DOI: 10.5194/tc-7-469-2013
Scopus记录号: 2-s2.0-84937031136
论文题名: Estimating the Greenland ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR
作者: Fettweis X ; , Franco B ; , Tedesco M ; , Van Angelen J ; H ; , Lenaerts J ; T ; M ; , Van Den Broeke M ; R ; , Gallée H
刊名: Cryosphere
ISSN: 19940416
出版年: 2013
卷: 7, 期: 2 起始页码: 469
结束页码: 489
语种: 英语
英文摘要: To estimate the sea level rise (SLR) originating from changes in surface mass balance (SMB) of the Greenland ice sheet (GrIS), we present 21st century climate projections obtained with the regional climate model MAR (Modèle Atmosphérique Régional), forced by output of three CMIP5 (Coupled Model Intercomparison Project Phase 5) general circulation models (GCMs). Our results indicate that in a warmer climate, mass gain from increased winter snowfall over the GrIS does not compensate mass loss through increased meltwater run-off in summer. Despite the large spread in the projected near-surface warming, all the MAR projections show similar non-linear increase of GrIS surface melt volume because no change is projected in the general atmospheric circulation over Greenland. By coarsely estimating the GrIS SMB changes from GCM output, we show that the uncertainty from the GCM-based forcing represents about half of the projected SMB changes. In 2100, the CMIP5 ensemble mean projects a GrIS SMB decrease equivalent to a mean SLR of +4±2cm and +9±4cm for the RCP (Representative Concentration Pathways) 4.5 and RCP 8.5 scenarios respectively. These estimates do not consider the positive melt-elevation feedback, although sensitivity experiments using perturbed ice sheet topographies consistent with the projected SMB changes demonstrate that this is a significant feedback, and highlight the importance of coupling regional climate models to an ice sheet model. Such a coupling will allow the assessment of future response of both surface processes and ice-dynamic changes to rising temperatures, as well as their mutual feedbacks. © Author(s) 2013. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74988
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Geography, University of Liege, Liege, Belgium; City College of New York, City University of New York, New York, NY, United States; Institute for Marine and Atmospheric research (IMAU), Utrecht University, Netherlands; Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), Grenoble, France
Recommended Citation:
Fettweis X,, Franco B,, Tedesco M,et al. Estimating the Greenland ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR[J]. Cryosphere,2013-01-01,7(2)