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Record 12 of 228
Concerning the relationship between evapotranspiration and soil moisture
External Online Source: doi:10.1175/1520-0450(1987)026<0018:CTRBEA>2.0.CO;2
Author and Affiliation:
Wetzel, Peter J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Chang, Jy-Tai(SASC Technologies, Inc., Hyattsville, MD, United States)
Abstract: The relationship between the evapotranspiration and soil moisture during the drying, supply-limited phase is studied. A second scaling parameter, based on the evapotranspirational supply and demand concept of Federer (1982), is defined; the parameter, referred to as the threshold evapotranspiration, occurs in vegetation-covered surfaces just before leaf stomata close and when surface tension restricts moisture release from bare soil pores. A simple model for evapotranspiration is proposed. The effects of natural soil heterogeneities on evapotranspiration computed from the model are investigated. It is observed that the natural variability in soil moisture, caused by the heterogeneities, alters the relationship between regional evapotranspiration and the area average soil moisture.
Publication Date: Jan 01, 1987
Document ID:
19870052970
(Acquired Nov 28, 1995)
Accession Number: 87A40244
Subject Category: EARTH RESOURCES AND REMOTE SENSING
Document Type: Journal Article
Publication Information: Journal of Climate and Applied Meteorology (ISSN 0733-3021); 26; 18-27
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
SASC Technologies, Inc.; Hyattsville, MD, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EVAPOTRANSPIRATION; REMOTE SENSING; SATELLITE IMAGERY; SOIL MOISTURE; SCALING; VARIABILITY; VEGETATION
Imprint And Other Notes: Journal of Climate and Applied Meteorology (ISSN 0733-3021), vol. 26, Jan. 1987, p. 18-27. NASA-sponsored research.
Miscellaneous Notes: NASA-sponsored research
Availability Source: Other Sources
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