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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：31/0  |  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.


  
Attribution of the Hemispheric Asymmetries in Trends of Stratospheric Trace Gases Inferred From Microwave Limb Sounder (MLS) Measurements 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (12) : 6283-6293
作者:  Han, Yuanyuan;  Tian, Wenshou;  Chipperfield, Martyn P.;  Zhang, Jiankai;  Wang, Feiyang;  Sang, Wenjun;  Luo, Jiali;  Feng, Wuhu;  Chrysanthou, Andreas;  Tian, Hongying
收藏  |  浏览/下载：24/0  |  提交时间：2019/11/26
stratospheric trace gas trend  hemispheric asymmetry  dynamical transport process  residual circulation  eddy mixing  
Regional Hydroclimatic Variability Due To Contemporary Deforestation in Southern Amazonia and Associated Boundary Layer Characteristics 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (8) : 3993-4014
作者:  Khanna, Jaya;  Medvigy, David;  Fisch, Gilberto;  de Araujo Tiburtino Neves, Theomar Trindade
收藏  |  浏览/下载：38/0  |  提交时间：2019/04/09
Amazon  Rondonia  deforestation  precipitation seasonality  surface roughness  dynamical circulation  
Three-pattern decomposition of global atmospheric circulation: part II-dynamical equations of horizontal, meridional and zonal circulations 期刊论文
CLIMATE DYNAMICS, 2018, 50: 2673-2686
作者:  Hu, Shujuan;  Cheng, Jianbo;  Xu, Ming;  Chou, Jifan
收藏  |  浏览/下载：21/0  |  提交时间：2019/04/09
Three-pattern decomposition of global atmospheric circulation  New dynamical equations of horizontal  meridional and zonal circulations  Three-dimensional vorticity equations  Simplified dynamical equations  
Final Report. Evaluating the Climate Sensitivity of Dissipative Subgrid-Scale Mixing Processes and Variable Resolution in NCAR's Community Earth System Model 科技报告
来源：US Department of Energy (DOE). 出版年： 2015
作者:  Jablonowski, Christiane
收藏  |  浏览/下载：15/0  |  提交时间：2019/04/05
Atmospheric General Circulation Models  Community Atmosphere Model (CAM  Spectral Element (CAM-SE)  variable-resolution  tropical cyclones  subgrid-scale diffusion  consistency  stratospheric dynamics  Dynamical Core Model Intercomparison Project (DCMIP)