Abstract:
The effect of the SSTA(Sea Surface Temperature Anomaly) of the tropical Pacific,Indian and Atlantic Oceans on the western end of the ridge of the subtropical high of Atlantic is discussed by spectrum analysis,and the optimum time-lags and the key sector of the three oceans corresponding to them are found,wich is regarded as the strong signal of west-moving or east-moving of the western end of the ridge.The western end of the ridge of the subtropical high of Atlantic can be regarded as an index of East-Asian monsoons,which have great influence on weather and climate of Yunnan Province in the low latitude plateau.