The Asian Summer-Monsoon Circulation

[摘要] The authors after a brief review of the winds in tropics, discussed the general circulation over the Asian monsoon region in northern summer. Attention is particularly drawn to the fact that most of the monsoon air comes from the southern hemisphere. This air after ascending into the upper troposphere in the northern tropics, forms the easterly winds and swings back across the equator finally to subside in the southern subtropical ridge. It is specially stressed that if any air subsides north of the equator itself as proposed by Koteswaram, its amount would be very small compared to the total monsoon air. A schematic diagram of the three dimensional flow system in the monsoon area is presented. The period of circulation in the proposed closed cell is evaluated which is found to be approximately equal to the period of the monsoon over India.

[学科分类] 大气科学