气候变化领域集成服务门户(CCPortal): The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum

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DOI	10.5194/tc-8-1087-2014
	The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum
	Seguinot J.; Khroulev C.; Rogozhina I.; Stroeven A.P.; Zhang Q.
发表日期	2014
ISSN	19940416
卷号	8 期号:3
英文摘要	We present an ensemble of numerical simulations of the Cordilleran ice sheet during the Last Glacial Maximum performed with the Parallel Ice Sheet Model (PISM), applying temperature offsets to the present-day climatologies from five different data sets. Monthly mean surface air temperature and precipitation from WorldClim, the NCEP/NCAR reanalysis, the ERA-Interim reanalysis, the Climate Forecast System Reanalysis and the North American Regional Reanalysis are used to compute surface mass balance in a positive degree-day model. Modelled ice sheet outlines and volumes appear highly sensitive to the choice of climate forcing. For three of the four reanalysis data sets used, differences in precipitation are the major source for discrepancies between model results. We assess model performance against a geomorphological reconstruction of the ice margin at the Last Glacial Maximum, and suggest that part of the mismatch is due to unresolved orographic precipitation effects caused by the coarse resolution of reanalysis data. The best match between model output and the reconstructed ice margin is obtained using the high-resolution North American Regional Reanalysis, which we retain for simulations of the Cordilleran ice sheet in the future. © Author(s) 2014.
学科领域	climate effect; climate forcing; Cordilleran Ice Sheet; geomorphological response; glacier mass balance; Last Glacial Maximum; numerical model
语种	英语
scopus关键词	climate effect; climate forcing; Cordilleran Ice Sheet; geomorphological response; glacier mass balance; Last Glacial Maximum; numerical model
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120099
作者单位	Department of Physical Geography and Quaternary Geology and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
推荐引用方式 GB/T 7714	Seguinot J.,Khroulev C.,Rogozhina I.,et al. The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum[J],2014,8(3).
APA	Seguinot J.,Khroulev C.,Rogozhina I.,Stroeven A.P.,&Zhang Q..(2014).The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum.Cryosphere,8(3).
MLA	Seguinot J.,et al."The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum".Cryosphere 8.3(2014).