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Read science articles on the ice age, glaciation and climatology. Discover the connection between ice ages and global warming.
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Reconstructing human history with the help of fecal sterols

Wed, 10/10/2018 - 09:55
The story of human presence on Earth can be told by studying the sediment and soil accumulation of these chemical compounds in human feces.

Polar bears gorged on whales to survive past warm periods; won't suffice as climate warms

Tue, 10/09/2018 - 16:56
A new study found that while dead whales are valuable sources of fat and protein for some polar bears, this resource will likely not be enough to sustain most bear populations in the future when the Arctic becomes ice-free in summers.

Rapid, widespread changes may be coming to Antarctica's Dry Valleys

Tue, 10/09/2018 - 12:58
Antarctica's sandy polar desert, the McMurdo Dry Valleys, has undergone changes over the past decade and the recent discovery of thawing permafrost, thinning glaciers and melting ground ice by a research team are signs that rapid and widespread change could be on the horizon.

Drier, less predictable environment may have spurred human evolution

Mon, 10/08/2018 - 17:33
Evidence of a variable but progressively drying climate coincides with a major shift in stone-tool-making abilities and the appearance of modern Homo sapiens. Sediment cores obtained by the Hominin Sites and Paleolakes Drilling Project provide the first continuous environmental context for the diverse archeological evidence recovered from nearby localities in the East African rift valley.

Rapid response needed to limit global warming

Mon, 10/08/2018 - 06:51
Limiting global warming to 1.5°C would require rapid, far-reaching and unprecedented changes in all aspects of society, according to the latest report from the world's leading body of climate change experts.

Ground shaking during devastating flood offers new insights

Thu, 10/04/2018 - 13:39
Scientists were able to record a sudden outburst of a glacial lake with seismometers deployed the year before in the wake of the catastrophic Ghorka earthquake in April 2015. The authors of a new study argue that such major flood events have a greater impact on erosion rates than the annual monsoon rainfalls. The reason is that the water masses mobilize large boulders and coarse sediment which usually protect the riverbed.

Cooling effect of preindustrial fires on climate underestimated

Wed, 10/03/2018 - 10:04
The Industrial Revolution brought about many things: the steam engine, the factory system, mass production. But not, apparently, more wildfires. Actually, the opposite. A new study finds that emissions from fire activity were significantly greater in the preindustrial era, which began around 1750, than previously thought. As a result, scientists have underestimated the cooling effect the aerosol particles produced by these fires had on the past climate.

2018 Arctic summertime sea ice minimum extent tied for sixth lowest on record

Thu, 09/27/2018 - 11:29
Arctic sea ice likely reached its 2018 lowest extent on Sept. 19 and again on Sept. 23, 2018. Analysis of satellite data showed that, at 1.77 million square miles (4.59 million square kilometers), 2018 effectively tied with 2008 and 2010 for the sixth lowest summertime minimum extent in the satellite record.

Big increase in economic costs if cuts in greenhouse gas emissions are delayed

Wed, 09/26/2018 - 18:20
Stronger efforts to cut greenhouse gas emissions should be undertaken to avoid global warming of more than 1.5 degrees Celsius -- without relying on potentially more expensive or risky technologies to remove carbon dioxide from the atmosphere or reduce the amount of sunlight reaching Earth's surface.

Retracing Antarctica's glacial past

Tue, 09/25/2018 - 13:04
More than 26,000 years ago, sea level was much lower than it is today partly because the ice sheets that jut out from the continent of Antarctica were enormous and covered by grounded ice -- ice that was fully attached to the seafloor. As the planet warmed, the ice sheets melted and contracted, and sea level began to rise. Researchers have discovered new information that illuminates how and when this global phenomenon occurred.

Astronomers use Earth's natural history as guide to spot vegetation on new worlds

Mon, 09/24/2018 - 16:44
By looking at Earth's full natural history and evolution, astronomers may have found a template for vegetation fingerprints -- borrowing from epochs of changing flora -- to determine the age of habitable exoplanets.

National parks bear the brunt of climate change

Mon, 09/24/2018 - 08:16
Human-caused climate change has exposed US national parks to conditions hotter and drier than the rest of the nation, says a new study quantifying for the first time the magnitude of climate change on all 417 parks in the system. Without action to limit greenhouse gas emissions, many small mammals and plants may be brought to the brink of extinction by the end of the century, the study shows.

Glacial engineering could limit sea-level rise, if we get our emissions under control

Thu, 09/20/2018 - 09:21
Targeted engineering projects to hold off glacier melting could slow down ice-sheet collapse and limit sea-level rise, according to a new study. While an intervention similar in size to existing large civil engineering projects could only have a 30 percent chance of success, a larger project would have better odds of holding off ice-sheet collapse. But the researchers caution that reducing emissions still remains key to stopping climate change and its dramatic effects.

Scientists identify three causes of Earth's spin axis drift

Wed, 09/19/2018 - 18:59
Using observational and model-based data spanning the entire 20th century, scientists have for the first time have identified three broadly-categorized processes responsible for Earth's spin axis drift -- contemporary mass loss primarily in Greenland, glacial rebound, and mantle convection.

Unprecedented ice loss in Russian ice cap

Wed, 09/19/2018 - 13:49
In the last few years, the Vavilov Ice Cap in the Russian High Arctic has dramatically accelerated, sliding as much as 82 feet a day in 2015, according to a new multi-national, multi-institute study. That dwarfs the ice's previous average speed of about 2 inches per day and has challenged scientists' assumptions about the stability of the cold ice caps dotting Earth's high latitudes.

Moderate warming could melt East Antarctic Ice Sheet

Wed, 09/19/2018 - 12:30
Parts of the world's largest ice sheet would melt if Antarctic warming of just 2°C is sustained for millennia, according to international research. Scientists used evidence from warm periods in Earth's history to see how the East Antarctic Ice Sheet might react to a warming climate.

Natural climate oscillations in north Atlantic linked to Greenland ice sheet melt

Tue, 09/18/2018 - 10:08
Scientists have known for years that warming global climate is melting the Greenland Ice Sheet, the second largest ice sheet in the world. A new study, however, shows that the rate of melting might be temporarily increased or decreased by two existing climate patterns: the North Atlantic Oscillation (NAO), and the Atlantic Multidecadal Oscillation (AMO).

Searching for clues on extreme climate change

Tue, 09/18/2018 - 07:20
Nearly 13,000 years ago, pines in southern France experienced a cold snap, which scientists have now reconstructed. The study about the consequences of a drastic climate change event in past and its implications for our future.

More ships and more clouds mean cooling in the arctic

Mon, 09/17/2018 - 14:36
Researchers recently modeled the future of trans-Arctic shipping routes and found that the accompanying increase in emissions may offset some of the overall warming trend in that region. Though the researchers stress this is in no way an endorsement to trans-Arctic shipping or a means to mitigate climate change, the results illustrate the complexities in understanding how human activities impact the climate.

World's first passive anti-frosting surface fights ice with ice

Mon, 09/17/2018 - 08:09
Nothing foretells the coming of winter like frost on windshields. While the inconvenience of scraping or defrosting car windows may define cold mornings for many drivers, the toll frost takes on the larger economy is more than just a nuisance. From delayed flights to power outages, ice buildup can cost consumers and companies billions of dollars every year in lost efficiency and mechanical breakdown.

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