Studies of the Indian summer monsoon with a coarse-mesh general circulation model, part II

✍ Scribed by Druyan, Leonard M.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1982
• Weight: 594 KB
• Volume: 2
• Category: Article
• ISSN: 2314-6214
• DOI: 10.1002/joc.3370020405

✦ Synopsis

Abstract

A previous paper (Part I) discussed the performance of a coarse‐mesh general circulation model in studies of the Indian summer monsoon. Part II herein describes impacts on the simulated monsoon climate due to prescribed changes in the lower boundary conditions: lowering and flattening of the Himalayan Mountains and cold and warm sea‐surface temperature (SST) anomalies in the Arabian Sea. Results indicate that it is the Himalayas that are responsible for the observed north‐westerly flow aloft over northern India before onset and the delay in precipitation onset there until late June or July. SST anomalies, which are held constant throughout four‐month simulations, affect local precipitation computations via changes in stability and cause impacts of the opposite sign immediately downwind. Neither of the two anomalies tested resulted in statistically significant precipitation impacts over India.