Accession Number : AD0674218

Title :   CERTAIN RESULTS OF EXPERIMENTAL INVESTIGATIONS OF THE TURBULENCE OF THE ATMOSPHERE WITH HELP OF RADIOSONDES (CHAPTERS I, II, AND III) (NEKOTORYE REZULTATY EKSPERIMENTALNYKH ISSLEDOVANII TURBULENTNOSTI ATMOSFERY S POMOSHCHYU RADIOZONDOV),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Belyaev,V. P. ; Beltadze,T. G. ; Litovchenko,V. P. ; Litvinova,V. D. ; Lominadze,V. P.

Report Date : 26 JAN 1968

Pagination or Media Count : 68

Abstract : A description is given of methods and equipment for measuring air turbulence over Moscow, Sukhumi (Caucasus), and Tashkent (Kazakhstan). One of the noteworthy features of the method is the synchronization of measurements of air turbulence with such parameters as air temperature, humidity, pressure, wind velocity, and wind direction. Turbulence was measured mostly by balloon-borne radiosondes with an A-22-III accelerometer attached. Sufficient data have been collected (457 radiosonde ascents in 1961-62) to determine a turbulence pattern over the aforementioned localities. Turbulence occurs with the highest frequency in the 1-2 km ground layer, it then decreases reaching a minimum at 6-7 km and then reaches a maximum again at 10-12 km. Data were analyzed to determine other turbulence characteristics depending on location, season, altitude, etc. It was noted that turbulence generally depends on altitude, etc. It was noted that turbulence generally depends on thermal and dynamic stratification in the atmosphere and frequently occurs during pronounced vertical wind and temperature gradients. Two turbulent layers are frequently observed: one above the jet stream and one below it. Turbulence is minimal on the jet stream level. It was also observed that over Moscow and Sukhumi the turbulent layer seldom exceeds 200-400 m and only over Tashkent at 5-7 km is it ever more than 1000 m thick. The experimental work was carried out by the Central Aerological Observatory, Moscow. Also cited are turbulence data for the United States and data collected by E. A. Hyde (1954) for air routes from London to the Far East and back, and London to North Africa. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, *RADIOSONDES), AIR MASS ANALYSIS, WIND, ATMOSPHERES, HUMIDITY, TEMPERATURE, BAROMETRIC PRESSURE, ALTITUDE, PERIODIC VARIATIONS, TROPOSPHERE, METEOROLOGICAL BALLOONS, USSR

Subject Categories : Meteorology
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE