Accession Number:

AD0258406

Title:

THE INFLUENCE OF THE CENTRAL ASIATIC MOUNTAIN MASSIF ON THE FORMATION OF JET STREAMS

Descriptive Note:

Corporate Author:

AMERICAN METEOROLOGICAL SOCIETY BOSTON MASS

Personal Author(s):

Report Date:

1961-03-01

Pagination or Media Count:

1.0

Abstract:

A study is made of the influence of mountain ridges, primarily the Central Asiatic mountain massif, on the formation, change of intensity and seasonal position of tropospheric jet streams. The Himalayas and Tibet are considered to exert an essential influence on atmospheric circulation aloft, and at the same time, on the jet streams. In regards to the effect of this mountain massif on atmospheric circulation in the lower half of the troposphere and on the weather in China and northern India, it is shown that Tibet and the Himalayas are active mainly during the cold part of the year and exert almost no influence during the warm season. This is due to the fact that by summer the upper frontal zone and the jet stream converge to the north beyond the limits of this highland. According to these concepts, the western air current the jet stream bifurcates during the cold half-year when it encounters the mountain massif. As a result of the mechanical effect of the mountains, there are, two jet streams, north and south of the mountains. The northern branch of the jet stream is more mobile than the southern, since the movement of the southern branch is restricted by the Himalayas. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE