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Collapse of European ice sheet caused chaos in past

Science Daily - Mon, 06/26/2017 - 17:05
Scientists have reconstructed in detail the collapse of the Eurasian ice sheet at the end of the last ice age. The big melt wreaked havoc across the European continent, driving home the original Brexit 10,000 years ago.

Animals, not drought, shaped our ancestors' environment

Science Daily - Mon, 06/26/2017 - 14:57
The expansion of grasslands isn't solely due to drought, but more complex climate factors are at work, both for modern Africans now and ancient Africans in the Pleistocene, suggests new research.

Monitoring changes in wetland extent can help predict the rate of climate change

Science Daily - Mon, 06/26/2017 - 11:45
Monitoring changes to the amount of wetlands in regions where permafrost is thawing should be at the forefront of efforts to predict future rates of climate change, new research shows.

Tipping points are real: Gradual changes in CO2 levels can induce abrupt climate changes

Science Daily - Fri, 06/23/2017 - 09:04
During the last glacial period, within only a few decades the influence of atmospheric CO2 on the North Atlantic circulation resulted in temperature increases of up to 10 degrees Celsius in Greenland -- as indicated by new climate calculations.

Accelerating rate of temperature rise in the Pyrenees

Science Daily - Wed, 06/21/2017 - 09:31
The Iberian Peninsula is undergoing climate change, with temperatures on the rise, and mountain ranges are not exempt from this trend. A team of scientists has analyzed regional climate series from the Central Pyrenees for 1910 to 2013 (the most extensive climate records to date for the area), concluding that temperatures have risen at an increasing rate since 1970, particularly in spring and summer.

Ocean predicts future northwestern European and Arctic climate

Science Daily - Wed, 06/21/2017 - 09:01
There is a clear potential for practical and useful predictions of northwestern European and Arctic climate based on the state of the ocean, new research indicates.

Great opportunities for marine research with new underwater vehicle

Science Daily - Tue, 06/20/2017 - 08:45
An autonomous underwater vehicle offers promise for advanced marine research use. This will make it possible to conduct detailed studies of the seabed at great depths and track the climate thousands of years back in time, say researchers.

Wet and stormy weather lashed California coast... 8,200 years ago

Science Daily - Tue, 06/20/2017 - 08:32
An analysis of stalagmite records from White Moon Cave in the Santa Cruz Mountains shows that 8200 years ago the California coast underwent 150 years of exceptionally wet and stormy weather. This is the first high resolution record of how the Holocene cold snap affected the California climate.

Scientists throw light on mysterious ice age temperature jumps

Science Daily - Mon, 06/19/2017 - 11:58
Scientists believe they have discovered the reason behind mysterious changes to the climate that saw temperatures fluctuate by up to 15°C within just a few decades during the ice age periods.

Widespread snowmelt in West Antarctica during unusually warm summer

Science Daily - Thu, 06/15/2017 - 07:46
An area of West Antarctica more than twice the size of California partially melted in 2016 when warm winds forced by an especially strong El Nino blew over the continent.

Animal evolution: Hot start, followed by cold shock

Science Daily - Thu, 06/15/2017 - 07:45
The initial phases of animal evolution proceeded faster than hitherto supposed: New analyses suggest that the first animal phyla emerged in rapid succession -- prior to the global Ice Age that set in around 700 million years ago.

Ancient otter tooth found in Mexico suggests mammals migrated across America

Science Daily - Wed, 06/14/2017 - 08:29
An ancient otter tooth recently discovered in Mexico suggests certain mammals migrated across America during the Miocene geologic epoch, roughly 23 million to 5.3 million years ago. The new hypothesized route questions other theories such as migrations above Canada and through Panama, and has implications for a much larger biologic event -- the Great American Biotic Interchange, when land bridges were formed and animals dispersed to and from North America and South America.

Polar bears' declining mercury levels likely due to climate-related shifts

Science Daily - Wed, 06/14/2017 - 08:18
To understand how human activities are affecting the planet, scientists often study the health of animals in the wild. Now a new study finds that the levels of mercury in some polar bears are declining. But rather than heralding a drop in mercury in the environment, the decrease could indicate how climate change has led the animals to shift foraging habits, which has affected their diets and weight.

Large Canadian Arctic climate change study cancelled due to climate change

Science Daily - Tue, 06/13/2017 - 14:06
The Science Team of the Canadian Research Icebreaker CCGS Amundsen has cancelled the first leg of the 2017 Expedition due to complications associated with the southward motion of hazardous Arctic sea ice, caused by climate change.

Comets may have delivered significant portions of Earth's xenon

Science Daily - Thu, 06/08/2017 - 13:55
A new study suggests that roughly 22% of the element xenon found in Earth's atmosphere may have come from comets.

Sahara greening may intensify tropical cyclone activity worldwide

Science Daily - Thu, 06/08/2017 - 06:33
Future climate warming could lead to a re-greening of the southernmost Sahara (Sahel), with decreased dust emissions and changes in land cover. In a recent study, researchers have found that tropical cyclone activity may have increased during past warm climates in connection with a greening of the Sahara.

Finding new homes won't help emperor penguins cope with climate change

Science Daily - Wed, 06/07/2017 - 14:12
Unlike other species that migrate successfully to escape the wrath of climate change, a new study shows that dispersal may help sustain global Emperor penguin populations for a limited time, but, as sea ice conditions continue to deteriorate, the 54 colonies that exist today will face devastating declines by the end of this century.

Domes of frozen methane may be warning signs for new blow-outs

Science Daily - Mon, 06/05/2017 - 14:19
Several methane domes, some 500m wide, have been mapped on the Arctic Ocean floor. They may be signs of soon-to-happen methane expulsions that have previously created massive craters in a near-by area.

Antarctic ice rift close to calving, after growing 17km in 6 days, latest data from ice shelf shows

Science Daily - Fri, 06/02/2017 - 10:28
The rift in the Larsen C ice shelf in Antarctica has grown by 17km in the last few days and is now only 13km from the ice front, indicating that calving of an iceberg is probably very close, researchers revealed after studying satellite data. The rift is likely to lead to one of the largest icebergs ever recorded.

Massive craters formed by methane blow-outs from the Arctic sea floor

Science Daily - Thu, 06/01/2017 - 14:18
Hundreds of massive, kilometer-wide craters on the ocean floor in the Arctic were formed by substantial methane expulsions, new research explains.

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