Accession Number:

ADA019708

Title:

Stratospheric Turbulence and Vertical Effective Diffusion Coefficients

Descriptive Note:

Environmental research papers

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Personal Author(s):

Report Date:

1975-09-29

Pagination or Media Count:

14.0

Abstract:

Computations of the observed frequency distribution of the magnitudes of vertical shears of horizontal winds between 5 and 20 km altitude are reported. The probability distribution of turbulent layers for various values of vertical thickness is discussed. An effective vertical-diffusion coefficient, Ke, is estimated from a simple model using this empirical turbulence probability distribution. Specifically, the authors calculate the effect of clear-air turbulence CAT upon vertical transport, using a model consisting of a vertical column of thin, randomly-spaced mixing turbulent layers separated by thick non-mixing atmospheric layers.

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE