Sentences with phrase «ice stream retreat»

Recent glacial history and rapid ice stream retreat in the Amundsen Sea.

Episodic retreat is recorded by mega-scale glacial lineations that are overprinted by transverse grounding - zone wedges, each recording a pause in ice stream retreat with a stationary grounding line.

The Zachariae ice stream retreated about 20 kilometers (12.4 miles) over the last decade, the researchers concluded.

The grounding line of the ice stream retreated rapidly following ice - shelf collapse26.

Not exact matches

In comparison, it took the Jakobshavn Isbræ ice stream — a southwest Greenland region with a fast - moving glacier that has been a focal point of scientific examination of ice sheet melt — 150 years to retreat 35 kilometers, said Khan.

The new result focuses on ice loss due to a major retreat of an outlet glacier connected to a long «river» of ice — known as an ice stream — that drains ice from the interior of the ice sheet.

For comparison, one of the fastest moving glaciers, the Jakobshavn ice stream in southwest Greenland, has retreated 35 kilometers (21.7 miles) over the last 150 years.

Ice - stream behaviour and grounding line retreat is therefore unique to every ice streIce - stream behaviour and grounding line retreat is therefore unique to every ice streice stream.

Flow and retreat of the Late Quaternary Pine Island - Thwaites palaeo - ice stream, West Antarctica.

A model of a polar ice stream, and future sea - level rise due to possible drastic retreat of the West Antarctic ice sheet.

Shipp, S.S., Wellner, J.S., and Anderson, J.B., Retreat significance of a polar ice stream: sub-glacial geomorphic features and sediments from the Ross Sea, Antarctica: J.A. Dowdeswell and C. O'Cofaigh (eds.)

Even under the same changes in environmental conditions and external forcings, ice streams will retreat at individual rates.

For the LIM experiment, we enlisted James Fastook to incorporate the marine instability mechanism published by Robert Thomas in 1977 to make grounded ice margins retreat when ice downdrawn by ice streams became thin enough to become afloat along the WAIS marine margins.

«We think the recent snowy winters could be caused by the retreating Arctic ice altering atmospheric circulation patterns by weakening westerly winds, increasing the amplitude of the jet stream and increasing the amount of moisture in the atmosphere,»

Sea ice this year is melting at a pace two to four weeks faster than normal as pulses of warm air have been streaming into the Arctic from eastern Siberia and northern Europe and sea ice has retreated early from the Beaufort Sea.

This summer, Jason Box and others at Ohio State University observed that Jakobhavns Isbrae retreated again, losing 15 km2, and maintaining an accelerated pace from the northern branch of the ice stream as opposed to the greater retreat and acceleration of the southern branch 2001 - 2005 (Box, 2008).

There have been many primarily anthropogenic changes in the past, but the major jet stream changes caused by the retreat of the North American Ice Shield seems to be much more determinative for Holocene changes in Saharan rainfall.

«Mid-latitude economies such as those in Europe and the United States could be threatened, for example, by a suggested link between sea - ice retreat and the strength and position of the jet stream, bringing extreme winter and spring weather,» the paper states.

If the current jet stream disruption is, as many believe, a consequence of Arctic ice retreat, the failure to predict it is perhaps connected.

Earlier this year, climate scientist Marco Tedesco of Columbia University published data supporting an earlier proposal that the retreat of Arctic sea ice has disrupted the polar jet stream, causing weather systems to meander more slowly from west to east.