Case Studies of the Distribution of CAT in the Troposphere and Stratosphere

Hans A. Panofsky The Pennsylvania State University, University Park

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John A. Dutton The Pennsylvania State University, University Park

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Kurt H. Hemmerich Environmental Sciences Services Administration

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G. McCreary Capt., U. S. Air Force

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N. V. Loving Air Force Flight Dynamics Laboratory, Dayton, Ohio

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Abstract

Two separate case studies of clear air turbulence are presented, one in the stratosphere over the Rocky Mountains, the other in the upper troposphere over the midwestern plains.

The mechanism in both situations appears to be similar. CAT occurs in strongly baroclinic zones with strong vertical wind shears and low Richardson numbers. There is a tendency for the most severe turbulence to be located at the edges of the baroclinic zones.

Abstract

Two separate case studies of clear air turbulence are presented, one in the stratosphere over the Rocky Mountains, the other in the upper troposphere over the midwestern plains.

The mechanism in both situations appears to be similar. CAT occurs in strongly baroclinic zones with strong vertical wind shears and low Richardson numbers. There is a tendency for the most severe turbulence to be located at the edges of the baroclinic zones.

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