Mechanisms of formation of the Arabian Sea mini warm pool in a high-resolution Ocean General Circulation Model

摘要: An Ocean General Circulation Model of the Indian with high horizontal (0.25 degrees x 0.25 degrees) and vertical (40 levels) resolutions is used to study dynamics thermodynamics Arabian Sea mini warm pool (ASMWP), warmest region in northern during January-April. The model simulates seasonal cycle temperature, salinity currents as well winter time temperature inversions southeastern (SEAS) quite realistically climatological forcing. experiment which maintained uniform 35 psu over entire domain reproduces ASMWP similar control run realistic this contrary existing theories that stratification caused by intrusion low-salinity water from Bay Bengal into SEAS crucial for formation ASMWP. contribution warming found be negligible. Experiments modified atmospheric forcing show low latent heat loss compared surroundings, resulting winds due orographic effect Western Ghats, plays an important role setting up sea surface (SST) distribution November March. During March-May, responds quickly air-sea fluxes peak SST April-May independent evolution previous months. behaves a wind, heat-dominated regime November-May and, therefore, maintenance not dependent on near stratification.