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Influence of surface roughness of a desertA numerical simulation study, using the current GLAS climate GCM, was carried out to examine the influence of low bulk aerodynamic drag parameter in the deserts. The results illustrate the importance of yet another feedback effect of a desert on itself, that is produced by the reduction in surface roughness height of land once the vegetation dies and desert forms. Apart from affecting the moisture convergence, low bulk transport coefficients of a desert lead to enhanced longwave cooling and sinking which together reduce precipitation by Charney's (1975) mechanism. Thus, this effect, together with albedo and soil moisture influence, perpetuate a desert condition through its geophysical feedback effect. The study further suggests that man made deserts is a viable hypothesis.
Document ID
19840014041
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Sud, Y. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Smith, W. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Res. Rev., 1983
Subject Category
Meteorology And Climatology
Accession Number
84N22109
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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