great global ocean conveyor belt," which is a vast network of currents that constantly moves water around the entire planet?



This massive system helps distribute heat around the world, influencing everything from temperatures to rainfall. Unfortunately, it's slowing down and on the verge of total collapse.



Scientists have been studying this phenomenon, and according to recent research published in <a href="https://www.nature.com/articles/s41561-024-01568-1" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>, it's a bigger deal than we thought. 



<h2 class="wp-block-heading" id="h-ocean-circulation-and-the-amoc">Ocean circulation and the AMOC?</h2>



The Atlantic Meridional Overturning Circulation, or AMOC, is like a massive ocean conveyor belt that moves warm and cold water around the <a href="https://www.earth.com/news/why-the-atlantic-ocean-may-ultimately-vanish/" target="_blank" rel="noreferrer noopener">Atlantic Ocean</a>. 



It starts in the Gulf of Mexico, where warm, salty water flows northward along the eastern coast of the United States and across the Atlantic towards Europe. 



As this warm water reaches the North Atlantic, it cools down, becomes denser, and sinks deep into the ocean. 



This sinking process pulls more warm water north to replace it, creating a continuous loop that helps <a href="https://www.earth.com/news/collapse-of-major-ocean-system-would-cause-weather-chaos/" target="_blank" rel="noreferrer noopener">regulate the climate</a> by distributing heat across the planet. 



Thanks to the AMOC, regions like Western Europe enjoy milder winters than they would otherwise.



Humans rely on the AMOC in several important ways. By regulating global temperatures, it helps maintain stable weather patterns, which are crucial for agriculture, ecosystems, and our daily lives. 



Researchers point out that the Atlantic Meridional Overturning Circulation (AMOC) is now weaker than at any other time in the past 1,000 years.



The research team from several leading universities explains that global warming is behind this slowdown. 



Their new modeling suggests that meltwater from the <a href="https://www.earth.com/news/greenlands-melting-icebergs-may-not-be-threat-to-ocean-currents-amoc/" target="_blank" rel="noreferrer noopener">Greenland ice sheet</a> and Canadian glaciers could be the missing piece of the puzzle.



<h2 class="wp-block-heading" id="h-why-should-we-care-about-this">Why should we care about this?</h2>



"Our results show the Atlantic overturning circulation is likely to become a third weaker than it was 70 years ago at 2°C of global warming," says the research team. 



"This would bring big changes to the <a href="https://www.earth.com/news/the-arctic-is-melting-fast-but-a-slowing-ocean-current-could-help/" target="_blank" rel="noreferrer noopener">climate and ecosystems</a>, including faster warming in the southern hemisphere, harsher winters in Europe, and weakening of the northern hemisphere's tropical monsoons."



Think about that for a second. A weaker ocean current could mean colder winters in Europe and shifts in rainfall patterns that affect millions of people. It's not just about the ocean; <a href="https://www.earth.com/news/disastrous-climate-changes-of-the-last-ice-age-could-happen-again/" target="_blank" rel="noreferrer noopener">it's about our daily lives</a>.



<h2 class="wp-block-heading" id="h-meltwater-and-ocean-circulation">Meltwater and ocean circulation</h2>



The Earth has already warmed 1.5ºC since the industrial revolution. And get this: the Arctic has been heating up nearly four times faster than the rest of the planet. 



All that heat is melting Arctic sea ice, glaciers, and the Greenland ice sheet.



"Since 2002, Greenland lost 5,900 billion tons (gigatons) of ice," notes the research team. "To put that into perspective, imagine if the entire state of Texas was covered in ice 26 feet thick."



All this fresh meltwater flowing into the subarctic ocean is lighter than salty seawater, so it doesn't sink as much. 



That messes with the southward flow of deep, cold waters from the Atlantic and <a href="https://www.earth.com/news/climate-change-will-impact-the-gulf-stream-more-than-we-thought/" target="_blank" rel="noreferrer noopener">weakens the Gulf Stream</a> -- the same current that gives Britain its mild winters.



<h2 class="wp-block-heading" id="h-ripple-effects-around-the-globe">Ripple effects around the globe</h2>



So, what's the big deal with the Gulf Stream slowing down? Well, for starters, Europe could face harsher winters. 



<a href="https://www.earth.com/news/climate-paradox-ocean-current-collapse-could-plunge-europe-into-cold/" target="_blank" rel="noreferrer noopener">Places like Britain</a> might start feeling more like their chilly counterparts at the same latitude, such as parts of Canada.



<figure class="wp-block-image aligncenter size-full is-resized"><a href="https://www.earth.com/wp-content/uploads/2024/11/Atlantic-Meridional-Overturning-Circulation_AMOC_collapsing_Nature-Geoscience_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/Atlantic-Meridional-Overturning-Circulation_AMOC_collapsing_Nature-Geoscience_1s.webp" alt="The addition of meltwater in the North Atlantic leads to localised cooling in the subpolar North Atlantic and warming in the South Atlantic. Credit: Nature Geoscience (2024)." class="wp-image-1951410" style="width:300px;height:auto"/></a><figcaption class="wp-element-caption">The addition of meltwater in the North Atlantic leads to localised cooling in the subpolar North Atlantic and warming in the South Atlantic. Credit: Nature Geoscience (2024).</figcaption></figure>



"Our new research shows meltwater from the Greenland ice sheet and Arctic glaciers in Canada is the missing piece in the climate puzzle," the researchers explain. 



When they included this meltwater in their simulations, the slowing of the oceanic circulation made sense.



The study confirms that the Atlantic overturning circulation has been slowing down since the mid-20th century. It also gives us a sneak peek into <a href="https://www.earth.com/news/atlantic-and-arctic-mixing-is-crucial-for-earths-climate-stability/" target="_blank" rel="noreferrer noopener">what's coming next</a>.



<h2 class="wp-block-heading" id="h-northern-and-southern-oceans-connected">Northern and Southern oceans connected</h2>



"Our new research also shows the North and South Atlantic oceans are more connected than previously thought," the team states. 



Changes in one part of the ocean can quickly affect distant regions. When the oceanic circulation is strong, it transfers a lot of heat to the <a href="https://www.earth.com/news/antarctic-warming-triggers-rising-north-atlantic-sea-levels/" target="_blank" rel="noreferrer noopener">North Atlantic</a>. 



But when it weakens, the surface of the ocean south of Greenland doesn't warm up as much, leading to what's called a "warming hole." Meanwhile, the South Atlantic ends up storing more heat and salt.



<h2 class="wp-block-heading" id="h-time-is-not-on-our-side">Time is not on our side</h2>



"Our simulations show changes in the far North Atlantic are felt in the South Atlantic Ocean in less than two decades," the researchers reveal. This means the effects of the slowdown are spreading faster than we thought.



Climate projections have suggested the Atlantic overturning circulation will weaken by about 30% by 2060. But hold on -- that's without considering all that extra meltwater.



"The Greenland ice sheet will continue melting over the coming century, possibly raising global sea level by about 4 inches," the study notes. 



"If this additional meltwater is included in climate projections, the overturning circulation will weaken faster. It could be 30% weaker by 2040. That's 20 years earlier than initially projected."



<h2 class="wp-block-heading" id="h-what-can-we-do">What can we do?</h2>



Such a rapid decrease in the overturning circulation will shake things up. 



Europe might see colder winters, the northern tropics could get drier, and places like the southern United States might experience warmer, wetter summers.



"Our climate has changed dramatically over the past 20 years," the researchers warn. "More rapid melting of the ice sheets will accelerate further disruption of the climate system."



So, what does this all mean for us? It means we have even less time to get our act together. Reducing emissions isn't just a good idea -- it's crucial.



Our planet's systems are interconnected in ways we're only beginning to understand. If we want to keep things from getting worse, we need to act now. Every little bit counts, and the clock is ticking.



The full study was published in the journal <a href="https://www.nature.com/articles/s41561-024-01568-1" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>.



-----



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



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



-----

Collapse of Earth's main ocean water circulation system is already happening

You probably know at least a little bit about ocean circulation around the world, also known as currents. In fact, you may have felt smaller currents yourself on a day at the beach. But have you heard bout the "great global ocean conveyor belt," which is a vast network of currents that constantly moves water around the entire planet? This massive system helps distribute heat around the world, influencing everything from temperatures to rainfall. Unfortunately, it's slowing down and on the verge of total collapse. Scientists have...

Largest Oil Companies Pledge Support For Paris Climate Conference. The chief executives of 10 of the world's largest oil companies have pledged support for an "effective" deal to fight global warming at a Paris conference next month.
In a statement Friday, the CEOs of BP, Shell, Saudi Aramco, Total, Repsol, Statoil, Eni, Petroelos Mexicanos, Reliance Industries and BG Group said they recognize greenhouse gas emissions trends are inconsistent with the ambition to keep warming below a level many consider dangerous.
Burning coal, oil and gas for energy is a key <a href="https://www.bing.com/search?q=emissions&amp;cvid=2aad6a7812594308915d9982c56dc09e&amp;FORM=ANAB01&amp;PC=HCTS">emissions</a> source.
The companies offered to help by reducing flaring and methane emissions from oil and gas operations. They also called for replacing coal with cleaner-burning natural gas in power generation.
<a href="http://www.earth.com/organizations/greenpeace-international/">Greenpeace</a> said the companies' offer "contains nothing meaningful" and accused them of undermining effective climate action. Largest Oil Companies Pledge Support For Paris Climate Conference.
Climate variability includes all the variations in the climate that last longer than individual weather events, whereas the term climate change only refers to those variations that persist for a longer period of time, typically decades or more. In the time since the industrial revolution the climate has increasingly been affected by human activities that are causing global warming and climate change.Climate change, periodic modification of <a class="md-crosslink" href="https://www.britannica.com/place/Earth">Earth</a>’s <a class="md-crosslink" href="https://www.britannica.com/science/climate-meteorology">climate</a> brought about as a result of changes in the <a class="md-crosslink" href="https://www.britannica.com/science/atmosphere">atmosphere</a> as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth system.
© 2015 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.

Largest Oil Companies Pledge Support For Paris Climate Conference

Largest Oil Companies Pledge Support For Paris Climate Conference. The...

Scientists: Use Carbon-Absorbing Crystals To Curb Global Warming "As far as I know this is the first material that captures CO2 in an efficient way," said researcher Osamu Terasaki.

Carbon-absorbing crystals probably won't stave off global warming, but they could help put a dent in carbon emissions.

Carbon capturing technologies are mostly too expensive, but a new discovery could change that.
<div class="ad_slot"></div>
Scientists in Sweden have developed a new type of synthetic crystal with carbon-capturing micropores. Researchers say the crystal can capture carbon dioxide more efficiently than similar materials, even in the presence of water.

Researchers have previously experimented with CO2 capturing materials as a potential tool against global warming, but the co-absorption of water inhibits the process. For these materials to work, gas must first be dehumidified. The added expense makes that technology unrealistic.Scientists: Use Carbon-Absorbing Crystals To Curb Global Warming

But scientists at the Stockholm University developed a microporous coppersilicate crystal with separate CO2 and H2O uptake locations. The crystal absorbs both carbon and water, but its CO2 absorption is unaffected.

And because the crystal was synthesized hydrothermally, the material remains stable even after its H2O absorption. Similar materials degrade as they take up water.

The new material is detailed <a class="tpstyle" href="http://www.sciencemag.org/content/350/6258/302.abstract?sid=fdc8505e-c912-43b6-ab0e-fc4af6a249b1" target="_blank" rel="noopener noreferrer">in the journal Science</a>.

"As far as I know this is the first material that captures CO2 in an efficient way in the presence of humidity," Osamu Terasaki, a material scientists and chemistry professor at Stockholm, said in a press release. "In other cases there is competition between water and carbon dioxide and water usually wins. This material adsorbs both, but the CO2 uptake is enormous."

The material could potentially be used to create filters on the top of smokestacks that prevent CO2 from escaping into the <a href="http://www.earth.com/news/earths-atmosphere-beyond-moon/">atmosphere</a> -- though there aren't specific plans for application in place.

"CO2 is always produced with moisture, and now we can capture CO2 from humid gases. Combined with other systems that are being developed, the waste carbon can be used for new valuable compounds," Terasaki said. "People are working very hard and I think we will be able to do this within five years. The most difficult part is to capture carbon dioxide, and we have a solution for that now."

---

Credit: UPI

Scientists: Use Carbon-Absorbing Crystals To Curb Global Warming

Scientists: Use Carbon-Absorbing Crystals To Curb Global Warming "As far...

Largest Oil Companies Pledge Support For Paris Climate Conference. The chief executives of 10 of the world's largest oil companies have pledged support for an "<a href="http://www.earth.com/news/fasting-diets-are-effective-for-weight-loss/">effective</a>" deal to fight global warming at a Paris conference next month.
In a statement Friday, the CEOs of BP, Shell, Saudi Aramco, Total, Repsol, Statoil, Eni, Petroelos Mexicanos, Reliance Industries and BG Group said they recognize greenhouse gas emissions trends are inconsistent with the ambition to keep warming below a level many consider dangerous.
Burning coal, oil and gas for energy is a key <a href="https://www.bing.com/search?q=emissions&amp;cvid=ef92c87eeea342e7889195dfa6dcade6&amp;FORM=ANAB01&amp;PC=HCTS">emissions</a> source. Largest Oil Companies Pledge Support For Paris Climate Conference
The companies offered to help by reducing flaring and methane emissions from oil and gas operations. They also called for replacing coal with cleaner-burning natural gas in power generation.
Greenpeace said the companies' offer "contains nothing meaningful" and accused them of undermining effective climate action.Paris is the capital and most populous city of France, with an estimated population of 2,148,271 residents as of 2020, in an area of 105 square kilometres. Since the 17th century, Paris has been one of Europe's major centres of finance, diplomacy, commerce, fashion, science and arts. The City of Paris is the centre and seat of government of the Île-de-France,
© 2015 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.

Climate Change Means Trouble For Coastal Redwood Forests. In a study published in the research journalGlobal Change Biology, climate scientists from the University of California, NatureServe and the German Centre for Integrative Biodiversity Research (iDiv) conclude that a warmer future with normal rainfall on California's coast will leave coastal redwood forests south of San Francisco Bay with significantly different climate than they have experienced for decades.

Fourteen redwood parks are located in this area, including Big Basin Redwoods in the Santa Cruz Mountains, Julia Pfeiffer Burns State Park south of Carmel, and Garrapata State Park between Carmel and Big Sur on the Monterey coast.

Scientists also predict that redwood forest bioclimate, marked by fog, ample winter rain and moderate year-round temperatures, will expand by 34 percent northward from the coast of California into southern Oregon.

"With warmer climate forecast for more than half the coast redwood range in the next 10-15 years, we are eager for research that helps identify those areas that are most sensitive to climate change," says Paul Ringgold, Chief Program Officer for San Francisco-based Save the Redwoods League, the land trust which catalyzed the study under its Redwoods and Climate Change Initiative (RCCI). "These key findings help us better understand the future impacts of climate change and how to manage for these impacts on our redwood forests."

"Redwoods will still exist in the most vulnerable areas, while continued research on changing redwood bioclimate will help us identify and address redwood forest regeneration challenges. Moreover, locally unique weather patterns such as fog may influence projected climate trends in the future," he says.

"Coast redwoods have endured climatic changes over thousands of years. We are encouraged by our RCCI research, which shows that redwood trees continue to grow, even under warmer conditions, and will thrive further north into Oregon."

Written by Miguel Fernandez, Healy Hamilton and Lara Kueppers and entitled "Back to the Future --using historical climate variation to project near-term shifts in habitat suitable for coast redwood," the study sifts through the range of climate change predictions from global circulation models and analyzes which ones are most likely to occur in coastal California's future.

"Current global climate models often fail to capture climate change's impact on local weather patterns," says Fernandez of the University of California and the German Centre for Integrative Biodiversity Research (iDiv). "This data is critical to predict how individual species, like the coast redwood, will cope with climate change."

Fernandez's team of researchers used historical climate extremes as indicators of short- and medium-term changes in future climate and modeled coast redwoods' geographic distribution in the smallest discernible detail.

"This approach is particularly suitable for regions such as North America's West Coast, where local conditions strongly influence climate," he says.

This is the seventh study funded by Save the Redwoods League's RCCI, a $4 million, multi-year research program whose mission is to study coast redwood and giant sequoia ecosystems in a changing world. Eight scientists from Humboldt State University, UC Berkeley, and UC Merced have undertaken research for RCCI producing four peer-reviewed papers since 2009.

---

<a href="http://www.idiv.de/" target="_blank" rel="noopener noreferrer">IDIV</a>

Climate Change Means Trouble For Coastal Redwood Forests

Climate Change Means Trouble For Coastal Redwood Forests. In a...

Last Round Of UN Climate Talks Before Paris Summit. U.N. climate negotiators will meet Monday for their last session ahead of a major conference in Paris to hammer out the details of what's envisioned to become the most ambitious agreement ever to fight global warming.
Delegates at the weeklong talks in Bonn,<a href="http://www.earth.com/video/the-frankfurt-rhine-main-region-of-germany/"> Germany</a>, are expected to start line-by-line editing a 20-page draft that still contains multiple options on how to reduce the greenhouse gas emissions that scientists say are warming the planet.
Some 150 countries - including top emitters China, the <a href="https://www.bing.com/search?q=united+states+map&amp;cvid=199c8730bfbc41c68f9a6630a19c64ad&amp;FORM=ANAB01&amp;PC=HCTS">United States</a>, the European Union and India - have already made voluntary pledges to cut or curb their emissions after 2020, when the deal is supposed to take effect. Last Round Of UN Climate Talks Before Paris Summit
But several analyses show those pledges won't be enough to prevent levels of warming that many consider dangerous, so a key element of the Paris deal would be a mechanism to raise those commitments over time.
"We don't want to make a picture, we want to make a movie," Netherlands climate envoy Michel Rentenaar said, insisting that the Paris agreement cannot freeze the current level of ambition on climate action.
The U.N. talks have made significant strides since a 2009 climate summit in Copenhagen failed to live up to expectations. For the first time all countries now agree they need to act against climate change, which scientists say is already transforming the planet through melting glaciers, rising sea levels, intensifying heat waves and warmer, more acidic oceans.
Though major sticking points remain, including how to spell out the different responsibilities of nations in various stages of development, rich and poor countries have moved closer in recent years.
"We have gone very far from the Copenhagen atmosphere," said Pa Ousman Jarju, Gambia's environment minister.
As always in the U.N. talks, which are based on consensus, there's a risk that a handful of countries block progress, he said. It would be a major setback if some countries reject the draft in Bonn, leaving negotiators with little time to come up with a new one before Paris.
Several delegates said they didn't expect that to happen, though they couldn't rule it out.
One of the most contentious issues is money. Rich countries have promised to provide $100 billion annually by 2020 to help poor countries reduce their emissions and deal with unavoidable impacts of climate change. But they are reluctant to make any commitments beyond that and say the most advanced developing nations should also chip in.
The World Resources Institute, a Washington-based environmental think tank, said negotiators must be prepared to get "their hands dirty" in Bonn and deal with the sticky issues before the Paris summit begins on Nov. 30.
"What happens in Bonn can pave the way for a universal agreement in Paris that can be the turning point on climate action that the world needs," the group said.
© 2015 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.

Last Round Of UN Climate Talks Before Paris Summit

Last Round Of UN Climate Talks Before Paris Summit. U.N....

Feds Are Pulling Back Oil Leases For The Arctic Ocean And Chukchi Sea. Three weeks after Royal Dutch Shell announced it was walking away from exploratory drilling in U.S. Arctic waters, the Obama administration has taken steps to keep drill rigs out of Alaska's northern ocean for a decade or more.
Interior Secretary Sally Jewell announced Friday that the federal government is cancelling federal petroleum lease sales in U.S. <a href="http://www.earth.com/news/arctic-rivers-heat-up-the-ocean-and-shrink-sea-ice/">Arctic</a> waters that were scheduled for 2016 and 2017.
Jewell said the Chukchi Sea off Alaska's northwest coast and the <a href="https://www.bing.com/search?q=beaufort+sea&amp;cvid=a9ae0014fcfa4daebd4b0c09de9a1d95&amp;FORM=ANAB01&amp;PC=HCTS">Beaufort Sea</a> off the state's north coast will not be included in the agency's next five-year lease sale plan. Current leases held by Shell and other companies in Arctic waters will not be extended, she added.
The Beaufort Sea leases are set to expire in 2017, and the Chukchi Sea leases in 2020.
The decision reflects current market conditions and low industry interest, Jewell said in a news release.
"In light of Shell's announcement, the amount of acreage already under lease and current market conditions, it does not make sense to prepare for lease sales in the Arctic in the next year and a half," she said.
Shell was the only company actively exploring in U.S. Arctic waters, and it was in with both feet. The company estimates it has spent upward of $7 billion on Arctic offshore development, including $2.1 billion in one day for leases at a 2008 Chukchi Sea sale.
Shell hoped to tap into a resource the U.S. Geological survey estimates at more than 26 billion barrels of conventionally recoverable oil under Arctic waters.
However, the company announced Sept. 28 that an exploratory well drilled this summer had been a bust. Shell found oil and gas but not in commercial quantities. Shell said it was stopping exploration "for the foreseeable future" because of the disappointing results and the uncertain federal regulatory environment.
Shell, however, had applied to extend leases in both the Chukchi and the Beaufort. Statoil, an oil and gas company based in Norway, requested an extension for Chukchi leases.
Shell spokesman Curtis Smith said the company disagrees with the agency's decision not to extend current leases.
"When it comes to frontier exploration in Alaska, one size does not fit all," Smith said by email. "We continue to believe the 10-year primary lease term needs to be extended."
In denying the extension, the Bureau of Safety and Environmental Enforcement's regional supervisor for field operations, Kevin Pendergast, said Shell had not met the criteria to extend its leases, including providing the agency with a work schedule on them. Shell could apply again, he said.
Environmental groups strongly oppose drilling. They say industrial activity will harm marine mammals already hurt by a loss of sea ice and a spill could not be cleaned in ice-choked Arctic waters. They also said burning Arctic Ocean oil would accelerate global warming.
"This is great for the Arctic and its polar bears," said Miyoko Sakashita of the Center for Biological Diversity. "We need to keep all the Arctic oil in the ground."
"Secretary Jewell's decisions today are consistent with the law as well as economic and environmental realities," said Mike LeVine of oceans advocate Oceana. Feds Are Pulling Back Oil Leases For The Arctic Ocean And Chukchi Sea
As much as 90 percent of Alaska state revenue is generated by the petroleum industry. The state faces a deficit in the billions between projected spending and revenue because of low oil prices.
Gov. Bill Walker, an independent, personally lobbied Jewell to extend Shell's leases. His goal is to get more oil in the trans-Alaska pipeline, which is running at about a quarter of its capacity. Walker said the Interior Department's decision left him with a "loss of hope, in some respects" about accomplishing that.
Sen. Dan Sullivan, R-Alaska, said the Obama administration just robbed Alaskans of a lot of economic hope, at a time when the administration has vowed to help the state fight high rates of suicide, domestic violence and addiction.
"They just took real opportunity, significant opportunities that could benefit thousands if not tens of thousands of Alaskans off the table," Sullivan said. "That's not going to help the social problems. That's actually going to make them worse."
Rep. Don Young, who is the longest-serving Republican in the U.S. House, said the battle will likely end up in court.
"I think this administration is adamantly opposed against fossil fuels, period," said Young, Alaska's sole representative in the House. "They'll do anything to stop it. I don't think they have a legal leg to stand on."
But Democratic Sen. Jeff Merkley of Oregon said the decision was a victory for the millions of Americans who raised their voices against Arctic offshore drilling.
"The simple fact is that drilling in the Arctic is the height of irresponsibility," he said.
---
Associated Press writer Mark Thiessen in Anchorage contributed to this report.
© 2015 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.

Feds Are Pulling Back Oil Leases For The Arctic Ocean And Chukchi Sea

Feds Are Pulling Back Oil Leases For The Arctic Ocean...

Scientists Focus On Formation Of A Cold Water Climate Shield. Federal scientists using new technologies have mapped what is being called a Cold Water Climate Shield, an area spanning five western states that could support viable populations of native species if the region continues its warming trend.
Mapping the cold-water refuges for cutthroat trout, a favored sport fish among anglers, and threatened bull trout could help resource managers make decisions aimed at preserving populations of those and other cold-water native species in Idaho, Oregon, Washington, Montana and Wyoming.
Scientists say streams in the region have warmed up about a degree over the last three decades and are getting hotter. Scientists Focus On Formation Of A Cold Water
"One of the things we're seeing is that the colder areas are typically in the headwaters," said Dan Isaak, a research fisheries biologist with the U.S. Forest Service in Boise. "Those are warming up a lot more slowly than streams at lower elevations."
The mapped area contains streams with temperatures preferred by cutthroat trout and bull trout but are too cold for non-native species, particularly brown trout and brook trout, thus forming the climate shield. The climate shield has practical applications, Isaak said.
"Rather than spending money to build artificial barriers on streams to prevent the upstream advance of invasive species (which is very expensive and commonly done in some areas), the climate refugia streams we're highlighting are so cold that you wouldn't need to build a barrier to preserve the native community," Isaak said in an email to The Associated Press.
Within this climate shield, scientists say some areas will remain capable of supporting bull trout even if the more extreme future climate models turn out accurate.
"It's quite possible much of the habitat for bull trout will become too warm," and it will disappear from those areas, said Mike Young, a research fisheries biologist for the U.S. Forest Service based in Missoula, Montana, also working on the climate shield. "But we think that even under extreme climate scenarios bull trout will persist in the lower 48."
Advances in stream temperature sensors and environmental <a href="https://www.bing.com/search?q=dna&amp;cvid=3b65ccfb48b24cc7866b01f48bf96b55&amp;FORM=ANAB01&amp;PC=HCTS">DNA</a> sampling, a new way to find out what species inhabit a stream, have provided a flood of information and allowed scientists to create the climate shield map.
Temperature sensors are glued to underwater rocks and can store hourly temperature recordings for a year. About 4,000 of the sensors are in streams in the five states. Isaak said there are about 16,000 more unique sites recording information less frequently plus information going back even further.
In total, he said, scientists have about 50 million hourly temperature recordings.
The other part of the Cold Water <a href="http://www.earth.com/news/great-tits-can-adapt-to-climate-change-but-only-to-a-point/">Climate</a> Shield involves environmental DNA sampling. That began about eight years ago and has radically changed how scientists survey streams. Rather than electroshocking stream sections and seeing what floats to the top, scientists can take a water sample and check it to see if a particular species is present.
"It's not only better, but it costs less," Young said. "You can suddenly afford to go places and sample very broadly."
The result is that entire river basins can be sampled, meaning streams that have never been sampled have now been analyzed or soon will be, Young said. That information could then be used for making decisions about where biologists should try to remove non-native brook trout, for example.
"Being able to make wise conservation investments is one of the most important things that we can do when protecting the biodiversity that we have," Young said.
Isaak said the Cold Water Climate Shield idea is being taken up in other western states as well, but is mostly just getting started in those areas.
© 2015 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.

Scientists Focus On Formation Of A Cold Water

Scientists Focus On Formation Of A Cold Water Climate Shield....

Scientists Focus On Formation Of A Cold Water Climate Shield. Federal scientists using new technologies have mapped what is being called a Cold Water Climate Shield, an area spanning five western states that could support viable populations of native species if the region continues its warming trend.
Mapping the cold-water refuges for cutthroat trout, a favored sport fish among anglers, and threatened bull trout could help resource managers make decisions aimed at preserving populations of those and other cold-water native species in Idaho, Oregon, Washington, Montana and Wyoming. Scientists Focus On Formation Of A Cold Water Climate Shield
Scientists say streams in the region have warmed up about a degree over the last three decades and are getting hotter.
"One of the things we're seeing is that the colder areas are typically in the headwaters," said Dan Isaak, a research fisheries <a href="http://www.earth.com/news/sick-endangered-orca-whale/">biologist</a> with the U.S. Forest Service in Boise. "Those are warming up a lot more slowly than streams at lower elevations."
The mapped area contains streams with temperatures preferred by cutthroat trout and bull trout but are too cold for non-native species, particularly brown trout and brook trout, thus forming the climate shield. The climate shield has practical applications, Isaak said.
"Rather than spending money to build artificial barriers on streams to prevent the upstream advance of invasive species (which is very expensive and commonly done in some areas), the climate refugia streams we're highlighting are so cold that you wouldn't need to build a barrier to preserve the native community," Isaak said in an email to The Associated Press.
Within this climate shield, scientists say some areas will remain capable of supporting bull trout even if the more extreme future climate models turn out accurate.
"It's quite possible much of the habitat for bull trout will become too warm," and it will disappear from those areas, said Mike Young, a research fisheries biologist for the U.S. Forest Service based in Missoula, Montana, also working on the climate shield. "But we think that even under extreme climate scenarios bull trout will persist in the lower 48."
Advances in stream temperature sensors and environmental DNA sampling, a new way to find out what species inhabit a stream, have provided a flood of information and allowed scientists to create the climate shield map.
Temperature sensors are glued to underwater rocks and can store hourly temperature recordings for a year. About 4,000 of the sensors are in streams in the five states. Isaak said there are about 16,000 more unique sites recording information less frequently plus information going back even further.
In total, he said, scientists have about 50 million hourly temperature recordings.
The other part of the Cold Water <a href="https://www.bing.com/search?q=climate&amp;cvid=7fc335b90dfd4ab096b619f12ddd4646&amp;FORM=ANAB01&amp;PC=HCTS">Climate</a> Shield involves environmental DNA sampling. That began about eight years ago and has radically changed how scientists survey streams. Rather than electroshocking stream sections and seeing what floats to the top, scientists can take a water sample and check it to see if a particular species is present.
"It's not only better, but it costs less," Young said. "You can suddenly afford to go places and sample very broadly."
The result is that entire river basins can be sampled, meaning streams that have never been sampled have now been analyzed or soon will be, Young said. That information could then be used for making decisions about where biologists should try to remove non-native brook trout, for example.
"Being able to make wise conservation investments is one of the most important things that we can do when protecting the biodiversity that we have," Young said.
Isaak said the Cold Water Climate Shield idea is being taken up in other western states as well, but is mostly just getting started in those areas.
© 2015 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.

Scientists Focus On Formation Of A Cold Water Climate Shield

Global Tension In Latest Round Of UN Climate Talks. African countries on Sunday dismissed an early draft of a U.N. climate accord as "unbalanced" and demanded amendments to even consider it at the final negotiating session before a landmark conference in Paris.
The move by the African bloc came on the eve of week-long talks in Bonn, Germany, on what's envisioned to become the most ambitious agreement ever to fight global warming. Global Tension In Latest Round Of UN Climate Talks
Delegates on Monday were supposed to start line-by-line editing a 20-page draft that contains multiple options on how to reduce the greenhouse gas emissions that scientists say are warming the planet.
But the <a href="http://www.earth.com/news/african-forest-elephants-are-running-out-of-fruit/">African</a> countries, many of which are among the most vulnerable to climate impacts such as desertification and sea level rise, said the draft "cannot be used as a basis for negotiation, as it is unbalanced, and does not reflect the African Group positions, and crosses the group's redlines."
Group spokesman Seyni Nafo told The Associated Press that the African countries want more emphasis on financial support to help poor countries cope with climate change.
Nafo said the group was confident that it would be allowed to make additions to the text before negotiations get underway.
"Our position is not to delay work, but to ensure that there's a fair basis for all," he said.
Some 150 countries - including top emitters China, the <a href="http://www.earth.com/image/severe-fire-threat-continues-in-the-western-united-states/">United States</a>, the European Union and India - have already made voluntary pledges to cut or curb their emissions after 2020, when the deal is supposed to take effect.
But several analyses show those pledges won't be enough to prevent levels of warming that many consider dangerous, so a key element of the <a href="https://www.bing.com/search?q=paris&amp;cvid=ee88ec5cb4884ee587d311888b45bdd9&amp;FORM=ANAB01&amp;PC=HCTS">Paris</a> deal would be a mechanism to raise those commitments over time.
"We don't want to make a picture, we want to make a movie," Netherlands climate envoy Michel Rentenaar said, insisting that the Paris agreement cannot freeze the current level of ambition on climate action.
The U.N. talks have made significant strides since a 2009 climate summit in Copenhagen failed to live up to expectations. For the first time all countries now agree they need to act against climate change, which scientists say is already transforming the planet through melting glaciers, rising sea levels, intensifying heat waves and warmer, more acidic oceans.
Though major sticking points remain, including how to spell out the different responsibilities of nations in various stages of development, rich and poor countries have moved closer in recent years.
"We have gone very far from the Copenhagen atmosphere," said Pa Ousman Jarju, Gambia's environment minister.
It would be a major setback if some countries reject the draft in Bonn, leaving negotiators with little time to come up with a new one before Paris.
Several delegates said they didn't expect that to happen, though the African move on Sunday underscored how easily the process, which is based on consensus, can be slowed down.
One of the most contentious issues is money. Rich countries have promised to provide $100 billion annually by 2020 to help poor countries reduce their emissions and deal with unavoidable impacts of climate change. But they are reluctant to make any commitments beyond that and say the most advanced developing nations should also chip in.
The World Resources Institute, a Washington-based environmental think tank, said negotiators must be prepared to get "their hands dirty" in Bonn and deal with the sticky issues before the Paris summit begins on Nov. 30.
"What happens in Bonn can pave the way for a universal agreement in Paris that can be the turning point on climate action that the world needs," the group said.
© 2015 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.

Global Tension In Latest Round Of UN Climate Talks

Global Tension In Latest Round Of UN Climate Talks. African...

European Union Greenhouse Gas Emissions Down 23 Percent. The European Union, the world's No. 3 greenhouse gas polluter, says its emissions fell 4 percent last year, meaning the 28-nation bloc has already surpassed its target for 2020.
A report by the EU's <a href="https://www.bing.com/search?q=climate+change&amp;cvid=2c806419f248480abd97bdeedbff525c&amp;FORM=ANAB01&amp;PC=HCTS">environment</a> agency on Tuesday said 2014 emissions were 23 percent lower than in 1990. The EU's goal is to achieve 20 percent reductions by 2020, but the report said the bloc is headed for 24-25 percent cuts with current measures to fight climate change.
It said the drop in 2014 "was partly due to an unusually warm year, which lowered energy demand." European Union Greenhouse Gas <a href="http://www.earth.com/news/wooden-buildings-could-store-half-of-the-cement-industrys-co2-emissions/">Emissions</a> Down 23 Percent
EU Climate Commissioner Miguel Arias Canete called the results "a strong signal" ahead of a December climate conference in Paris that "Europe stands by its commitments and that our climate and energy policies work."Human activities since the beginning of the <a title="Industrial Revolution" href="https://en.wikipedia.org/wiki/Industrial_Revolution">Industrial Revolution</a> (around 1750) have produced a 45% increase in the <a title="Carbon dioxide in Earth's atmosphere" href="https://en.wikipedia.org/wiki/Carbon_dioxide_in_Earth%27s_atmosphere">atmospheric concentration of carbon dioxide</a>, from 280 <a class="mw-redirect" title="Parts per million" href="https://en.wikipedia.org/wiki/Parts_per_million">ppm</a> in 1750 to 415 ppm in 2019. The last time the atmospheric concentration of carbon dioxide was this high was over 3 million years ago. This increase has occurred despite the uptake of more than half of the emissions by various natural "sinks" involved in the <a title="Carbon cycle" href="https://en.wikipedia.org/wiki/Carbon_cycle">carbon cycle</a>.
© 2015 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.

European Union Greenhouse Gas Emissions Down 23 Percent

European Union Greenhouse Gas Emissions Down 23 Percent. The European...

Global Tension In Latest Round Of UN Climate Talks. African countries on Sunday dismissed an early draft of a U.N. climate accord as "unbalanced" and demanded amendments to even consider it at the final negotiating session before a <a href="http://www.earth.com/video/central-italy-from-space/">landmark</a> conference in Paris.
The move by the African bloc came on the eve of week-long talks in Bonn, Germany, on what's envisioned to become the most ambitious agreement ever to fight global warming. Global Tension In Latest Round Of UN Climate Talks
Delegates on Monday were supposed to start line-by-line editing a 20-page draft that contains multiple options on how to reduce the greenhouse gas emissions that scientists say are warming the planet.
But the African countries, many of which are among the most vulnerable to climate impacts such as desertification and sea level rise, said the draft "cannot be used as a basis for negotiation, as it is unbalanced, and does not reflect the African Group positions, and crosses the group's redlines."
Group spokesman Seyni Nafo told The Associated Press that the African countries want more emphasis on financial support to help poor countries cope with <a href="https://www.bing.com/search?q=climate+change&amp;cvid=2c806419f248480abd97bdeedbff525c&amp;FORM=ANAB01&amp;PC=HCTS">climate</a> change.
Nafo said the group was confident that it would be allowed to make additions to the text before negotiations get underway.
"Our position is not to delay work, but to ensure that there's a fair basis for all," he said.
Some 150 countries - including top emitters China, the United States, the European Union and India - have already made voluntary pledges to cut or curb their emissions after 2020, when the deal is supposed to take effect.
But several analyses show those pledges won't be enough to prevent levels of warming that many consider dangerous, so a key element of the Paris deal would be a mechanism to raise those commitments over time.
"We don't want to make a picture, we want to make a movie," Netherlands climate envoy Michel Rentenaar said, insisting that the Paris agreement cannot freeze the current level of ambition on climate action.
The U.N. talks have made significant strides since a 2009 climate summit in Copenhagen failed to live up to expectations. For the first time all countries now agree they need to act against climate change, which scientists say is already transforming the planet through melting glaciers, rising sea levels, intensifying heat waves and warmer, more acidic oceans.
Though major sticking points remain, including how to spell out the different responsibilities of nations in various stages of development, rich and poor countries have moved closer in recent years.
"We have gone very far from the Copenhagen atmosphere," said Pa Ousman Jarju, Gambia's environment minister.
It would be a major setback if some countries reject the draft in Bonn, leaving negotiators with little time to come up with a new one before Paris.
Several delegates said they didn't expect that to happen, though the African move on Sunday underscored how easily the process, which is based on consensus, can be slowed down.
One of the most contentious issues is money. Rich countries have promised to provide $100 billion annually by 2020 to help poor countries reduce their emissions and deal with unavoidable impacts of climate change. But they are reluctant to make any commitments beyond that and say the most advanced developing nations should also chip in.
The World Resources Institute, a Washington-based environmental think tank, said negotiators must be prepared to get "their hands dirty" in Bonn and deal with the sticky issues before the Paris summit begins on Nov. 30.
"What happens in Bonn can pave the way for a universal agreement in Paris that can be the turning point on climate action that the world needs," the group said.
© 2015 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.

Dali Lama Urges Strong Action Against Global . The Dalai Lama on Tuesday urged strong global action to limit global warming and to protect fragile environments, including the Himalayan glaciers and Tibetan plateau.
Calling climate change a "problem which human beings created," the 80-year-old Tibetan Buddhist spiritual leader said all of humanity was now responsible for taking action. But instead, he said, "we are relying on praying to God or to <a href="https://www.bing.com/search?q=buddha&amp;cvid=16c6da95d7b141678137b9e19639b35c&amp;FORM=ANAB01&amp;PC=HCTS">Buddha</a>. Sometimes I feel this is very illogical."
He issued his plea in a pre-taped video released as part of a campaign launched by the Tibetan government-in-exile in the north Indian hill town of Dharmsala, where the Dalai Lama has been based since fleeing a <a href="http://www.earth.com/news/carbon-pricing-will-help-achieve-net-zero-emissions/">Chinese</a> military crackdown in Tibet. Dali Lama Urges Strong Action Against Global Warming
The government-in-exile said the campaign would continue through this year's U.N. climate change talks, where nations hope to conclude a new treaty for limiting climate-warming gas emissions. The exiled government will also send its own delegate to the talks, which start Nov. 30 in Paris, though it will not have a vote of its own.
"This is not a question of one nation or two nations. This is a question of humanity. Our world is our home," the Dalai Lama said. "There's no other planet where we may move or shift."
Acknowledging his advanced years, the Dalai Lama appealed to younger generations to "take a more active role in protecting this planet, including the Tibetan plateau."
Temperatures for Tibet's high-altitude plateau - referred to as the Roof of the World - are rising about three times faster than the global average, and are 1.3 degrees Celsius higher than they were 50 years ago. The Himalayas are also called the Third Pole, referring to the fact that they are covered in snow and ice and are particularly susceptible to climate change, like the North and South poles.
The government-in-exile also argued that Tibetans should be restored as the "true stewards" of the plateau, which has been under Chinese rule for decades and where Tibetans accuse Beijing of mining indiscriminately while forcing nomadic communities to move elsewhere.
"Tibetans must have a say on what happens on their land," said the exiled government's prime minister, Lobsang Sangay. "Tibetan nomads are the expert custodians of the alpine pastures, and their knowledge and experience must be recognized."
China has long understood the plateau's environmental importance and vulnerability, with some 40 percent of the world's fresh water locked into the frozen Himalayan glaciers and feeding seven major rivers that run through China, Nepal, India, Pakistan and Bangladesh.
The Chinese Academy of Sciences studies environmental and climate change from its Institute of Tibetan Plateau Research in the region - a 2.5 million-square-kilometer (966,000-square-mile) area that includes the Tibetan Autonomous Region as well as most of China's Qinghai province, parts of Sichuan and the southern Uygur Autonomous Region of Xinjiang.
Up to 70 percent of the plateau is covered in permafrost, with large reserves of both carbon dioxide and methane trapped within the ice. Scientists say thawing could release long-stored emissions of both greenhouse gases. Methane can be 30 times more potent than carbon dioxide at trapping Earth's heat.
---
Associated Press writer Ashwini Bhatia contributed to this report.
---
Follow Katy Daigle on Twitter at <a href="http://twitter.com/katydaigle" target="_blank" rel="noopener noreferrer">http://twitter.com/katydaigle</a>
© 2015 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.

Dali Lama Urges Strong Action Against Global

Dali Lama Urges Strong Action Against Global . The Dalai...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image Credit: ESA



---



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

Nushagak Bay in southwest Alaska

[sendtonews key="0ynNMYkMKa-2340414-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image Credit: American Chemical Society&nbsp;



---



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



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

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="3upvlAaHgO-2256633-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&nbsp;



---



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

Lake Trasimeno in Central Italy

[sendtonews key="3upvlAaHgO-2256633-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



Video Credit: American Chemical Society&nbsp;



---



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



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

Detecting mercury contamination with the tap of a finger

[sendtonews key="LvS8v8bp9z-2564889-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&nbsp;



---



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



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

Kainji Lake in north central Nigeria

[sendtonews key="iuA5mpp3jv-1641775-12187" type="single"] Today’s Video of the Day from the...

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



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



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



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



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



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



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



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



Video Credit: Amanda Nguyen/University of Illinois



---



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



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

Designing crops that can beat the heat

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



---



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.

How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="JRaP49ISmm-2357509-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image Credit: ESA



---



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



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

Santiago, Chile in South America

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

Spiral,Galaxy,,Illustration,Of,Milky,Way

<div class="wp-block-sendtonews-playerselector">[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"]</div>



Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&nbsp;



---



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



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

Interactive map of the universe includes 200,000 galaxies

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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



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



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



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



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



Video Credit: NASA Goddard&nbsp;



---



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



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

Remote sensing will revolutionize the way we monitor trees

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



Video Credit: ESA&nbsp;



---



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



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

The city of Dublin on Ireland's east coast

[sendtonews key="qjvhBOBnY8-2426650-12187" type="single"] Today's Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"]</div>



Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image Credit: ESA



---



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



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

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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



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



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



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



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



Video Credit: NASA Goddard



---



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



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

Wetlands are a major source of methane emissions

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

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



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



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



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



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



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



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



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



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



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



---



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



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

The rapid retreat of the Columbia Glacier

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

<div class="wp-block-sendtonews-playerselector">[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"]</div>



Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image Credit: ESA



---



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



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

The Pyrenees Mountains in southwest Europe

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

<div class="wp-block-sendtonews-playerselector">[sendtonews key="0dEcERCq61-2283382-12187" type="single"]</div>



Today’s Video of the Day from <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&nbsp;



---



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



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

How the immune system responds to injury

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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



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



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



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



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



Video/ Image Credit: NASA Goddard



---



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



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

2022 illustrated the consequences of a warming climate

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

Earth,Like,Exoplanet,3d,Render

<div class="wp-block-sendtonews-playerselector">[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"]</div>



Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



---



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.

Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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



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



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



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



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



Video Credit: NASA Goddard&nbsp;



---



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



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

Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



---



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



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

Tiger sharks are shifting poleward as temperatures rise

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