Accession Number : AD0675885

Title :   DISTRIBUTION OF ATMOSPHERIC PRESSURE AT SEA LEVEL IN THE LAKE BAIKAL AREA,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Krotova,V. A. ; Lut,L. I.

Report Date : 28 MAR 1968

Pagination or Media Count : 35

Abstract : The distribution of the average long-term atmospheric pressure over Lake Baikal, and the territory of eastern Siberia and northern Mongolia contiguous thereto, is reviewed. Use was made of average long-term pressure values from 217 stations located between 50 and 60 degrees north latitude and 90 to 120 degrees east longitude. The methods used to analyze the data are discussed, and the results charted. It was determined that there are local seasonal baric formations of thermal origin over Lake Baikal resulting from the lake's heating action on the contiguous air layer in the winter, and cooling effect in summer, that the heating effect is the result of the slow increase in atmospheric pressure between October and December, and that the cooling effect is due to the two month duration of the warm baric season as compared with the surrounding land. The amplitude of the seasonal changes in pressure over the lake is reduced, and the atmospheric pressure regime over Lake Baikal is definitely different from the continental one. The durations of the cold (October to February) and warm (April to August) baric seasons over the lake are equal, and are five months long. The transition from winter to summer takes place on the lake in March, two months earlier than on the surrounding mainland.

Descriptors :   (*BAROMETRIC PRESSURE, DISTRIBUTION), CLIMATE, LAKES, COOLING, PERIODIC VARIATIONS, WEATHER STATIONS, THERMAL RADIATION, MEASUREMENT, SIBERIA, USSR

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE