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Water Flowing Through Ice Sheets Accelerates Warming, Could Speed Up Ice Flow, Says New Study

By Guest PostNovember 7, 2010Environmentclimate change, climate warming, conventional thermal models, crevasses, fractures, greenland, ice flows, ice sheet, ice sheets, konrad steffen, melt water, moulins, thermal models, thomas phillips

Melt water flowing through ice sheets via crevasses, fractures and large drains called moulins can carry warmth into ice sheet interiors, greatly accelerating the thermal response of an ice sheet to climate change, according to a new study involving the University of Colorado at Boulder.

The new study showed ice sheets like the Greenland Ice Sheet can respond to such warming on the order of decades rather than the centuries projected by conventional thermal models. Ice flows more readily as it warms, so a warming climate can increase ice flows on ice sheets much faster than previously thought, said the study authors. (more…)

Whales Help Researchers Take Winter Temperature of Greenland’s Coastal Waters

By Guest PostOctober 29, 2010Environmentarctic flow, arctic whale, baffin bay, ecosystem, greenland, kristin laidre, north atlantic current, ocean temperatures, polar science center, unicorn horn, university of washington

WASHINGTON — Scientists using sensors attached to a type of Arctic whale known for its unicorn-horn-like tooth have detected continued warming of the southern Baffin Bay off West Greenland. The temperatures of the waters have continued to rise since wintertime ocean temperatures were last effectively measured there in the early 2000s, the researchers reported October 23 in the Journal of Geophysical Research – Oceans, a publication of the American Geological Union (AGU).

Temperatures in the study were collected by narwhals, a medium-sized whale species, during missions in 2006 and 2007. The animals were tagged with sensors that recorded ocean depths and temperatures during feeding dives from the surface pack ice to the seafloor, as deep as 1,773 meters, or more than a mile. (more…)

Ice Core Drilling Effort Involving CU-Boulder Should Help Assess Abrupt Climate Change Risks

By Guest PostAugust 3, 20102 commentsEnvironment, Sciencebedrock, climate change, cu-boulder, dorthe dahl-jensen, eemian, eemian ice drilling project, Germany, greenland, ice cores, ice sheet, interglacial period, j p steffensen, jim white, neem, north greenland, tyler jones, vasilii petrenko

Ice Core Drilling Effort Involving CU-Boulder Should Help Assess Abrupt Climate Change Risks An international science team involving the University of Colorado at Boulder that is working on the North Greenland Eemian Ice Drilling project hit bedrock July 27 after two summers of work, drilling down more than 1.5 miles in an effort to help assess the risks of abrupt future climate change on Earth.

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Tag Archives: greenland

Water Flowing Through Ice Sheets Accelerates Warming, Could Speed Up Ice Flow, Says New Study

Whales Help Researchers Take Winter Temperature of Greenland’s Coastal Waters

Ice Core Drilling Effort Involving CU-Boulder Should Help Assess Abrupt Climate Change Risks