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Improved ground hydrology calculations for global climate models (GCMs) - Soil water movement and evapotranspirationA physically based ground hydrology model is presented that includes the processes of transpiration, evaporation from intercepted precipitation and dew, evaporation from bare soil, infiltration, soil water flow, and runoff. Data from the Goddard Institute for Space Studies GCM were used as inputs for off-line tests of the model in four 8 x 10 deg regions, including Brazil, Sahel, Sahara, and India. Soil and vegetation input parameters were caculated as area-weighted means over the 8 x 10 deg gridbox; the resulting hydrological quantities were compared to ground hydrology model calculations performed on the 1 x 1 deg cells which comprise the 8 x 10 deg gridbox. Results show that the compositing procedure worked well except in the Sahel, where low soil water levels and a heterogeneous land surface produce high variability in hydrological quantities; for that region, a resolution better than 8 x 10 deg is needed.
Document ID
19890048572
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Abramopoulos, F.
(NASA Goddard Institute for Space Studies; Centel Sigma Data Services Corp. New York, United States)
Rosenzweig, C.
(NASA Goddard Institute for Space Studies; Columbia University New York, United States)
Choudhury, B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
September 1, 1988
Publication Information
Publication: Journal of Climate
Volume: 1
ISSN: 0894-8755
Subject Category
Meteorology And Climatology
Accession Number
89A35943
Distribution Limits
Public
Copyright
Other

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