Sentences with phrase «ice sheets melted back»

But it was long suspected that «orbital factors» weren't the whole story, as the southern hemisphere ice sheets melted back at the same time as the northern ones.

«The last time the Arctic was significantly warmer than present day, the Greenland Ice Sheet melted back the equivalent of two to three meters (about six to ten feet) of sea level.»

Not exact matches

That CO2 then warmed the globe, melting back the continental ice sheets and ushering in the current climate that enabled humanity to thrive.

For millennia, Greenland's ice sheet reflected sunlight back into space, but satellite measurements in recent years suggest the bright surface is darkening, causing solar heat to be absorbed and surface melting to accelerate.

Melting of ice shelves does not directly contribute to sea - level rise, but instead they hold back water frozen in the larger ice sheet that will cause sea levels to rise.

«Coincidentally, when melting took off, the ice sheet began pulling back from the coast and the calving of icebergs diminished.

However, as climate change raises global air temperatures, it is possible that East Antarctic glaciers could start melting, a change that could make the ice sheet shift back into unstable territory.

Immense ice sheets slowly advance across northern lands, then suddenly melt away to leave the planet basking in a relatively brief period of warmth before the ice creeps back again.

The melting of the Greenland ice sheet trigger accelerated sea level rise, a die back of the Amazon rainforest removes a crucial atmospheric carbon sink, and an alteration of the ocean conveyor belt shuts down the Atlantic Gulf stream.

When an icy impact occurred, the impactor's kinetic energy became heat energy, instantly melted some ice, gouged out a crater, and kicked up into Mars» thin atmosphere large amounts of debris mixed with water (liquid, ice crystals, and vapor)-- and complex organic molecules that obviously came recently from life.127 Then, the dirt and salt - water mixture settled back to the surface in vast layers of thin sheets — strata — especially around the crater.

On the other hand, during those periods between widespread glaciation, the water had melted from the ice sheets and polar areas, flowed, back into the oceans and sea level was as high or higher than now.

[Response: Here's a simple back - of - envelope consideration for the future: if the Greenland ice sheet melts completely over the next ~ 1,000 years (Jim Hansen argues in the current Climatic Change that the time scale could be centuries), this would contribute an average flux of ~ 0.1 Sv of freshwater to the surrounding ocean.

Wilson (1964); Wilson (1966); Wilson (1969); Wilson's starting - point was the suggestion that the center of Antarctica was at the pressure melting point, see Robin (1962), p. 141, who adds that «one would not expect the ice to surge over a large part of Antarctica at one time»; the role of frictional heat in ice - sheet instability was pointed out back in 1961 (in partial support of Ewing - Donn theory), drawing on earlier work by G. Bodvarsson, by Weertman (1961).

Generally yes, but there has been a lot of new information learned since the IPCC Third Assessment Report (e.g., on trends in hurricane intensity, the accelerated melting back of Arctic sea ice, the intensifying deterioration of the edges of the Greenland Ice Sheet, etc.) and Gore's presentation of the science has been updated to account for these, drawing from what are the really highly reviewed and high quality papers by leading scientisice, the intensifying deterioration of the edges of the Greenland Ice Sheet, etc.) and Gore's presentation of the science has been updated to account for these, drawing from what are the really highly reviewed and high quality papers by leading scientisIce Sheet, etc.) and Gore's presentation of the science has been updated to account for these, drawing from what are the really highly reviewed and high quality papers by leading scientists.

The vulnerability of the West Antarctic Ice Sheet, or WAIS, has been appreciated for a long time; all the way back in 1968, an eccentric Ohio State glaciologist named John Mercer observed that the WAIS was peculiarly unstable, and that it may have melted away in the geologically recent past.

This pink clay can be traced back to 400 million years old red sand stones at Svalbard, and was carried out to sea by melt water from the ice sheet.

Global warming may not affect sea levels, study finds — January 11, 2008 Excerpt: Excerpt: The most pessimistic predictions of sea level rises as ice sheets are melted by global warming may have to be scaled back as a result of an extraordinary discovery that ice persisted when the Earth was much hotter than today.

According to NOAA's 2012 Arctic Report Card, the duration of melting at the surface of the ice sheet in summer 2012 was the longest since satellite observations began in 1979, and the total amount of summer melting was nearly double the previous record, set in 2010 (satellite records of melting go back to 1979.)

From KU Leuven and the «department of annoying back - radiation» comes this claim that flies in the face of the «big melt» under «thin clouds» aka nearly clear skies back in July 2012 Clouds play a bigger role in the melting of the Greenland ice sheet than was previously assumed.

The Earth's crust is responding to rising temperatures: volcanoes previously imprisoned below ice sheets are more likely to erupt; earthquakes in the Himalayas, the Andes and Alaska may be triggered as the ice load shrinks; and, the solid Earth beneath Greenland is bouncing back quickly as the ice above it melts, perhaps with the Antarctic land mass not far behind.

Back in 2012, disturbing new footage from NASA satellites showed that the massive island's ice sheet was undergoing an unprecedented melt, resulting in a 97 percent loss of the surface sheet by mid-July.

Melt of the Greenland ice sheet is further enhanced by a prolonged inflow of warm, moist air traced back to Arctic sea ice loss.

From the Greenland cores there are two really important considerations; (1) ~ 130k DOES NOT get us back to the start of the last interglacial, from which one can infer that the Greenland sheet may have completely melted away during the inception and early millenia of the Eemian, and (2) the better resolution of Greenland ice (as opposed to Antarctic ice) has repeatedly shown that temperature changes precede CO2 changes.

A look back on a landmark study, weird weather, Greenland's ice sheet melt, and other highlights that shaped climate change science news last year...

and temperature shows a drop (1 °C) but immediately after that a rise of 4 °C, while ice sheets melt further back to minimum.

And geologists have hypothesized for several decades that land in this area, pushed up by the weight of a pre-historic ice sheet to the north, has been settling back down since the ice melted.

The continental ice sheets began to melt back about 20,000 years ago.