Hydrology and Land Surface Studies
Assessing a land surface model's improvements with GRACE estimates
Article first published online: 6 APR 2006
Copyright 2006 by the American Geophysical Union.
Geophysical Research Letters
Volume 33, Issue 7, April 2006
How to Cite
2006), Assessing a land surface model's improvements with GRACE estimates, Geophys. Res. Lett., 33, L07401, doi:10.1029/2005GL025555., and (
- Issue published online: 6 APR 2006
- Article first published online: 6 APR 2006
- Manuscript Accepted: 1 MAR 2006
- Manuscript Revised: 7 FEB 2006
- Manuscript Received: 20 DEC 2005
 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.