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Mass balance of the Greenland Ice Sheet from 1992 to 2018 期刊论文
NATURE, 2020, 579 (7798) : 233-+
作者:  Scudellari, Megan
收藏  |  浏览/下载：30/0  |  提交时间：2020/04/16

The Greenland Ice Sheet has been a major contributor to global sea-level rise in recent decades(1,2), and it is expected to continue to be so(3). Although increases in glacier flow(4-6) and surface melting(7-9) have been driven by oceanic(10-12) and atmospheric(13,14) warming, the magnitude and trajectory of the ice sheet'  s mass imbalance remain uncertain. Here we compare and combine 26 individual satellite measurements of changes in the ice sheet'  s volume, flow and gravitational potential to produce a reconciled estimate of its mass balance. The ice sheet was close to a state of balance in the 1990s, but annual losses have risen since then, peaking at 345 +/- 66 billion tonnes per year in 2011. In all, Greenland lost 3,902 +/- 342 billion tonnes of ice between 1992 and 2018, causing the mean sea level to rise by 10.8 +/- 0.9 millimetres. Using three regional climate models, we show that the reduced surface mass balance has driven 1,964 +/- 565 billion tonnes (50.3 per cent) of the ice loss owing to increased meltwater runoff. The remaining 1,938 +/- 541 billion tonnes (49.7 per cent) of ice loss was due to increased glacier dynamical imbalance, which rose from 46 +/- 37 billion tonnes per year in the 1990s to 87 +/- 25 billion tonnes per year since then. The total rate of ice loss slowed to 222 +/- 30 billion tonnes per year between 2013 and 2017, on average, as atmospheric circulation favoured cooler conditions(15) and ocean temperatures fell at the terminus of Jakobshavn Isbr AE(16). Cumulative ice losses from Greenland as a whole have been close to the rates predicted by the Intergovernmental Panel on Climate Change for their high-end climate warming scenario(17), which forecast an additional 70 to 130 millimetres of global sea-level rise by 2100 compared with their central estimate.


  
Decadal-Scale Climate Forcing of Alpine Glacial Hydrological Systems 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (3) : 2478-2492
作者:  Lane, S. N.;  Nienow, P. W.
收藏  |  浏览/下载：14/0  |  提交时间：2019/11/26
subglacial hydrology  runoff  discharge  diurnal  glacier  climate change  
A Coupled Glacier-Hydrology Model and Its Application in Eastern Pamir 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (24) : 13692-13713
作者:  Ren, Zheng;  Su, Fengge;  Xu, Baiqing;  Xie, Ying;  Kan, Baoyun
收藏  |  浏览/下载：39/0  |  提交时间：2019/04/09
energy-balance glacier-melt scheme  coupled VIC-glacier model  glacier runoff  hydrological simulation  eastern Pamir  
Dynamic Response of a High Arctic Glacier to Melt and Runoff Variations 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (10) : 4917-4926
作者:  van Pelt, Ward J. J.;  Pohjola, Veijo A.;  Pettersson, Rickard;  Ehwald, Lena E.;  Reijmer, Carleen H.;  Boot, Wim;  Jakobs, Constantijn L.
收藏  |  浏览/下载：15/0  |  提交时间：2019/04/09
glacier dynamics  runoff  climate change  High Arctic  
Tracing biogeochemical subsidies from glacier runoff into Alaska's coastal marine food webs 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (1) : 387-398
作者:  Arimitsu, Mayumi L.;  39;Arcy N.
收藏  |  浏览/下载：23/0  |  提交时间：2019/04/09
delta C-13  delta N-15 Delta C-14  delta H-2  Bayesian isotope mixing model  glacier runoff  marine ecosystem  marine food web