IMPACTS OF PERSISTENTLY STRONG ASIAN WINTER MONSOON ON EQUATORIAL SEA SURFACE TEMPERATURE ANOMALY AS SIMULATED IN CLIMATE MODEL

By comparing the out puts from control and sensitivity experiment of the LASG/IAP GOALS climate system model,the impacts of anom alous strong Asian winter monsoon on the initiation of the equator sea surface temperature (SST) anomaly in the Pacific Ocean are studied.It is shown that the strong Siberian cold bursts during winter notonly forms huge surface anticyclone over the Eurasian Continent,but also generates anom alous cyclone circulation over the western and northw estern Pacific and anti-cyclone circulation over the southeastern Pacific.The latter is shown to be a result of air-sea interaction over the Northern Pacific.It causes westerly wind anomaly,rise of sea level and increase of (SST) along the western equat orial Pacific and easterly wind anomaly and decrease in both sea level and SST along the equatorial eastern Indian and Pacific oceans.It is also shown that SST anomaly is the integral of SST tendency.Asstrong signals,the aforementioned SST chang es along the equator forced by strong w int er m onsoon can be retained in ocean as SST anomaly for more than half a year.This then provides initial conditions for the development of possible ENSO events along the equator,as well as precursors for inter-seasonal climate prediction.