Greenland and Antarctic Mass Balances for Present and Doubled Atmospheric CO2 from the GENESIS Version-2 Global Climate Model
Greenland and Antarctic Mass Balances for Present and Doubled Atmospheric CO2 from the GENESIS Version-2 Global Climate Model
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DOI：
10.1175/1520-0442(1997)010
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发表时间：
1997-05
影响因子：
4.9
通讯作者：
S. Thompson;D. Pollard
中科院分区：
文献类型：
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作者：
S. Thompson;D. Pollard
随着下个世纪人为温室效应的发生，格陵兰岛和南极洲物质平衡的变化可能会加速，并可能对全球海平面产生重大影响。最近的趋势和未来可能的变化，这些质量平衡已经得到了相当大的关注，在冰川学文献，但直到最近相对较少的大气环流模型（GCM）的研究集中在这个问题上。然而，有两个重要的问题，在使用GCM预测冰盖的质量平衡分布：（一）相对粗糙的GCM水平分辨率截断冰盖侧翼和较小的冰盖，如格陵兰岛的地形，和（二）在大多数GCM的雪和冰的物理不包括冰盖的具体过程，如融水的再冻结。描述了两种技术，攻击这些问题，涉及（一）海拔为基础的校正的表面气象和（二）一个简单的后验修正的refreezi…
Abstract As anthropogenic greenhouse warming occurs in the next century, changes in the mass balances of Greenland and Antarctica will probably accelerate and may have significant effects on global sea level. Recent trends and possible future changes in these mass balances have received considerable attention in the glaciological literature, but until recently relatively few general circulation modeling (GCM) studies have focused on the problem. However, there are two significant problems in using GCMs to predict mass balance distributions on ice sheets: (i) the relatively coarse GCM horizontal resolution truncates the topography of the ice-sheet flanks and smaller ice sheets such as Greenland, and (ii) the snow and ice physics in most GCMs does not include ice-sheet-specific processes such as the refreezing of meltwater. Two techniques are described that attack these problems, involving (i) an elevation-based correction to the surface meteorology and (ii) a simple a posteriori correction for the refreezi...