Assessing a land surface model's improvements with GRACE estimates

被引：45

作者：

Niu, GY ^{[1
]}

Yang, ZL ^{[1
]}

机构：

[1] Univ Texas, John A & Katherine G Jackson Sch Geosci, Dept Geol Sci, Austin, TX 78712 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 07期

关键词：

D O I：

10.1029/2005GL025555

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Gravity Recovery and Climate Experiment ( GRACE) satellites have produced an unprecedented data set of terrestrial water storage (TWS) change in large-scale river basins. Recent research has found that monthly variations of soil moisture and snow water simulated by land surface models compared favorably with the GRACE-derived TWS change. Compared to the GRACE data, the standard version of the National Center for Atmospheric Research (NCAR) Community Land Model (CLM) produces a weaker TWS variability in tropical and mid-latitudes but a stronger TWS variation in high latitudes. However, a modified version of CLM that includes more realistic interception, runoff, and frozen soil processes improves the simulation of TWS change in global river basins of various scales. In addition, the modified CLM improves the modeling of evapotranspiration through the improvements in the modeling of TWS variation and runoff in the Amazon River basin. Along this line of research, this paper shows that such GRACE data can be used as a means of evaluating the hydrological schemes in a land surface model.

引用

页数：4

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