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overshooting thunderheads observed from ats and learjetOvershooting tops of thunderstorms were photographed simultaneously from both ATS and a Learjet during the cloud-truth experiment over the Midwest in the Spring of 1972 and 1973. The characteristics of overshooting tops were studied in various time and space scales, revealing that the horizontal dimensions of overshooting tops vary between 1000 ft and about 10 miles. The period of overshooting turrets with horizontal dimensions of less than 1 mile is found to be comparable to the Brunt-Vaisalla frequency of gravity waves at the lowermost stratosphere. The up-and-down motion of an overshooting dome, consisting of a number of turrets, is much slower than that of individual turrets. It is assumed that the height of a dome is closely related to the intensity of the up and downdrafts beneath the dome. Emphasis is placed upon the importance of the investigation of overshooting domes toward the identification of severe storm characteristics from satellites.
Document ID
19740018973
Document Type
Contractor Report (CR)
Authors
Fujita, T. T.
(Chicago Univ. Chicago, IL, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1974
Subject Category
METEOROLOGY
Report/Patent Number
NASA-CR-138595
SMRP-RP-117
Funding Number(s)
CONTRACT_GRANT: NGR-14-001-008
CONTRACT_GRANT: NOAA-04-4-158-1
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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