DOI: 10.1175/JCLI-D-12-00588.1
Scopus记录号: 2-s2.0-84892455947
论文题名: Greenland surface mass balance as simulated by the community earth system model. part II: Twenty-first-century changes
作者: Vizcaíno M. ; Lipscomb W.H. ; Sacks W.J. ; van den Broeke M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 215
结束页码: 226
语种: 英语
Scopus关键词: Absorbed solar radiations
; Atmosphere-land interactions
; Climate prediction
; Ice sheet
; Long-wave radiation
; Near surface temperature
; Short-wave radiation
; Surface mass balance
; Ablation
; Atmospheric temperature
; Climate models
; Glacial geology
; Glaciers
; Sea ice
; Sea level
; Solar radiation
; Solvents
; Sun
; Computer simulation
; air-soil interaction
; albedo
; climate effect
; climate modeling
; climate prediction
; computer simulation
; energy flux
; GIS
; ice cover
; ice sheet
; mass balance
; sea level change
; snowpack
; twenty first century
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: This study presents the first twenty-first-century projections of surface mass balance (SMB) changes for the Greenland Ice Sheet (GIS) with the Community Earth System Model (CESM), which includes a new ice sheet component. For glaciated surfaces, CESM includes a sophisticated calculation of energy fluxes, surface albedo, and snowpack hydrology (melt, percolation, refreezing, etc.). To efficiently resolve the high SMB gradients at the ice sheet margins and provide surface forcing at the scale needed by ice sheet models, the SMB is calculated at multiple elevations and interpolated to a finer 5-km ice sheet grid. During a twenty-firstcentury simulation driven by representative concentration pathway 8.5 (RCP8.5) forcing, the SMB decreases from 372±100 Gt yr-1 in 1980-99 to -78 ±143 Gt yr-1 in 2080-99. The 2080-99 near-surface temperatures over the GIS increase by 4.7K (annual mean) with respect to 1980-99, only 1.3 times the global increase (+3.7 K). Snowfall increases by 18%, while surface melt doubles. The ablation area increases from 9% of the GIS in 1980-99 to 28% in 2080-99. Over the ablation areas, summer downward longwave radiation and turbulent fluxes increase, while incoming shortwave radiation decreases owing to increased cloud cover. The reduction in GIS-averaged July albedo from 0.78 in 1980-99 to 0.75 in 2080-99 increases the absorbed solar radiation in this month by 12%. Summer warming is strongest in the north and east of Greenland owing to reduced sea ice cover. In the ablation area, summer temperature increases are smaller due to frequent periods of surface melt. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
; BER, Office of Biological and Environmental Research
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51064
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geography, University of California, Berkeley, Berkeley, CA, United States; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; Group T-3, Los Alamos National Laboratory, Los Alamos, Mexico; National Center for Atmospheric Research, Boulder, CO, United States; Department of Geoscience and Remote Sensing, Delft Institute of Technology, Delft, Netherlands
Recommended Citation:
Vizcaíno M.,Lipscomb W.H.,Sacks W.J.,et al. Greenland surface mass balance as simulated by the community earth system model. part II: Twenty-first-century changes[J]. Journal of Climate,2014-01-01,27(1)