Clear Air Turbulence analysis using isentropic methods.

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Authors
Jacobson, John H.
Subjects
clear air turbulence
isentropic analysis
objective analysis
Advisors
Wash, C.H.
Date of Issue
1986
Date
March 1986
Publisher
Language
en_US
Abstract
Isentropic analyses were completed subjectively and by the Petersen (1986) objective analysis scheme for a 24-h Clear Air Turbulence (CAT) outbreak over the midwest United States. The purpose of the study is to determine if areas of high CAT potential could be identified by subjective isentropic analyses, and then by the automated analyses produced by the Petersen objective analyses. A background of CAT theory and current CAT forecasting techniques are also presented. The synoptic situation indicates the importance of the jet stream structure in this case. The study reveals that analyzed areas of low Ri and high wind shear correspond very well to reports of CAT. The objective analysis performance is fair overall. It shows a distinctive weakness in the analysis of the wind speed, occasionally producing spurious wind maxima. Analyses of the mass field, frontal slope and Montgomery stream function, are quite successful
Type
Thesis
Description
Series/Report No
Department
Meteorology
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
97 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
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