DOI: 10.5194/tc-8-1087-2014
Scopus记录号: 2-s2.0-84903164820
论文题名: The effect of climate forcing on numerical simulations of the cordilleran ice sheet at the last glacial maximum
作者: Seguinot J ; , Khroulev C ; , Rogozhina I ; , Stroeven A ; P ; , Zhang Q
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 3 起始页码: 1087
结束页码: 1103
语种: 英语
英文关键词: climate effect
; climate forcing
; Cordilleran Ice Sheet
; geomorphological response
; glacier mass balance
; Last Glacial Maximum
; numerical model
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74834
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 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
Recommended Citation:
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]. Cryosphere,2014-01-01,8(3)