Accession Number : AD0600525

Title :   ON THE QUESTION OF THE DAILY VARIATION OF CLOUDINESS IN THE SOVIET UNION.

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Kondrau,O. D.

Report Date : 28 APR 1964

Pagination or Media Count : 15

Abstract : The greatest changes in cloudiness (in its daily variation) are observed in the hours closest to sunrise and sunset. In connection with this, consideration of the synoptic observation data in those periods which are close to 0700, and 1900 mean solar time is most important. The greatest amplitude of the daily variation of cloudiness must be expected in the mountains of Central Asia. For example, at the Tien Shan station in July the mean daily amplitude of the probability of clear and overcast skies for the lower clouds was about 50%. On the basis of the data examined in the work on the daily variation in the mean cloudiness and the probability of clear or overcast skies for isolated points, it is possible to conclude that with existing methods of visual observations, 12 observation periods by mean solar time are sufficient for complete climatological characterization of cloudiness in the territory of the USSR. (Author)

Descriptors :   (*CLOUD COVER, DIURNAL VARIATIONS), ATMOSPHERIC MOTION, HEAT TRANSFER, MOISTURE, MEASUREMENT, CLIMATE, METEOROLOGY, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE