Accession Number : AD0714754

Title :   Characteristics of Turbulence in the Surface Boundary Layer in a Mountain Valley in Winter,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kurbatkin,V. P.

Report Date : 02 SEP 1970

Pagination or Media Count : 13

Abstract : Results are presented of studies carried out in the Pskem river valley (Tien-Shan mountains) in connection with weather modification tests made with ground-based aerosol generators. These studies required quantitative determinations of turbulence characteristics, especially of the coefficient of turbulence in this mountain valley during the winter. Gradient observations were made daily from 20 November 1965 to 10 March 1966 at 0700, 1000, 1300, 1600, 1900 and 2000 hr of the air temperature and winds at h equals 0.2, 0.5, 1.0, and 2.0 meters. Soil temperatures were measured during the mid-winter period. The data were analyzed in accordance with the Obukhov-Monin equations and with the Monin-Kazanskiy nomogram, i.e., assuming that the roughness and stability parameters given adequately define turbulence. Ground covers (vegetation, snow), degree of cloudiness (clear or overcast), the mean monthly variations in the stability parameter, given mean values m/sec, and the maximum and minimum values of the turbulence coefficient are presented in tables. (Author)

Descriptors :   (*MICROMETEOROLOGY, TURBULENT BOUNDARY LAYER), (*ATMOSPHERIC MOTION, MEASUREMENT), MOUNTAINS, TERRAIN, ATMOSPHERIC TEMPERATURE, AEROSOL GENERATORS, CLOUD COVER, STABILITY, SOILS, TEMPERATURE, USSR

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE