Legends about a boiling, scalding river that roasts anything that falls inside may sound like fiction. Yet nestled in the Peruvian rainforest, a curious waterway <a href="https://www.ted.com/talks/andres_ruzo_the_boiling_river_of_the_amazon" target="_blank" rel="noreferrer noopener">proves</a> these stories are far from mythical.



Its waters can reach 210°F, a temperature that can cause severe burns within seconds. For decades, local communities spoke of a place so hot that small <a href="https://www.earth.com/news/cold-shocks-in-the-amazon-how-do-wild-animals-respond/" target="_blank" rel="noreferrer noopener">animals perish</a> upon touching its surface.



<h2 class="wp-block-heading" id="h-the-boiling-river-in-peru">The "Boiling River" in Peru</h2>



The "Boiling River" is located in the Mayantuyacu region of central Peru. The river’s length is around 4 miles, and it can be up to about 20 feet wide in some sections.



A team of scientists led by <a href="https://www.rileyfortier.com/" target="_blank" rel="noreferrer noopener">Riley Fortier</a>, a graduate student at the <a href="https://welcome.miami.edu/" target="_blank" rel="noreferrer noopener">University of Miami</a>, surveyed 70 sites along this tributary. 



"It really provides us a window into the future because the Amazon will get hotter whether we like it or not, so this allows us to understand what increases in temperature will do to the forest composition," said Riley Fortier, lead author on a study of the site published in <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcb.17555" target="_blank" rel="noreferrer noopener">Global Change Biology</a>, and a graduate student in professor Kenneth Feeley's <a href="https://www.junglebiology.org/" target="_blank" rel="noreferrer noopener">Jungle Biology lab</a>.



The team wanted to see how extreme heat shapes the surrounding forest.



By mapping the tree and plant species from cooler upstream areas down to the scalding heart of the river, they discovered a startling drop in biological variety. 



Findings <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcb.17555" target="_blank" rel="noreferrer noopener">showed</a> an 11% decline in biodiversity for each 1.8°F rise in average temperature.



<h2 class="wp-block-heading" id="h-why-the-boiling-river-boils">Why the boiling river boils</h2>



Geoscientists attribute the heat to fault-fed activity, where underground water channels meet Earth’s geothermal energy. 



A fault is a <a href="https://www.usgs.gov/faqs/what-a-fault-and-what-are-different-types" target="_blank" rel="noreferrer noopener">large fracture</a> in the crust that provides a direct path for scorching fluid to surge toward the surface.



Researchers believe that rainwater infiltrating sedimentary rock becomes superheated below ground. It then emerges as a system of hot springs converging with the main watercourse, creating a natural cauldron.



“You stick your hand in, and you will see second or third degree burns in a matter of seconds,” said Ruzo, who first measured the river’s peak heat. 



<h2 class="wp-block-heading" id="h-signs-of-changing-forests">Signs of changing forests</h2>



Many local inhabitants regard the site with deep respect because anything that wanders too close risks a painful encounter.



Certain plants thrive on the fringes, but most large creatures struggle with the sweltering <a href="https://www.earth.com/news/tiny-microbes-in-amazon-peatlands-help-balance-the-global-climate/" target="_blank" rel="noreferrer noopener">environment</a>. Adaptations are limited for organisms facing water that can reach coffee-brewing temperatures.



"Overall, the tree community is less diverse, so we see fewer species in hotter spots," Fortier said. "And forest composition was also more homogenous in the warmest locations, whereas in cooler forest plots, there was more plant diversity."



Botanical surveys from cooler sections toward the hotter stretches revealed how tree diversity narrows. In place of thick canopies, the research team documented more scrubby <a href="https://www.earth.com/news/rainforest-trees-use-rivers-as-highways-for-migration/" target="_blank" rel="noreferrer noopener">vegetation</a>.



"Over the course of dozens of miles, you might expect to see dramatic changes like that, but in the small sampling area that we had, you typically wouldn't see such a clear change in composition," Fortier added.



Small species adapted to drought-like conditions gained ground as the mercury rose. Larger, slower-growing trees faded away, reflecting how intense heat reshapes even lush ecosystems.



<h2 class="wp-block-heading" id="h-boiling-rivers-and-future-climate">Boiling rivers and future climate</h2>



Fortier’s data suggest that as worldwide temperatures climb, similar shifts could spread across other <a href="https://www.earth.com/news/the-amazon-rainforest-is-approaching-widespread-collapse/" target="_blank" rel="noreferrer noopener">lowland rainforests</a>.



Changes may include declines in species that cannot handle additional heat and a rise in those more comfortable with higher temperatures.



Scientists note that an environment featuring fewer tree varieties will likely support fewer types of animals too. The loss of one group often sends ripples through the entire food web.



The boiling tributary, known locally as <a href="https://shanaytimpishka.com/" target="_blank" rel="noreferrer noopener">Shanay-Timpishka</a>, meaning “boiled with the heat of the sun,” stands as a stark example of what could happen if average temperatures continue to climb. 



Areas that were once rich in wildlife may morph into simpler, drier landscapes. Observers hope that studying this natural hotspot will inspire careful planning to protect sensitive habitats. 



Even though the river is unique, it signals what may lie ahead for places currently seen as safe havens for biodiversity.



<h2 class="wp-block-heading" id="h-ongoing-investigations">Ongoing investigations</h2>



Researchers plan to gather long-term data and explore whether <a href="https://www.earth.com/news/nearly-40-of-climate-critical-amazon-rainforest-is-unprotected/" target="_blank" rel="noreferrer noopener">flora and fauna</a> can adapt to persistently higher temperatures. They will also watch for signs of any species shifting to cooler pockets.



Some scientists are examining whether the warming patterns near this location might parallel broader trends in tropical zones. 



They predict that more forests around the globe could face intense thermal stress, forcing communities to adapt or relocate.



Feeley's lab will continue its research of the boiling river, since it is such a unique place that could portend much about our natural world.



"You can't heat a whole forest, at least not artificially, which is one of the coolest aspects of the boiling river," Fortier added.



The study is published in <a href="https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcb.17555" target="_blank" rel="noreferrer noopener">Global Change Biology</a>.



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One river in the Amazon rainforest is so hot that it literally boils, destroying nearby biodiversity

Legends about a boiling, scalding river that roasts anything that falls inside may sound like fiction. Yet nestled in the Peruvian rainforest, a curious waterway proves these stories are far from mythical. Its waters can reach 210°F, a temperature that can cause severe burns within seconds. For decades, local communities spoke of a place so hot that small animals perish upon touching its surface. The "Boiling River" in Peru The "Boiling River" is located in the Mayantuyacu region of central Peru. The river’s length is around 4...

Storage technologies for renewable energy can pay off. Utility companies or others planning to install renewable energy systems such as solar and wind farms have to decide whether to include large-scale energy storage systems that can capture power when it's available and release it on demand. This decision may be critical to the future growth of renewable <a href="https://www.bing.com/search?q=energy&amp;form=EDGEAR&amp;qs=PF&amp;cvid=7584a64c36474716928a103289c9e04b&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOMAjS%21RFp6jzZWJ7AkCsIYKjvYrDQ9iPkO5GwEz8v6YZbU4sCLLmhz5S9Ye6gBv3Pe81apdkQqWx7ZGB%21%21FTZwC&amp;plvar=0&amp;PC=HCTS">energy</a>.

The choices can be complicated: Would such a system actually pay for itself through increased revenues? If so, which kind of system makes the most sense, and which features of the system are most important? If not, how much cheaper do storage technologies need to be?

A new study by researchers at MIT shows how to evaluate the technology choices available, including batteries, pumped hydroelectric storage, and compressed air energy storage, and demonstrates that even with today's prices for these technologies, such storage systems make good economic sense in some locations, but not yet in others. The study, by Jessika Trancik, the <a href="http://www.earth.com/image/atlantic-coastline-southern-brazil/">Atlantic</a> Richfield Career Development Assistant Professor of Energy Studies at MIT, and graduate students William Braff and Joshua Mueller, was just published in the journal Nature Climate Change.

"Researchers and practitioners have struggled to compare the costs of different storage technologies," Trancik explains, "because of the multiple dimensions of cost and the fact that no technology dominates along all dimensions. Storage technologies can only be compared by looking at the contexts in which they are going to be used." But the study found that regardless of the particular circumstances at a given location, certain features of how electricity prices fluctuate are common across locations and do favor some specific types of storage solutions over others.

Selling at the peak price

For example, the team found that in Texas today, pumped hydro systems can provide added value today for solar or wind installations. In these systems, excess power is used to pump water uphill to a reservoir for storage, and then the water is released through a turbine to generate power when it is needed. The increased revenue the plant can produce, by waiting to sell the power into the grid until spot-prices for electricity -- the constantly-changing market rate that electricity distributors pay to producers -- are at their peak, would exceed the costs of the added storage system.

Further, they found that such pumped hydro storage provides more value than a storage system using lead-acid batteries even though its power capacity components would cost several times more. This is because a pumped hydro system has lower energy-capacity costs than lead-acid battery system. (Energy capacity refers to the overall amount of energy that can be stored in the system, and power capacity refers to how much energy can be delivered at a given moment from that system). A compressed air storage system could also add value comparable to that of the pumped hydro system. However, batteries are attractive, the researchers note, because they can be installed essentially anywhere and do not rely on natural features that exist only in some locations.

The researchers point out that much research on storage systems for renewable energy sources has focused on using the systems to smooth out the intermittent outputs to better match fluctuating demand. But in practice, most of these wind or solar farms are feeding into the grid, so what matters to potential investors is the price curve rather than the demand curve.

Surprisingly, it turned out that despite wide regional variations in the average prices and the amount of variability in demand and pricing, "the best storage technology in one location is also the best in the other," Trancik says. "This is because of the similarity across locations in the distribution of the duration of electricity price spikes. This pattern likely emerges because of constraints imposed by the daily cycle, and similarities in when people go to work and go home, and generally how they spend their time."

Whether an energy storage system is worth the cost today varies widely by location, because of large variations in the frequency and magnitude of spikes in the price and how the solar and wind resources fluctuate over time, she says. But the cost characteristics of the optimal storage systems are similar in all locations, the researchers found, because of certain common, emergent properties of electricity price fluctuations.

"This means that these results can be used to inform investments in storage technology development by the private sector and government, and can inform engineering efforts in the lab," Trancik says. "The results would have been less general and less useful to technology development efforts if we'd found that the direction of optimal cost improvement, trading off energy capacity and power capacity costs, was different across locations."

Costs still need to drop

At this time, the study found, the costs of such systems don't yet make them profitable enough without policy support to enable the kind of widespread adoption that is needed to make a large dent in global greenhouse gas emissions. But, Trancik says, this study does suggest that market adoption already makes sense in some locations, and could be boosted with modest public policy support, which in turn would stimulate technological improvement in storage to encourage further growth. The study also provides guidance on how much the costs of a given technology need to be brought down in order to enable such deployment, and which aspects of the system need the greatest improvement -- and thus, where research needs to be focused. For example it provides cost targets for various flow batteries that are in development.

For this study, the team examined three states: Texas, California, and Massachusetts. They found storage systems make economic sense today in Texas and California but not yet in Massachusetts. They plan to broaden the study to more locations to see if their overall conclusions apply more widely.

In one somewhat counterintuitive finding, they say that as the cost of wind and solar power systems comes down, the cost of storage systems will need to come down as well or they will no longer be profitable. That's because at some point it would be more profitable to simply add more generating capacity rather than more storage capacity. The researchers note that there is a window of opportunity now for storage to be adopted in the marketplace. But they warn that the incentives will diminish over time if no action is taken now, and if wind and solar costs fall further.

Trancik says this research falls in an area she refers to as "directed innovation," in which decisions about what areas of research, technology designs, and policies are most needed in order to achieve specific societal goals can be based on clearly quantifiable criteria. "The idea is to use data and models to accelerate energy technology development," she says.
###
This work was supported by the MIT Portugal Program, Lockheed Martin, and the SUTD-MIT International Design Center.

By David L. Chandler, MIT News Office

Storage technologies for renewable energy can pay off

Storage technologies for renewable energy can pay off. Utility companies...

Antarctica lakes are a repository for ancient black carbon Signature of dissolved black carbon also indicates more recent contributions from fossil fuel burning

Remote lakes in a perpetually ice-free area of Antarctica show not only the chemical signature of ancient wildfires, but also some much more recent evidence of fossil-fuel combustion, according to National Science Foundation (NSF)-funded research published this week in the journal Geophysical Research Letters.

The research is based on examination of the levels of dissolved black carbon (DBC) that persist in freshwater and saline lakes in the McMurdo Dry Valleys, a mountainous polar desert across McMurdo Sound from the NSF's logistics hub in Antarctica, McMurdo Station. NSF manages the US. Antarctic Program.Antarctica lakes are a repository for ancient black carbon

In addition to being almost completely scoured of ice and snow by high winds, the Dry Valleys are the site of ice-covered lakes, which experience seasonal, temperature-related advances and retreats in their amount of ice cover during the Southern Hemisphere's summer months, sometimes resulting in a temporary "moat" around the icy surface of the lakes.

They also have some unusual characteristics that make them scientifically interesting repositories for materials like DBC, which are carried into the lakes by local streams or through atmospheric circulation.

Michael Gooseff, the lead principal investigator for the McMurdo Dry Valleys Long-Term Ecological Research (LTER) Project, noted, for example, that in the very recent geological past -- several thousand years ago -- the lakes were at much higher levels and filled the Valleys. The lakes that remain are thought to be remnants of those larger bodies of water and to have collected materials like DBC over a very long time.

He added that the lakes in the Dry Valleys are, like most other lakes, storehouses of materials that find their way into them. But they also have an unusual characteristic important to DBC research; they are closed basins with no outlets.

In short, Gooseff said, "What goes into the lake, stays."

Alia L. Khan, with the Department of Civil and Environmental Engineering at Institute of Arctic and Alpine Studies at the University of Colorado Boulder is lead author on the paper. She is the recipient of an NSF Graduate Research Fellowship

She and other researchers with the Dry Valleys LTER, argue in the paper that brines in the lake bottoms retain DBC whose "woody signature" indicates the source is likely to have been burning -- such as wildfires and other natural events -- at lower latitudes as many as 2,500 years ago or more.

Black carbon from those fires -- more commonly known as soot -- would have been transported by atmospheric winds and deposited in Antarctic glaciers and later entered in lakes through freshwater run-off from nearby glaciers.

The research also indicates DBC levels from fossil fuel traces have increased in the past 25 years, but these concentrations are small in comparison to those associated with wildfires from more than 1,000 years ago. The researchers argue that these more modern traces could have two possible sources.

The first is that helicopters frequently fly in and out of the Dry Valleys to transport researchers and scientific cargo into the field. Most of this flying occurs at the peak of the Antarctic summer when the lake surfaces in the valleys experience a seasonal melt.

The researchers hypothesize, therefore, that emissions from the flights could settle into the moats and become DBC.

They also add that some of the carbon could come from long-range transport of carbon produced by burning of fossil fuels in other areas of the globe.

In either event, they note, their measurements may serve as baselines for tracking environmental quality in the Dry Valleys. "This fossil fuel signature could serve as an indicator of anthropogenic influences in Antarctic environments, which may continue to expand in the future."

--

<a href="http://www.nsf.gov" target="_blank" rel="noopener noreferrer">National Science Foundation</a>

Antarctica lakes are a repository for ancient black carbon

Antarctica lakes are a repository for ancient black carbon Signature...

The future of wildfire activity in the South. A new study by U.S. Forest Service scientists and collaborators projects a four percent increase overall in acres burned by wildfire in the Southeast by 2060, but with substantial uncertainties and large variations by state and ecoregion, including a 34 percent increase in acres burned due to lightning-caused fires. The study, just published in the International Journal of Wildland Fire, is one of the first to account for land use and other societal changes in making projections of future acres burned by wildfires.

"Wildfire activity in the South is determined by two major factors - climate and society, both of which are changing," said Jeff Prestemon, Forest Service researcher who led the study in collaboration with other scientists from the Forest Service and the University of North Carolina at Chapel Hill. "In making wildfire projections, it's important to account for the role of humans, since they ignite the majority of wildfires and suppress nearly all of them. Land use change - more development and infrastructure - also limits the spread of wildfires by breaking up the fuels that fires need and allowing for faster firefighting responses."

The researchers set out to quantify how wildfire area burned could be altered in the 13 southeastern U.S. states from 2011 to 2060, incorporating climate change models as well as projections of land use, population, and personal income. Their study developed nine alternative views of climate and society that, taken together, provide a more complete picture of the possible futures of wildfire in the region than those previously available.

"The study extends earlier efforts in several ways," said Prestemon. "This is the first study we're aware of that projects future area burned in the southeastern U.S. Our estimates quantify the effects of changing climate and also changes in forests and society. In addition, we address issues of incomplete historical wildfire data that are common in wildfire activity databases in a way that has not been previously applied in wildfire projections."

Scenarios used for the study generally projected rising population numbers and densities, rising incomes, and falling forest area for the region - all of which would tend to lead to less wildfire in the region. At the same time, warming temperatures and erratic precipitation patterns forecast under climate change scenarios tend to favor more wildfire, especially that caused by lightning.

Specifically, the results project that in the Southeast, by 2056-2060, as compared to 2016-2020:
<ul>
 	<li>Median annual area burned by lightning-ignited wildfire increases by 34 percent;</li>
 	<li>Human-ignited wildfire decreases by 6 percent; and</li>
 	<li>Total wildfire increases by 4 percent.</li>
</ul>
"Our projections indicate that overall the Southeast would not experience a large increase in annual area burned," said Prestemon. "But considerable uncertainty remains in how wildfire, climate, and society will actually evolve and interact over the coming decades, and our results show ample scope for either increases or decreases. Wildland fire managers and policymakers would do well to plan for either eventuality when considering future costs and concerns such as air quality. Our simulations provide context for the range of possibilities they should consider."
###
Access the full text of the article at <a href="http://www.srs.fs.fed.us/pubs/51075" target="_blank" rel="noopener noreferrer">http://www.srs.fs.fed.us/pubs/51075</a>.

For more information, email Jeff Prestemon at <a href="mailto:jprestemon@fs.fed.us">jprestemon@fs.fed.us</a>

Headquartered in Asheville, NC, the Southern Research Station comprises more than 120 scientists and several hundred support staff who conduct natural resource research in 20 locations across 13 southern states (Virginia to Texas). The Station's mission is "...to create the science and technology needed to sustain and enhance southern forest ecosystems and the benefits they provide." Learn more about the Southern Research Station at: <a href="http://www.srs.fs.usda.gov/" target="_blank" rel="noopener noreferrer">http://www.srs.fs.usda.gov/</a>.

The future of wildfire activity in the South

The future of wildfire activity in the South. A new...

Scientists: Future summers will continue to get hotter than ever. In 50 years, summers across most of the globe could be hotter than any summer experienced by people to date, according to a study by scientists at the National Center for Atmospheric Research (NCAR) in Boulder, Colo.

If climate change continues on its current trajectory, the probability that summers between 2061 and 2080 will be warmer than the hottest on record stands at 80 percent across the world's land areas, excluding <a href="https://www.bing.com/search?q=antarctica&amp;cvid=6777561a14b9406190259b2075e6a0e8&amp;FORM=ANAB01&amp;PC=HCTS">Antarctica</a>, which was not studied. Scientists: Future summers will continue to get hotter than ever

If greenhouse gas emissions are reduced, however, that probability drops to 41 percent.

"Extremely hot summers always pose a challenge to society," said NCAR scientist Flavio Lehner, lead author of the study. "They can increase the risk for health issues, and can also damage crops and deepen droughts. Such summers are a true test of our adaptability to rising temperatures."

The study is part of an upcoming special issue of the journalClimatic Change that will focus on quantifying the benefits of reducing greenhouse gas emissions. The research was funded by the U.S. National Science Foundation (NSF) and the Swiss National Science Foundation.

Simulating a range of summers

The research team, which includes NCAR scientists Clara Deser and Benjamin Sanderson, used two existing sets of model simulations to investigate what future summers might look like.

They created both by running the NCAR-based Community Earth System Model 15 times, with one simulation assuming that greenhouse gas emissions remain unabated and the other assuming that society reduces emissions.

NSF and the U.S. Department of Energy fund the Community Earth System Model. The team ran the simulations on the NCAR-Wyoming Supercomputing Center's Yellowstone system.

"We've thought of climate change as 'global warming,' but it's important to understand how this overall warming affects conditions that hit people locally," said Eric DeWeaver, program director in NSF's Division of Atmospheric and Geospace Sciences, which funds NCAR.

"Extreme temperatures pose risks to people around the globe," DeWeaver said. "These scientists show the power of ensembles of simulations for understanding how these risks depend on the level of greenhouse gas emissions."

By using simulations created by running the same model multiple times, with only tiny differences in the initial starting conditions, the scientists could examine the range of expected summertime temperatures for future "business-as-usual" and reduced-emissions scenarios.

"This is the first time the risk of record summer heat and its dependence on the rate of greenhouse gas emissions have been so comprehensively evaluated from a large set of simulations with a single state-of-the-art climate model," Deser said.

The scientists compared results to summertime temperatures recorded between 1920 and 2014 and to 15 sets of simulated summertime temperatures for the same period.

By simulating past summers -- instead of relying solely on observations -- the researchers established a large range of temperatures that could have occurred naturally under the same conditions, including greenhouse gas concentrations and volcanic eruptions.

"Instead of just comparing the future to 95 summers from the past, the models give us the opportunity to create more than 1,400 possible past summers," Lehner said. "The result is a more comprehensive look at what should be considered natural variability and what can be attributed to climate change."

Emissions cuts could yield big benefits

The results show that between 2061 and 2080, summers in large parts of North and South America, central Europe, Asia, and Africa have a greater than 90 percent chance of being warmer than any summer in the historic record if emissions continue unabated.

That means virtually every summer would be as warm as the hottest to date.

In some regions, the likelihood of summers being warmer than any in the historical record remained less than 50 percent, but in those places -- including Alaska, the central U.S., Scandinavia, Siberia and continental Australia -- summer temperatures naturally vary greatly, making it more difficult to detect effects of climate change.

Reducing emissions would lower the global probability of future summers that are hotter than any in the past, but would not result in uniformly spread benefits. In some regions, including the U.S. East Coast and large parts of the tropics, the probability would remain above 90 percent, even if emissions were reduced.

But reduced emissions would result in a sizable boon for other regions of the world.

Parts of Brazil, central Europe, and eastern China would see a reduction of more than 50 percent in the chance that future summers would be hotter than the historic range. Since these areas are densely inhabited, a large part of the global population would benefit significantly from climate change mitigation.

"It's often overlooked that the majority of the world's population lives in regions that will see a comparably fast rise in temperatures," Lehner said.

Scientists: Future summers will continue to get hotter than ever

Scientists: Future summers will continue to get hotter than ever....

2016 sets carbon dioxide record thanks to El Nino. The human-caused rise in atmospheric concentration of carbon dioxide is being given an extra boost this year by the natural climate phenomena of El Niño, say climate scientists in a paper published in today's edition of the journal Nature <a href="http://www.earth.com/news/water-vapor-buoyancy-mitigates-climate-warming-in-the-tropics/">Climate</a> Change. As a result, 2016 will be the first year with concentrations above 400 parts per million all year round in the iconic Mauna Loa carbon dioxide record.

Lead author Professor Richard Betts, of the Met Office Hadley Centre and <a href="http://www.exeter.ac.uk" target="_blank" rel="noopener noreferrer">University of Exeter</a>, said: "The atmospheric carbon dioxide concentration is rising year-on-year due to human emissions, but this year it is getting an extra boost due to the recent El Niño event - changes in the sea-surface temperature of the tropical Pacific Ocean. This warms and dries tropical ecosystems, reducing their uptake of carbon, and exacerbating forest fires. Since human emissions are now 25 per cent greater than in the last big El Niño in 1997/98, this all adds up to a record CO2 rise this year."

The rising trend in CO2 was seen by Charles David Keeling when he began recording CO2 at Mauna Loa, Hawaii, in 1958. His early measurements were around 315 parts per million of carbon dioxide, 60 years later this has been rising at an average rate of 2.1 parts per million, but using a seasonal climate forecast model and statistical relationship with sea temperatures, Professor Betts and colleagues forecast the rise this year to be a record 3.15 + - 0.53 parts per million. The average concentration in 2016 is forecast to be 404.45 +-0.53 parts per million, dropping to 401.48 +- 0.53 in September before resuming their ongoing rise next year. The scientists already successfully predicted this year's maximum concentration of 407 parts per million last month.

<a href="https://www.bing.com/search?q=carbon+dioxide&amp;form=EDGEAR&amp;qs=PF&amp;cvid=7ad0f174d1f54788aefc7e07d6423895&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOMAjS%21RFp6jzZWJ7AkCsIYK2MnxaEi9aA7IxI7Q3IKQ4UuyPEbAwp%21yDnd03m0LkAWHBHn6XLQI84WwiMKIW*AU&amp;plvar=0&amp;PC=HCTS">Carbon dioxide</a> concentrations also show modest ups-and-downs with the seasons. Plants draw down CO2 in the summer and release it again in the autumn and winter. Professor Betts said: "Carbon dioxide at Mauna Loa is currently above 400 parts per million, but would have been expected to drop back down below this level in September. However, we predict that this will not happen now, because the recent El Niño has warmed and dried tropical ecosystems and driven forest fires, adding to the CO2 rise".

Since natural processes only remove carbon dioxide from the atmosphere gradually, levels will remain high even if human emissions began to decline. Scientists expect the concentrations to now remain above 400 parts per million for at least a human lifetime.

Prof Ralph Keeling of the Scripps Institution of Oceanography, who is a co-author on the paper, said: "Back in September last year, we suspected that we were measuring CO2 concentrations below 400 parts per million for the last time. Now it is looking like this was indeed the case." The ongoing CO2 measurements at Mauna Loa used in this study are made by the Scripps Institution of Oceanography, and an independent set of measurements are made by the US National Oceanographic and Atmospheric Administration, which runs the Mauna Loa Observatory.

Chris Jones, also of the Met Office Hadley Centre and another co-author, said: "Studying how these natural cycles interact with human influences is an important part of climate science. Making and testing predictions like this helps us build our understanding and further develop climate models."

2016 sets carbon dioxide record thanks to El Nino

2016 sets carbon dioxide record thanks to El Nino. The...

Carbon dioxide emissions from dry and oxygen-rich environments are likely to play a much greater role in controlling future rates of climate change caused by permafrost thaw than rates of methane release from oxygen-poor wetlands in the Arctic, according to research by a scientist at the <a href="http://www.exeter.ac.uk" target="_blank" rel="noopener noreferrer">University of Exeter</a>.

Dr Iain Hartley, an associate professor in the department of Geography, and his co-authors found that both temperature and soil conditions affected the quantity of carbon released from thawing permafrost. A 10 °C increase in soil temperature released twice as much carbon into the atmosphere, but even more importantly, drier, oxygen-rich soil conditions resulted in more than three times more carbon release than wetter, low oxygen soil conditions.

The study published in Nature Climate Change and led by Northern Arizona University assistant research professor, Christina Schädel, analysed 25 Arctic soil incubation studies and discovered that the majority of that carbon emitted was in the form of carbon dioxide even in the low oxygen conditions, with only five per cent of the total anaerobic products being methane.

This means that even though methane packs 34 times the climate warming punch of carbon dioxide, methane fluxes were not high enough to compensate for the smaller total quantity of carbon released under low oxygen conditions in wet soils.

Dr Hartley said: "In different boreal and arctic ecosystems, permafrost thaw can expose previously-frozen organic matter to very different soil conditions. The results of our study indicate that where the soils remain dry there is much greater potential for large amounts of carbon to be released to the atmosphere and for there to a positive feedback to climate change."

Scientists in the international Permafrost Carbon Network that Schädel co-leads with <a href="https://www.bing.com/search?q=northern+arizona&amp;form=EDGEAR&amp;qs=LS&amp;cvid=02bedc8147934b25ba2cf822091a6063&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOOncircQbKhy8wgeiACO*7%21Zq521%21bwM58aLSRNDLivQcRC5I8O9dRtU9N%21A6vHNYA2jvzEtPclHV%21yI*5HjY0Q&amp;plvar=0&amp;PC=HCTS">Northern Arizona</a> University professor of ecosystem ecology, Ted Schuur, provided much of the data.

Dr Schädel said: "Our results show that increasing temperatures have a large effect on carbon release from permafrost but that changes in soil moisture conditions have an even greater effect," says Schädel. "We conclude that the permafrost<a href="http://www.earth.com/news/forest-service-releases-state-by-state-details-on-carbon-emissions/"> carbon</a> feedback will be stronger when a larger percentage of the permafrost zone undergoes thaw in a dry and oxygen-rich environment."

As the permafrost thaws, microbes wake up and begin digesting the newly available remains of ancient plants and animals stored as carbon in the soil. This digestion produces either carbon dioxide or methane, depending on soil conditions. Scientists want to understand the ratio of carbon dioxide to methane gas released by this process because it affects the strength of the permafrost carbon feedback loop: greenhouse gases released due to thawing permafrost cause temperatures to rise, leading to even more thawing and carbon release. Furthermore, the Arctic permafrost is like a vast underground storage tank of carbon, holding almost twice as much as the atmosphere. At that scale, small changes in how the carbon is released will have big effects.

The current study zeroed in on two factors: soil temperature and the availability of oxygen. Soils in the lab were incubated at a range of warmer temperatures projected for the future. The availability of oxygen is important because it determines how microbes digest carbon. Oxygen-rich, or aerobic, conditions are found in dry soils and produce carbon dioxide. Oxygen-poor, or anaerobic, conditions are found in wet soils and produce both carbon dioxide and methane. Lab incubations mimicked these two conditions.

The question of whether wet or dry soils will dominate the future Arctic permafrost zone remains. This study highlights the need to monitor changes in wetness associated with permafrost thaw, changes that will ultimately determine how much carbon will be released from across the Arctic landscape.

Carbon dioxide emissions biggest player in permafrost thaw

Carbon dioxide emissions from dry and oxygen-rich environments are likely...

Wood mulch can help in climate change fight. In addition to looking nice, covering soil with wood mulch can actually help reduce greenhouse gas emissions, UBC research shows.

In a recent study undertaken in <a href="https://www.bing.com/search?q=kelowna&amp;form=EDGEAR&amp;qs=PF&amp;cvid=ece0444d0c1b40a8a542a3af8da874a4&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOOncircQbKhy8wgeiACO*7%21vkfITAMUrJrwvmHmp56N63c5RnU1LjgRKa0HJruF36eJnts9WRezWxRuBPVQgAqT&amp;plvar=0&amp;PC=HCTS">Kelowna</a>-area apple orchards and vineyards, UBC researchers discovered that using mulch in agriculture can cut nitrous oxide emissions up to 28 per cent.

"In addition to saving water, improving soil, combatting pests and stopping weeds, wood mulch actually reduces the release of a greenhouse gas 300 times more potent than carbon dioxide," says Craig Nichol, senior instructor of Earth and Environmental Sciences at UBC's Okanagan campus. "Provided you are not driving great distances to obtain the mulch, it would appear that mulch could be a powerful tool in helping to reduce greenhouse gas emissions, particularly if used in these agricultural systems."Wood mulch can help in climate change fight

Nichol's research was part of a two-year study in which small emissions-recording chambers were placed on top of bare soil as well as soil covered by mulch.

In addition to reduced levels of nitrous oxide emissions, mulched areas also showed a 74 per cent reduction in soil nitrates. The nitrates are the source material for nitrous oxide emissions and can also leach into groundwater.

According to Agriculture and Agri-Food Canada, nitrous oxide emitted from soil accounts for one half of agriculture emissions that contribute to global warming. Emission levels are often higher in agricultural soil due to the use fertilizers and manure.

Nichol's research was part of a larger study with fellow UBC researchers Melanie Jones and Louise Nelson. The study was recently published in the journal Agricultural Water Management.

Wood mulch can help in climate change fight

Wood mulch can help in climate change fight. In addition...

Global ethane emissions, an air pollutant and greenhouse gas, are on the uptick again, according to a new study led by the University of Colorado Boulder.

The team found that a steady decline of global ethane emissions following a peak in about 1970 ended between 2005 and 2010 in most of the Northern Hemisphere and has since reversed, said CU-Boulder Associate Research Professor Detlev Helmig, lead study author. Between 2009 and 2014, ethane emissions in the Northern Hemisphere increased by about 400,000 tons annually, the bulk of it from North American oil and gas activity, he said.Global ethane emissions, an air <a href="http://www.earth.com/news/honey-trace-environmental-pollutants/">pollutant</a> and greenhouse gas, are on the uptick again

The decline of Global <a href="https://www.bing.com/search?q=ethane&amp;form=EDGEAR&amp;qs=PF&amp;cvid=0a87032420a444e8b8101e95b2004215&amp;cc=US&amp;setlang=en-US&amp;elv=AXK1c4IvZoNqPoPnS%21QRLOMAjS%21RFp6jzZWJ7AkCsIYKV8oVjmOoIS6LTmfAh9BQ%21Ev7i7tohVox8H*rfkk%217drjoztKh*10dwyAKYu11io5&amp;plvar=0&amp;PC=HCTS">ethane</a> emissions, an air pollutant and greenhouse gas, are on the uptick againethane and other non-methane hydrocarbons (NMHC) starting around 1970 is believed to be primarily due to better emission controls, said Helmig. The controls resulted in reduced emissions from oil and gas production, storage and distribution, as well as combustion exhaust from cars and trucks.

"About 60 percent of the drop we saw in ethane levels over the past 40 years has already been made up in the past five years," said Helmig. "If this rate continues, we are on track to return to the maximum ethane levels we saw in the 1970s in only about three more years. We rarely see changes in atmospheric gases that quickly or dramatically."

Ethane, propane and a host of other NMHCs are released naturally by the seepage of fossil carbon deposits, volcanic activity and wildfires, said Helmig. But human activities, which also include biomass burning and industrial use, constitute the most dominant source of the NMHCs worldwide.

"These human sources make up roughly three-quarters of the atmospheric ethane that is being emitted," said Helmig.

The air samples for the study were collected from more than 40 sites around the world, from Colorado and Greenland to Germany, Switzerland, New Zealand and the Earth's polar regions. More than 30,000 soda bottle-sized air containers were sampled at the National Oceanic and Atmospheric Administration's (NOAA) Earth Systems Research Laboratory (ESRL) in Boulder over the past decade.

The study also showed that among the air sampling locations around the world, the largest increases in ethane and shorter-lived propane were seen over the central and eastern United States, areas of heavy oil and gas activity, said Helmig.

"We concluded that added emissions from U.S. oil and gas drilling have been the primary source for the atmospheric ethane trend reversal," he said.

The study, published in Nature Geoscience, also indicated that emissions of total NMHC in the Northern Hemisphere are now increasing by roughly 1.2 million tons annually.

The findings from the flask network, which INSTAAR and NOAA have been operating for more than 10 years, were supported by additional measurements showing very similar ethane behavior from a number of continuous global monitoring sites, he said.

A component of natural gas, ethane plays an important role in Earth's atmosphere. As it breaks down near Earth's surface it can create ground-based ozone pollution, a health and environmental risk.

Chemical models by the team show that the increase in ethane and other associated hydrocarbons will likely cause additional ground-based ozone production, particularly in the summer months, he said.

"Ethane is the second most significant hydrocarbon emitted from oil and gas after methane," said Helmig. "Other studies show on average there is about 10 times as much methane being emitted by the oil and gas industry as ethane."

There is high interest by scientists in methane since it is a strong greenhouse gas, said Helmig. The new findings on ethane increases indicate there should be more research on associated methane emissions.
###
Other CU-Boulder co-authors on the study included INSTAAR graduate student Samuel Rossabi and researcher Jacques Hueber. The paper also included scientists from NOAA, the National Center for Atmospheric Research in Boulder and institutes in Germany, England, Switzerland, Belgium and New Zealand.

Global ethane emissions are rising again

Global ethane emissions, an air pollutant and greenhouse gas, are...

Huge ancient river basin explains location of Jakobshavn Isbræ glacier. An ancient basin hidden beneath the Greenland ice sheet, discovered by researchers at the University of Bristol, may help explain the location, size and velocity of Jakobshavn Isbræ, Greenland's fastest flowing outlet glacier.

The research also provides an insight into what past river drainage looked like in Greenland, and what it could look like in the future as the ice sheet retreats.

Michael Cooper and colleagues from Bristol's School of Geographical Sciences and Cabot Institute, and Imperial College London, studied the bedrock in Greenland using data collected mainly by<a href="https://en.wikipedia.org/wiki/NASA"> NASA</a> (through Operation Ice Bridge), as well as various researchers from the UK and Germany, over several decades. This data is collected by aircraft using ice penetrating radar, which bounces back off the bedrock underneath the ice (as ice is mostly transparent to radio waves at certain frequencies).

Mr Cooper said: "The drainage basin we discovered shows signs of being carved by ancient rivers, prior to the extensive glaciation of <a href="http://www.earth.com/news/greenland-and-antarctica-are-losing-318-gigatons-of-ice-each-year/">Greenland</a> (i.e. before the Greenland Ice Sheet existed), rather than being carved by the movement of ice itself. It has been remarkably well preserved - and has not been eroded away by successive glaciations. The channel network has never been seen before by humans - it was last uncovered around 3.8 million years ago."Huge ancient river basin explains location of Jakobshavn Isbræ glacier

The size of the drainage basin the team discovered is very large, at around 450,000 km2, and accounts for about 20 per cent of the total land area of Greenland (including islands).

This is comparable to the size of the Ohio River drainage basin, which is the largest tributary of the Mississippi. The channels the team mapped could more appropriately be called 'canyons,' with relative depths of around 1,400 metres in places, and nearly 12km wide, all hidden underneath the ice.

As well as being an interesting discovery of great size, the channel network and basin was instrumental in influencing the flow of ice from the deep interior to the margin, both now and over several glacial cycles, as well as influencing the location and speed of the Jakobshavn ice stream.

###

Paper: 'Palaeofluvial landscape inheritance for Jakobshavn Isbrae catchment, Greenland' by M. A. Cooper, K. Michaelides, M. J. Siegert and J. L. Bamber in Geophysical Research Letters

Huge ancient river basin explains location of Jakobshavn Isbræ glacier

Huge ancient river basin explains location of Jakobshavn Isbræ glacier....

<div class="img-wrapper"></div>
Geohazard: Giant sinkholes near oil patches. Residents of Wink and neighboring Kermit have grown accustomed to the two giant sinkholes that sit between their small West Texas towns.

But now radar images taken of the sinkholes by an orbiting space satellite reveal big changes may be on the horizon.

A new study by geophysicists at Southern Methodist University, <a href="http://www.earth.com/news/keto-diet-anti-cancer/">Dallas</a>, finds the massive sinkholes are unstable, with the ground around them subsiding, suggesting the holes could pose a bigger <a href="https://en.wikipedia.org/wiki/Hazard">hazard</a> sometime in the future. Geohazard: Giant sinkholes near oil patches

The two sinkholes -- about a mile apart -- appear to be expanding. Additionally, areas around the existing sinkholes are unstable, with large areas of subsidence detected via satellite radar remote sensing. That leaves the possibility that new sinkholes, or one giant sinkhole, may form, said geophysicists and study co-authors Zhong Lu, professor, Shuler-Foscue Chair, and Jin-Woo Kim, a research scientist, in the Roy M. Huffington Department of Earth Sciences at SMU.

"This area is heavily populated with oil and gas production equipment and installations, hazardous liquid pipelines, as well as two communities. The intrusion of freshwater to underground can dissolve the interbedded salt layers and accelerate the sinkhole collapse," said Kim, who leads the SMU geophysical team reporting the findings. "A collapse could be catastrophic. Following our study, we are collecting more high-resolution satellite data over the sinkholes and neighboring regions to monitor further development and collapse."

Lu and Kim reported the findings in the scientific journal Remote Sensing, in the article "Ongoing deformation of sinkholes in Wink, Texas, observed by time-series Sentinel-1A SAR Interferometry."

The research was supported by the U.S. Geological Survey Land Remote Sensing Program, the NASA Earth Surface &amp; Interior Program, and the Shuler-Foscue Endowment at Southern Methodist University.

Unstable ground linked to rising, falling groundwater

The sinkholes were originally caused by the area's prolific oil and gas extraction, which peaked from 1926 to 1964. Wink Sink No. 1, near the Hendricks oil well 10-A, opened in 1980. Wink Sink No. 2, near Gulf WS-8 supply well, opened 22 years later in 2002.

It appears the area's unstable ground now is linked to changing groundwater levels and dissolving minerals, say the scientists. A deep-seated salt bed underlies the area, part of the massive oil-rich Permian Basin of West Texas and southeastern New Mexico.

With the new data, the SMU geophysicists found a high correlation between groundwater level in the underlying Ogallala Aquifer and further sinking of the surface area during the summer months, influenced by successive roof failures in underlying cavities.

Satellite images and groundwater records indicate that when groundwater levels rise, the ground lifts. But the presence of that same groundwater then speeds the dissolving of the underground salt, which then causes the ground surface to subside.

Everything's bigger in Texas, and the Wink sinkholes are no exception

Officials have fenced off the two sinkholes near Wink, a town of about 940 people, and Kermit, a town of about 6,000 people. The giant holes are notable features on the area's vast plains, which are dotted mostly with oil pump jacks, storage facilities, occasional brush and mesquite trees.

Based on modeling of satellite image datasets, SMU's researchers report that Wink Sink No. 1, which is closer to the town of Kermit, appears to be the most unstable. The smaller hole of the two, it has grown to 361 feet (110 meters) across -- the length of a football field.

"Even though Wink No. 1 collapsed in 1980, its neighboring areas are still subsiding," say the authors, "and the sinkhole continues to expand." An oval-shaped deformation circling the sinkhole measures three-tenths of a mile (500 meters) wide and is subsiding up to 1.6 inches (4 centimeters) a year.

Wink Sink No. 2, which is nine-tenths of a mile south of No. 1 and which sits closer to the town of Wink, is the larger of the sinkholes. It varies from 670 feet to 900 feet across.

Wink No. 2 is not experiencing as much subsidence as Wink No. 1. However, its eastern side is collapsing and eroding westward at a rate of up to 1.2 inches (3 centimeters) a year.

"Wink No. 2 exhibits depression associated with the ongoing expansion of the underground cavity," the authors report.

Some ground that doesn't even border the edges of the two sinkholes is also subsiding, the scientists observed. An area more than half a mile (1 kilometer) northeast of No. 2 sank at a rate of 1.6 inches (4 centimeters) in just four months.

Ground northeast of sinkholes is subsiding, suggesting new ones forming

The largest rate of ground subsidence is not at either sinkhole, but at an area about seven-tenths of a mile (1.2 kilometers) northeast of No. 2. Ground there is subsiding at a rate of more than 5 inches (13 centimeters) a year.

It's aerial extent, the researchers report, has also enlarged over the past eight years when a previous survey was done.

"The enlarged deformation could be an alarming precursor to the potential future development of hazards in the vicinity," said the authors.

Additionally, ground along a road traveled by oil field vehicles, about a quarter mile (400 meters) directly north of No. 2, is subsiding about 1.2 inches (3 centimeters) a year.

Ground's movement detected with radar technique

The satellite radar datasets were collected over five months between April 2015 and August 2015. With them, the geophysicists observed both two-dimension east-west deformation of the sinkholes, as well as vertical deformation.

The SMU scientists used a technique called interferometric synthetic aperture radar, or InSAR for short, to detect changes that aren't visible to the naked eye.

"From 435 miles above the Earth's surface, this InSAR technique allows us to measure inch-level subsidence on the ground. This is a monumental human achievement, and scientists will not stop endeavoring to improve this technique for more precise measurements," said Lu, who is world-renowned for leading scientists in InSAR applications. Lu is a member of the Science Definition Team for the dedicated U.S. and Indian NASA-ISRO InSAR mission, set for launch in 2020 to study hazards and global environmental change.

InSAR accesses a series of images captured by a read-out radar instrument mounted on the orbiting satellite Sentinel-1A. Sentinel-1A was launched in April 2014 as part of the European Union's Copernicus program.

Simply put, Sentinel-1A bounces a radar signal off the earth, then records the signal as it bounces back, delivering measurements. The measurements allow geophysicists to determine the distance from the satellite to the ground, revealing how features on the Earth's surface change over time.

"Sinkhole formation has previously been unpredictable, but satellite remote sensing provides a great means to detect the expansion of the current sinkholes and possible development of new sinkholes," said Kim. "Monitoring the sinkholes and modeling the rate of change can help predict potential sinkhole development."

Sentinel-1A data were obtained from Sentinels Scientific Data Hub - Copernicus. Groundwater well data came from the Texas Water Development Board.

Geohazard: Giant sinkholes near oil patches

Geohazard: Giant sinkholes near oil patches. Residents of Wink and...

Scientists: Ban Arctic offshore drilling. Nearly 400 scientists have signed a letter urging President Obama to eliminate the possibility of Arctic offshore drilling in the near future by taking the Arctic Ocean out of the next federal offshore lease sale plan.

The scientists include Jane Lubchenco, Obama's former administrator of the National Oceanographic and Atmospheric Administration, now a researcher and teacher at <a href="http://www.earth.com/news/unequal-treatment-protestors/">Oregon</a> State University.

"I've witnessed some of the unprecedented changes underway in the Arctic" Lubchenco said in a prepared statement. "Conserving important marine areas is an essential step in sustaining the region's resilience." Scientists: Ban Arctic offshore drilling

The 388 signees include scientists from 13 countries and 25 current or emeritus professors at the University of Alaska. Their opinion runs counter to Alaska elected officials, who strongly support opening Alaska waters to drilling as a new source of oil for the trans-Alaska pipeline.

The Interior Department is collecting public comment through Thursday on the proposed 5-year oil and gas leasing program, which would cover 2017 to 2022.

Environmental groups strongly oppose Arctic drilling. They say industrial activity will harm marine mammals already hurt by a loss of sea ice and that global warming will be accelerated by burning oil found in the Arctic Ocean.

Two sales in Arctic waters are in the plan: the Beaufort Sea, off Alaska's north shore, in 2020, and the Chukchi Sea, off the northwest coast, in 2022.

The letter was released by Pew Charitable Trusts. Pew's Arctic science director, Henry Huntington, said the Obama administration has been clear that it wants decisions to be science-based. The letter is a chance for scientists to weigh in on decisions in the Arctic, a region that's rapidly changing.

"It's hard to know what's coming next, so caution is a good idea," he said.

The White House and the Interior Department, said Gov. Bill Walker in an email message Tuesday, will be subjected to incredible pressure to make the lease sales so restrictive that it makes little sense for companies or the state to participate.

"We can protect the ocean and develop," Walker said. "The whaling captains we have talked with tell us it is important to move forward with development. Their communities depend on it. They also believe they can balance development with their subsistence way of life."

Interior Secretary Sally Jewell in October canceled Beaufort and Chukchi lease sales in the current five-year plan She cited market conditions and low industry interest.

Her decision followed a Sept. 28 announcement by Royal Dutch Shell PLC, the only company in the last decade to drill in federal waters, that it would cease exploration in the Chukchi and Beaufort seas after spending upward of $7 billion. The company cited disappointing results from a well drilled in the Chukchi and the unpredictable federal regulatory environment.

Alaska's all-Republican congressional delegation, Rep. Don Young and Sens. Lisa Murkowski and Dan Sullivan, last month urged Jewell to retain future Arctic lease sales.

The Chukchi and the Beaufort hold an estimated 23.6 billion barrels of conventionally recoverable oil - enough to meet all of California's demands for oil for 37.5 years, they said.

Drilling was proven safe though dozens of wells in the 1980s and '90s, they wrote.

"We must warn against any attempt to use past lease sale cancellations and the chaotic regulatory regime that Interior has imposed as evidence of a 'lack of industry interest' in offshore Alaska," they said.

© 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.

Scientists: Ban Arctic offshore drilling

Scientists: Ban Arctic offshore drilling. Nearly 400 scientists have signed...

France ratifies Paris Agreement on climate change. France's President Francois Hollande has ratified the Paris Agreement, a deal on curbing global warming reached last year by 195 countries.
France on Wednesday became the second European country to ratify, after Hungary, and the first the Group of Seven advanced economies. The ratification was formally authorized by the<a href="https://www.bing.com/search?q=swedish&amp;form=EDGEAR&amp;qs=PF&amp;cvid=f31dac1bec5e471f94a2d890e68ba5f2&amp;cc=US&amp;setlang=en-US&amp;elv=AY3%21uAY7tbNNZGZ2yiGNjfOabOUBoozd5xZV3aGO2sgHE6iItIHR1S9o8hmxaL4qnFdskP6ThXWHohyvVGpgJGiFGaXRxmlEbM45kaYukkeO&amp;plvar=0&amp;PC=HCTS"> French</a> parliament last week. France ratifies Paris Agreement on climate change
The Paris agreement aims to keep the global temperature rise below 2 degrees Celsius (3.6 degrees Fahrenheit) compared with preindustrial times. It enters into force once 55 countries representing at least 55 percent of <a href="http://www.earth.com/news/increasing-air-pollution-affects-half-of-the-global-population/">global</a> emissions have joined it.
China, the world's top carbon emitter, said it intends to ratify the agreement before the G-20 summit in China in September. The United States, the second-largest emitter, also announced its intention to ratify this year. Therefore the carbon has caused a lot of health issues for the community. Also the climate change has been a huge change for the whole world causing many things to be different. Such as the changing of temps and for the agriculture business.
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about ourPrivacy Policy and Terms of Use.

France ratifies Paris Agreement on climate change

France ratifies Paris Agreement on climate change. France's President Francois...

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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

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

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Today's Video of the Day from <a href="https://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

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

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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



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



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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



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

Melt ponds on the Greenland Ice Sheet

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



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



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



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



Video Credit: ESA



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



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Tracking changes in Earth's water cycle

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

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

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



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



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



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



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



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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Mysterious "spoke season" captured on Saturn

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

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

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



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



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



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



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



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



Video Credit: NTU Singapore



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



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

Plants help remove heavy metals from contaminated soil

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

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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

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

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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

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

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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

[sendtonews key="u0TYxxqfF7-2186404-12187" type="single"] Today’s Video of the Day from NASA’s...