Sentences with phrase «ice sheet margins in»

Current events surrounding increased oceanic heat around ice sheet margins in Antarctic are expected to play a dynamical role in marine terminating glacial ice loss acceleration there as well.

A team from Rutgers University and the University of Georgia, led by Asa Rennermalm of Rutgers, measures meltwater runoff from the ice sheet margin in Greenland during summer 2013.

Not exact matches

«If protective ice shelves were suddenly lost in the vast areas around the Antarctic margin where reverse - sloping bedrock (where the bed on which the ice sheet sits deepens toward the continental interior, rather than toward the ocean) is more than 1,000 meters deep, exposed grounding line ice cliffs would quickly succumb to structural failure as is happening in the few places where such conditions exist today,» the researchers point out.

A study of the demise of the Laurentide Ice Sheet that once covered Canada may help scientists better understand shrinking ice fields today — like this melting ice margin in GreenlaIce Sheet that once covered Canada may help scientists better understand shrinking ice fields today — like this melting ice margin in Greenlaice fields today — like this melting ice margin in Greenlaice margin in Greenland.

«The beds at the margins of the ice sheet... are probably one of the least explored parts of Earth's surface,» said Ian Howat, a glaciologist at Ohio State University who did not participate in the research.

The full study, «Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets,» was published in Nature (subs.

He told the Climate News Network: «While the sparse existing observations do not indicate warmer water inflow towards the Wilkes ice sheet margin at present, there is no reason why changes similar to those in West Antarctica could not also occur here.»

[this is useful, the pre-ice age era, ~ 2.5 — 3.6 million years ago, last time CO2 levels were as high as today] In response to Pliocene climate, ice sheet models consistently produce near - complete deglaciation of the Greenland ice sheet (+7 m) and West Antarctic ice sheet (+4 m) and retreat of the marine margins of the Eastern Antarctic ice sheet (+3 m)(Lunt et al., 2008; Pollard and DeConto, 2009; Hill et al., 2010), altogether corresponding to a global mean sea level rise of up to 14 m.

The sea - level estimates are consistent with those from delta18O curves and numerical ice sheet models, and imply a significant sensitivity of the WAIS and the coastal margins of the EAIS to orbital oscillations in insolation during the Mid-Pliocene period of relative global warmth.

The margins of all ice sheets (including Greenland) are in retreat, and accumulation is negative over almost the whole of the West Antarctic sheet.

The ice sheet is almost 2,400 kilometres long in a north - south direction, and its greatest width is 1,100 kilometres at a latitude of 77 ° N, near its northern margin.

The European Space Agency's CryoSat - 2 mission has enhanced Antarctic ice sheet monitoring by including areas closer to the poles than earlier satellites, and by acquiring better data in moderately sloping areas, including ice sheet margins where most of the ice loss occurs.

Coincident with rift formation was the sudden disintegration of the ice mélange that filled the northern shear margin, resulting in ice sheet detachment from this margin.

However, this is balanced by substantial ice sheet losses on margins especially in West Antarctica as calving rates accelerate.

Such an extended ice sheet associated with strong katabatic winds should have caused polynya - like open - water conditions in front of the ice sheet (Fig. 5a), resulting in increased fluxes of phytoplankton, ice algae and terrigenous matter as observed in the PS2757 - 8 record (Fig. 2c and Fig. 6, Scenario 2), i.e., a situation similar to that proposed for the Barents Sea continental margin (Fig. 5a) 57, 58.

Joughin and others, 2008 observed that seasonal drainage of meltwater to the glacier bed induces a uniform acceleration of 50 — 150 meters / year over a ~ 300 km long section of the West Greenland margin that is not drained by outlet glaciers, causing a large fractional acceleration of the interior ice sheet but a small fractional change in the speed of fast - moving outlet glaciers.

«This implies that changes at the margin can affect the mass balance deep in the centre of the ice sheet,» said Dr Khan.

In northwest Greenland there is a 70 - km stretch of the margin of the ice sheet called the Crimson Cliffs.

Josh Willis, a lead NASA scientist for the Jason missions, which measure sea level rise from space and Ocean's Melting Greenland (OMG), is a passionate communicator about human - caused global warming.Come listen to a talk on what his team has found out about the role of the oceans in ice loss around the margins of the Greenland Ice Sheice loss around the margins of the Greenland Ice SheIce Sheet.

In any case, there is abundant evidence that the ice sheet is getting thinner (and quickly) along the margins.

The evidence comes from a remarkable find at the margins of the Quelccaya ice cap in Peru, the world's largest tropical ice sheet.