Accession Number:

AD0748540

Title:

The Measurement of Atmospheric Stability from 30 to Approximately 90 KM

Descriptive Note:

Corporate Author:

AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Report Date:

1972-01-01

Pagination or Media Count:

9.0

Abstract:

Three years of wind and temperature data determined from grenade experiments at six sites are used in the calculation of the Richardson number Ri. The results show that, for a critical Richardson number of 1, there is quite often a turbulent region around 85 km at all latitudes. Furthermore, the winter polar mesospheric data indicate a more intense turbulence that do the summer data. There also appears a region of marginal stability Ri about 1 at or slightly above the stratopause which is more often present during the winter season than in the summer. Latitudinal and seasonal distributions of Richardson number, wind shears and estimates of heating rates due to viscous dissipation of turbulent kinetic energy are given.

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE