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Flooding might triple in the mountains of Asia due to global warming

Science Daily - Thu, 05/06/2021 - 11:58
A research team has revealed the dramatic increase in flood risk that could occur across Earth's icy Third Pole in response to ongoing climate change. Focusing on the threat from new lakes forming in front of rapidly retreating glaciers, a team demonstrated that the related flood risk to communities and their infrastructure could almost triple. Important new hotspots of risk will emerge, including within politically sensitive transboundary regions of the Himalaya and Pamir.

Antarctica remains the wild card for sea-level rise estimates through 2100

Science Daily - Wed, 05/05/2021 - 16:49
A massive collaborative research project offers projections to the year 2100 of future sea-level rise from all sources of land ice, offering the most complete projections created to date.

Ice core chemistry study expands insight into sea ice variability in Southern Hemisphere

Science Daily - Wed, 05/05/2021 - 16:49
Sea ice cover in the Southern Hemisphere is extremely variable, from summer to winter and from millennium to millennium, according to a new study. Overall, sea ice has been on the rise for about 10,000 years, but with some exceptions to this trend. Researchers uncovered these findings by examining the chemistry of a 54,000-year-old South Pole ice core.

Catastrophic sea-level rise from Antarctic melting possible with severe global warming

Science Daily - Wed, 05/05/2021 - 10:13
The Antarctic ice sheet is much less likely to become unstable and cause dramatic sea-level rise in upcoming centuries if the world follows policies that keep global warming below a key 2015 Paris climate agreement target, according to a new study.

Antarctic ice-sheet melting to lift sea level higher than thought, Harvard study says

Science Daily - Fri, 04/30/2021 - 15:59
The new predictions show that in the case of a total collapse of the ice sheet, global sea level rise estimates would be amplified by an additional meter within 1,000 years.

Cave deposits reveal Pleistocene permafrost thaw, absent predicted levels of CO2 release

Science Daily - Fri, 04/30/2021 - 08:32
Expanding the study of prehistoric permafrost thawing to North America, researchers found evidence in mineral deposits from caves in Canada that permafrost thawing took place as recently as 400,000 years ago, in temperatures not much warmer than today. But they did not find evidence the thawing caused the release of predicted levels of carbon dioxide stored in the frozen terrain.

Icebreaker's cyclone encounter reveals faster sea ice decline

Science Daily - Fri, 04/30/2021 - 08:31
An icebreaker unexpectedly in the path of an Arctic cyclone allowed researchers to unravel why sea ice declines during and after a cyclone. For the first time ever, scientists were able to show that cyclone-triggered processes within the Arctic Ocean melt sea ice from below.

Was North America populated by 'stepping stone' migration across Bering Sea?

Science Daily - Thu, 04/29/2021 - 10:24
A new study may answer 'one of the greatest mysteries of our time . . . when humans made the first bold journey to the Americas.'

Methane release rapidly increases in the wake of the melting ice sheets

Science Daily - Thu, 04/29/2021 - 09:49
Melting of the Arctic ice sheets caused rapid methane release from the ocean floor during the last two deglaciations, according to a new study. A similar release is likely to happen today, and should be included in climate models, say the scientists.

Global glacier retreat has accelerated

Science Daily - Thu, 04/29/2021 - 08:51
Scientists have shown that almost all the world's glaciers are becoming thinner and losing mass - and that these changes are picking up pace. The team's analysis is the most comprehensive and accurate of its kind to date.

Seasonal water resource on the Upper Indus

Science Daily - Wed, 04/28/2021 - 12:29
Seasonally occurring fields of aufeis (icing) constitute an important resource for the water supply of the local population in the Upper Indus Basin. Geographers have now examined the spreading of aufeis and, for the first time, created a full inventory of these more than 3,700 aufeis fields. They are important for these high mountain areas between South and Central Asia, particularly with respect to hydrology and climatology.

Arctic stew: Understanding how high-latitude lakes respond to and affect climate change

Science Daily - Tue, 04/27/2021 - 12:54
To arrive at Nunavut, turn left at the Dakotas and head north. You can't miss it -- the vast tundra territory covers almost a million square miles of northern Canada. Relatively few people call this lake-scattered landscape home, but the region plays a crucial role in understanding global climate change.

Social tensions preceded disruptions in ancient Pueblo societies

Science Daily - Mon, 04/26/2021 - 14:48
Drought is often blamed for the periodic disruptions of ancient Pueblo societies of the U.S. Southwest, but in a study with potential implications for the modern world, archaeologists found evidence that slowly accumulating social tension likely played a substantial role in three dramatic upheavals in Pueblo development. The findings show that Pueblo farmers often persevered through droughts, but when social tensions were increasing, even modest droughts could spell the end of an era of development.

Climate has shifted the axis of the Earth, study finds

Science Daily - Sun, 04/25/2021 - 10:44
Melting glaciers redistributed enough water to cause the direction of polar wander to turn and accelerate eastward during the mid-1990s, according to a new study.

Fiber optic cable monitors microseismicity in Antarctica

Science Daily - Fri, 04/23/2021 - 12:02
Researchers shared how they are using fiber optic cable to detect the small earthquakes that occur in ice in Antarctica.

Mars has right ingredients for present-day microbial life beneath its surface, study finds

Science Daily - Thu, 04/22/2021 - 14:04
New research suggests that rocks in the Martian crust could produce the same kind of chemical energy that supports microbial life deep beneath Earth's surface.

Carbon dioxide-rich liquid water in ancient meteorite

Science Daily - Wed, 04/21/2021 - 14:12
Scientists detect small pockets of carbon dioxide-rich liquid water in a meteorite dating from the early solar system.

Climate 'tipping points' need not be the end of the world

Science Daily - Wed, 04/21/2021 - 11:46
The disastrous consequences of climate 'tipping points' could be averted if global warming was reversed quickly enough, new research suggests.

Solar panels are contagious - but in a good way

Science Daily - Wed, 04/21/2021 - 11:45
The number of solar panels within shortest distance from a house is the most important factor in determining the likelihood of that house having a solar panel, when compared with a host of socio-economic and demographic variables. This is shown in a new study by scientists using satellite and census data of the city of Fresno in the US, and employing machine learning.

Oceanographers reveal links between migrating Gulf Stream and warming ocean waters

Science Daily - Tue, 04/20/2021 - 11:14
The Northwest Atlantic Shelf is one of the fastest-changing regions in the global ocean, and is currently experiencing marine heat waves, altered fisheries and a surge in sea level rise along the North American east coast. A new article reveals the causes, potential predictability and historical context for these types of rapid changes.

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