Sentences with phrase «ice loss rates of»

For short periods, it peaked at ice loss rates of over 3000 cubic kilometres per year.»

For short periods, it peaked at ice loss rates of over 3000 cubic kilometres per year.»

Not exact matches

Even worse, there are signs that the rate of ice loss is increasing.

«Loss of ice shelves surrounding the Antarctic continent could have a major effect on the rate of ice flow off the continent,» Scambos notes.

Based on what we know, we can expect the rapid ice loss to continue for a long time yet, especially if ocean - driven melting of the ice shelf in front of Pine Island Glacier continues at current rates,»

They then used the satellite record of Arctic sea ice extent to calculate the rates of sea ice loss and then projected those rates into the future, to estimate how much more the sea ice cover may shrink in approximately three polar bear generations, or 35 years.

By lubricating the bedrock, it will speed the flow of the overlying ice, perhaps increasing the rate of ice - mass loss in West Antarctica.

The rates and geographic extent of ice loss are «very surprising,» says radar altimetry expert Curt Davis of the University of Missouri, Kansas City.

Glaciologists worldwide use these and other maps in modeling the rate of ice loss in Greenland and projecting future losses.

In 2008 a satellite study based on rates of snowfall and ice movement estimated a loss of 210 cubic kilometers of ice per year — a 59 percent increase in the past decade.

«Until the rate and likely duration of sea ice losses as well as the ensuing ecosystem responses are better understood, closing the U.S. Arctic to commercial fishing is a prudent measure.»

However, the rate of ice loss picked up during July, when the sun is still strong.

Many researchers think this is unrealistic and that the rate of ice loss will accelerate, which means that sea level could rise much faster than predicted.

The IPCC's latest prediction for sea level rise — 0.2 to 0.6 metres by 2100 — takes this ice loss into account but it is based on the assumption that the rate of ice loss will remain constant.

The first comprehensive survey of all Antarctic ice shelves discovered that basal melt, or ice dissolving from underneath, accounted for 55 percent of shelf loss from 2003 to 2008 — a rate much higher than previously thought.

Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of sea level rise to the observed warming.

Lead author Dr Malcolm McMillan from the University of Leeds said: «We find that ice losses continue to be most pronounced along the fast - flowing ice streams of the Amundsen Sea sector, with thinning rates of between 4 and 8 metres per year near to the grounding lines of the Pine Island, Thwaites and Smith Glaciers.»

New research suggests that as early as 2090, rates of ice loss at the site could exceed gains from new snowfall.

But that could soon change, Rignot said, because the rate at which ice sheets are losing mass is increasing three times faster than the rate of ice loss from mountain glaciers and ice caps.

Khazendar and his team, analyzing their direct radar measurements, found stunning rates of ice loss from the glaciers» undersides on the ocean sides of their grounding lines.

The IceCon project [8] is investigating Antarctic ice mass balance - the rate of loss of ice from the continent.

[7] The IceCon project aims to gain a better understanding of the rate of the loss of ice — now and in the past - from the Antarctic ice sheet in the Dronning Maud Land area, and includes six partners: Université Libre de Bruxelles, Royal Observatory of Belgium, University of Luxembourg, Norwegian Polar Institute, and Aberystwyth University.

The team also compared the ice loss up until the mid-1980s to that observed by satellites over roughly the last decade and found that today the rate of ice loss is twice the 20th century average, mostly because of increased water runoff from the ice sheet's surface.

Since 1979, winter sea ice extent has decreased 3.2 percent per decade (the loss is much more pronounced in summer at a rate of 13.4 percent per decade).

Other researchers look at raised beaches [32] and palaeo lakes to record previous rates of isostatic uplift and rates of sea level rise [33, 34]; this can help constrain previous ice volumes and rates of ice loss.

The rate of release from the tundra alone is predicted to reach 1.5 billion tons of carbon per annum before 2030, contributing to accelerated climate change, perhaps resulting in sustained decadal doubling of ice loss causing collapse of the Greenland Ice Sheet (Hansen et al, 201ice loss causing collapse of the Greenland Ice Sheet (Hansen et al, 201Ice Sheet (Hansen et al, 2011).

Joughin et al. (2010) applied a numerical ice sheet model to predicting the future of PIG, their model suggested ongoing loss of ice mass from PIG, with a maximum rate of global sea level rise of 2.7 cm per century.

This kind of significant change could increase the rate of warming already in progress, affect further sea ice loss in the Arctic and alter shipping access to the Arctic Ocean.

Rates of sea - level rise calculated from tide gauge data tend to exceed bottom - up estimates derived from summing loss of ice mass, thermal expansion and changes in land storage.

IceCon aims to gain a better understanding of the rate of the loss of ice — now and in the past - from the Antarctic ice sheet in the Dronning...

And since you have missed this acceleration you have assumed that the rate will remain at 3.3 mm / year for the rest of this century, despite ongoing observations of increases in ice mass loss in Greenland and parts of Antarctica.

For three particular mismatches — sea ice loss rates being much too low in CMIP3, tropical MSU - TMT rising too fast in CMIP5, or the ensemble mean global mean temperatures diverging from HadCRUT4 — it is likely that there are multiple sources of these mismatches across all three categories described above.

Our modelled values are consistent with current rates of Antarctic ice loss and sea - level rise, and imply that accelerated mass loss from marine - based portions of Antarctic ice sheets may ensue when an increase in global mean air temperature of only 1.4 - 2.0 deg.

Our experiments show a clear threshold in the relationship between the rate of sea - level rise, and the rate of (sea - level contributing) ice - sheet mass loss.

Non-linear rates of Antarctic ice loss under high rates of sea - level rise Golledge, Nick; Arnold, Richard; Levy, Richard; Naish, Tim

Now, this is why you are not thinking — let's assume that at any particular level of regional temperature, we can expect a certain loss rate — this is reasonable because, as you say, there is a lot of ice in Greenland.

From recent instrumental observations alone we are therefore unable to predict whether mass loss from these ice sheets will vary linearly with changes in the rate of sea - level rise, or if a non-linear response is more likely.

Nevertheless, some caution is in order in interpreting this to mean that current rates of rapid ice loss from West Antarctica represent a long term trend.

The sea ice loss rate seems to be very sensitive to model resolution and has improved in CMIP5 — implicating aspects of the model structure as the main source of the problem.

If you were to take the current rate of ice loss as a starting point, and assume a constant rate of acceleration, then by the end of the century, the annual loss rate would need to reach nearly 6,200 km ³ / yr, or nearly 23 times the current rate, to result in a cumulative 10 % loss.

One of the things about ice melting (and this goes for dynamic ice sheet effects as well) is that melt / loss rates increase more than linearly with temperature.

Under all RCP scenarios the rate of sea level rise will very likely exceed that observed during 1971 — 2010 due to increased ocean warming and increased loss of mass from glaciers and ice sheets.

For Greenland to lose 285,000 km ³ of ice in 89 years, the AVERAGE rate of loss would have to be more than 3,200 km ³ / yr, or nearly 12 times faster than the current loss rate (273 km ³ / yr).

Currently they are reporting on record ice losses in August, when the rate of decline typically decreases (but this year it kept right on melting as if it was July).

The authors of the study — Ricarda Winkelmann and Anders Levermann from the Potsdam Institute for Climate Impact Research, Ken Caldeira of the Carnegie Institution for Science and Andy Ridgwell of the University of Bristol — find that the loss of the entire Antarctic ice sheet would take millenniums, but up to 100 feet of sea level rise could result within 1,000 years, with the rate of the rise beginning to increase a century or two from now.

8) Accelerated mass loss in Greenland and / or Antarctica, perhaps with another huge ice shelf breaking off, but in any case coupled with another measurable rise in the rate of sea level rise, 9) The Fifth Assessment Report (2012 - 2013) really spelling out what we face with no punches pulled.

Chris, in my amateurish way, I have wondered whether there may be a bit of a slowdown in the rate of ice loss as the oldest ice melts.

IIRC, the limit on mass loss was attributed to the narrowness of passes in the mountains, but if the ice loss is behind the mountains as the ocean reaches beyond them, and mixes salt into the system with tides, then only the flushing of salt and icebergs via meltwater would limit the rate of melt in the (brand new) Greenland Sea.

However, although the Arctic is still not as warm as it was during the Eemian interglacial 125,000 years ago [e.g., Andersen et al., 2004], the present rate of sea ice loss will likely push the system out of this natural envelope within a century.

The contribution from glaciers and ice caps (not including Greenland and Antarctica), on the other hand, is computed from a simple empirical formula linking global mean temperature to mass loss (equivalent to a rate of sea level rise), based on observed data from 1963 to 2003.