On some aspects of Indian Ocean Warm Pool

摘要

Annual and interannual variation of Indian Ocean Warm Pool (IOWP) was studied using satellite and in situ ocean temperature data. IOWP surface area undergoes a strong annual cycle attaining a maximum of 24 x 10(6)km(2) during April and minimum of 10 x 10(6)km(2) in August. Unlike surface area, warm pool was deeper (90m) during August than in April. Higher vertical extent was found both at eastern equatorial Indian Ocean and south-eastern Arabian Sea. Frequency distribution of temperatures at one degree interval (28-29, 29-30, 30-31) exhibited independent seasonal variations. The interannual variation of IOWP was found to be associated with ENSO events.