DOI: 10.1175/JCLI-D-12-00557.1
Scopus记录号: 2-s2.0-84884958920
论文题名: Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model
作者: Lipscomb W.H. ; Fyke J.G. ; Vizcaíno M. ; Sacks W.J. ; Wolfe J. ; Vertenstein M. ; Craig A. ; Kluzek E. ; Lawrence D.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 19 起始页码: 7352
结束页码: 7371
语种: 英语
Scopus关键词: Arctic
; Coupled models
; Earth system model
; Greenland Ice Sheet
; Ice sheet
; Model implementation
; Surface mass balance
; Thermo-mechanical coupling
; Climate models
; Geometry
; Glacial geology
; Glaciers
; Sea level
; Computer simulation
; climate modeling
; computer simulation
; downscaling
; GIS
; ice margin
; ice sheet
; mass balance
; sea level change
; thermomechanics
; twentieth century
; twenty first century
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: The Glimmer Community Ice Sheet Model (Glimmer-CISM) has been implemented in the Community Earth System Model (CESM). Glimmer-CISM is forced by a surface mass balance (SMB) computed in multiple elevation classes in the CESM land model and downscaled to the ice sheet grid. Ice sheet evolution is governed by the shallow-ice approximation with thermomechanical coupling and basal sliding. This paper describes and evaluates the initial model implementation for the Greenland Ice Sheet (GIS). The ice sheet model was spun up using the SMB from a coupled CESM simulation with preindustrial forcing. The model's sensitivity to three key ice sheet parameters was explored by running an ensemble of 100 GIS simulations to quasi equilibrium and ranking each simulation based on multiple diagnostics. With reasonable parameter choices, the steady-state GIS geometry is broadly consistent with observations. The simulated ice sheet is too thick and extensive, however, in some marginal regions where the SMB is anomalously positive. The topranking simulations were continued using surface forcing from CESM simulations of the twentieth century (1850-2005) and twenty-first century (2005-2100, with RCP8.5 forcing). In these simulations the GIS loses mass, with a resulting global-mean sea level rise of 16mm during 1850-2005 and 60mm during 2005-2100. This mass loss is caused mainly by increased ablation near the ice sheet margin, offset by reduced ice discharge to the ocean. Projected sea level rise is sensitive to the initial geometry, showing the importance of realistic geometry in the spun-up ice sheet. © 2013 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51651
Appears in Collections: 气候变化事实与影响
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作者单位: Group T-3, Los Alamos National Laboratory, Los Alamos, Mexico; Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; Department of Geography, University of California, Berkeley, Berkeley, CA, United States; National Center for Atmospheric Research, Boulder, CO, United States; National Center for Atmospheric Research, Precision Wind, Boulder, CO, United States
Recommended Citation:
Lipscomb W.H.,Fyke J.G.,Vizcaíno M.,et al. Implementation and initial evaluation of the glimmer community ice sheet model in the community earth system model[J]. Journal of Climate,2013-01-01,26(19)