SEA SURFACE TEMPERATURE AND SOLAR RADIATION AS THE FACTORS DETERMINING THE DEVELOPMENT OF THE INDIAN SUMMER MONSOON

A. I. Degtyarev

An attempt is made to determine the influence of some diabatic factors (sea surface temperature and incoming solar radiation) on the generation and development of the summer phase of the Asian monsoon. Using the global climate model T21L15 a number of numerical experiments are carried out with anomalous boundary conditions, which made it possible to reveal their importance in the summer monsoon circulation and its enforced intensity in the tropical zone of the Asian region. The simulation of the intraannual variability of monsoon circulation at fixed surface temperature or incoming solar radiation showed that these characteristics qualitatively and quantitatively determine the model reproduction of the summer monsoon circulation. The experiments have found that the setting of the April (May) values of incoming solar radiation is of less importance for the summer monsoon development than the setting of sea surface temperature on a global scale.