Sentences with phrase «glacier mass loss»

Sea level has risen since the early 1970s due to a combination of ocean thermal expansion and glacier mass loss (IPCC 2007 and IPCC 2013).

The authors concluded that, for the entire period, only 25 ± 35 percent of the glacier mass loss could be attributed to anthropogenic causes, but from 1991 to 2010, the glacier mass loss increased to 69 ± 24 percent.

Marzeion, B. et al. (2018) Limited influence of climate change mitigation on short - term glacier mass loss, Nature Climate Change, doi: 10.1038 / s41558 -018-0093-1

As noted above, major advances from GRACE and other datasets now permit analyses of glacier mass loss that were not possible previously.

High confidence that due to glacier mass loss there will be related impacts on hydropower production, ocean circulation, fisheries, and global sea level rise.

It is very likely that human activities have contributed to observed Arctic warming, sea ice loss, glacier mass loss, and a decline in snow extent in the Northern Hemisphere.

High confidence that glacier mass loss in Alaska and British Columbia is high, contributing 20 % to 30 % as much to sea level rise as does shrinkage of the Greenland Ice Sheet.

Attribution of global glacier mass loss to anthropogenic and natural causes.

Anthropogenic forcing, resulting in thermal expansion from ocean warming and glacier mass loss, has very likely contributed to sea level rise during the latter half of the 20th century.

The lower trend found by our study is consistent with the median projected sums of thermal expansion and glacier mass loss, implying that no net contribution from polar ice sheets is needed over 1901 - 1990.

Christopher A. Shuman Research Scientist, NASA Goddard Space Flight Center Specialties: Ice elevation changes and glacier mass losses using altimetry in combination with other remote sensing in the Antarctica Peninsula, the accuracy of early ICESat - 1 data, composite temperature records derived from AWS passive microwave data from SMMR and SSM / I and IR data from AVHRR

Not exact matches

The team found that, for the last 20 years, the glacier and ice cap mass loss has been exactly equal to the amount of meltwater runoff lost to the sea.

As a result, the coastal ice caps and glaciers lose their melting ice as run off 65 percent faster than they can recapture it — contributing to a loss of ice equivalent to roughly 14 percent of the total mass of Greenland.

Within a few years, the main outlet glacier draining the region — Zachariae Isstrom — retreated about 20 kilometers, and regional ice mass loss jumped from zero to roughly 10 metric gigatons a year.

At both locations, the long - term records show that summer warming has resulted in sustained mass loss, noted Shad O'Neel, head of the glacier research program at the USGS Alaska Science Center.

The results highlight how the interaction between ocean conditions and the bedrock beneath a glacier can influence the frozen mass, helping scientists better predict future Antarctica ice loss and global sea level rise.

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.

Whether the loss of mass by the glaciers is due to natural variation or is caused by human - influenced warming of the oceans is not known for sure.

The Greenland, and possibly the Antarctic, ice sheets have been losing mass recently, because losses by ablation including outlet glaciers exceed accumulation of snowfall.

«The signal of future glacier change in the region is clear: continued and possibly accelerated mass loss from glaciers is likely given the projected increase in temperatures,» Joseph Shea, a glacier hydrologist at the International Centre for Integrated Mountain Development (ICIMOD), Kathmandu, Nepal, who led the study, said in a statement.

The estimated 2010 or 2011 surface mass imbalance (~ 300 Gt / yr) is comparable to the GRACE estimates of the total mass loss (which includes ice loss via dynamic effects such as the speeding up of outlet glaciers) of 248 ± 43 Gt / yr for the years 2005 - 2009 Chen et al, 2011.

Notably, the quote «Mölg and Hardy (2004) show that mass loss on the summit horizontal glacier surfaces is mainly due to sublimation (i.e. turbulent latent heat flux) and is little affected by air temperature through the turbulent sensible heat flux.»

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.

However, the idea is simple, and I've talked about this much in many presentations this winter: Take the amount of ice you need to get rid of from Greenland to raise sea level 2 m in the next century, reduce it by your best estimate of the amount that would be removed by surface mass balance losses, and try to push the rest out of the aggregate cross-sectional area of Greenland's marine - based outlet glaciers.

That applies not only to the Australian drought, but to all aspects of climate change, whether it be loss of sea ice, loss of glaciers and ice caps, acidification of the oceans, desertification, mass migrations due to sea level rise, and so on.

Of course it would be nice to know exactly how and when we're going to really suffer — abrupt CC, runaway GW, mass extinction event, or just a linear ratcheting up of the same (floods, droughts, heatwaves, sea rise / land loss, disease spread, mega-storms, glacier melt, famines).

Most of the mass loss is from Pine Island Bay sector of West Antarctica and the northern tip of the Peninsula where it is driven by ongoing, pronounced glacier acceleration.

In the main text, they describe glaciers which have continued to have roughly constant mass balance loss, then neighboring glaciers which have suddenly sped up, with one going from a mass loss of 5 to 36 cubic kilometers in nine years.

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.

However, I would keep in mind the fact that over a decade's time, we have seen more than a doubling of the rate of loss of mass balance in Greenland, a tripling in icequakes, the warming of the West Antarctic Peninsula resulting in the acceleration of glaciers, the accelerating loss of global glacier mass balance, etc..

A rise in global mean sea level of between 0.09 and 0.88 metres by 2100 has been projected, mainly due to the thermal expansion of sea water and loss of mass from ice caps and glaciers».

SLR by 2100 is more likely to come from ice mass loss from West Antarctica (WAIS) where warm ocean currents are already melting ice at glacier mouths and attacking areas of the WAIS resting on the seabed.

These glaciers have gradually slowed in the following years, but calving and mass loss from other glaciers on the southeastern Greenland coast and the western coast continues.

The end result is the glaciers accelerate seaward, causing dynamic thinning, increased calving, and a large loss of ice mass that continues until a new equilibrium is established.

Ice mass loss is occuring at an accelerated rate in Greenland, Antarctica and globally from inland glaciers.

The main memory is through the warming of the oceans, manifested in part through the ongoing rise in sea level, and the loss of Arctic sea ice and glacier mass.

A glacier's mass is the net result of seasonal snow accumulation and seasonal ice loss.

Annual net balance on eight North Cascades glaciers during the 1984 - 1994 period has been determined by measurement, of total mass loss from firn and ice melt and, of residual snow depth at the end of the summer season.

Equilibrium line - The boundary between the region on a glacier where there is a net annual loss of ice mass (ablation area) and that where there is a net annual gain (accumulation area).

Just yesterday we had an example of a scientist who projected that Himalayan glaciers were losing ice at an an amazing rate correcting himself and cutting his own mass loss estimate by 30 %.

«It is very likely that the rate of global mean sea level rise during the 21st century will exceed the rate observed during 1971 — 2010 for all Representative Concentration Pathway (RCP) scenarios due to increases in ocean warming and loss of mass from glaciers and ice sheets.

For instance, Gregory and Oerlemans (1998) find that projected future glacier net mass loss is 20 % greater if local seasonal variation is neglected, and 20 % less if regional variation is not included.

They made a calculation of glacier net mass loss since 1865.

There was a rapid decline in Arctic sea ice and accelerating loss of net mass from the Greenland and Antarctic ice sheets and from the world's glaciers.

And with a new picture of which glaciers contribute most to mass loss, IceBridge will be able to more effectively target areas in future campaigns, promising more and better data to add to the research community's body of knowledge.

Climate change is causing significant mass loss of glaciers in high mountains worldwide.

«Combining the evidence from ocean warming and mass loss of glaciers we conclude that it is very likely that there is a substantial contribution from anthropogenic forcing to the global mean sea level rise since the 1970s.»

The earlier study reported that the region was losing three times this amount of ice, based on measurements of glacier thinning and mass loss determined from other satellite measurements.

«It is pretty clear that the Himalayan glaciers have been losing mass, with markedly greater loss in the past decade than earlier,»...

The mass loss of Greenland's outlet glaciers is not only expected to continue but to increase their acceleration as well.