Climate model biases in seasonality of continental water storage revealed by satellite gravimetry

被引:65
作者
Swenson, SC [1 ]
Milly, PCD
机构
[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA
[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[3] US Geol Survey, Princeton, NJ 08542 USA
关键词
D O I
10.1029/2005WR004628
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
[1] Satellite gravimetric observations of monthly changes in continental water storage are compared with outputs from five climate models. All models qualitatively reproduce the global pattern of annual storage amplitude, and the seasonal cycle of global average storage is reproduced well, consistent with earlier studies. However, global average agreements mask systematic model biases in low latitudes. Seasonal extrema of low-latitude, hemispheric storage generally occur too early in the models, and model-specific errors in amplitude of the low-latitude annual variations are substantial. These errors are potentially explicable in terms of neglected or suboptimally parameterized water stores in the land models and precipitation biases in the climate models.
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页数:7
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