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Effects of spatial variations of soil moisture and vegetation on the initiation of a local severe stormThe role of evapotranspiration in a prestorm environment and the way in which a local severe storm initiates under the influence of spatial variations of soil moisture and vegetation coverage are examined. The Goddard Mesoscale Atmospheric Simulation System (Kaplan et al., 1982) is used to study the case of an isolated but intense convective storm associated with the Grand Island, Nebraska, tornado on June 3-4, 1980. It is found that spatial variations of vegetation and soil moisture increase the surface temperature gradient, enhance the thermally direct ageostrophic circulation, intensify the surface pressure gradient, and enhance the geostrophic low-level southerly flow.
Document ID
19890031811
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chang, Jy-Tai (ST Systems Corp. Hyattsville, MD, United States)
Wetzel, Peter J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1988
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Conference on Numerical Weather Prediction
Location: Baltimore, MD
Country: United States
Start Date: February 22, 1988
End Date: February 26, 1988
Sponsors: American Meteorological Society
Accession Number
89A19182
Funding Number(s)
CONTRACT_GRANT: NAS5-28752
Distribution Limits
Public
Copyright
Other

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