Variation of western Pacific subtropical high and its relationship with the sea surface temperature over equatorial Pacific

Based on the statistical analysis,the western Pacific subtropical high (WPSH) has remarkable interannual and interdecadal variations. The area and the intensity of WPSH have obvious 3-4 a and 11-14 a periods, while the western ridge point has 3-5 a and quasi-13 a periods. The variations of the area of WPSH are similar with the intensity. Both of them have a strong positive correlation with the Sea Surface Temperature (SST) in the central and eastern equatorial Pacific, negative correlation with the variation of the western ridge point. There are significant differences between the variations of SST anomalies at different longitude of the equatorial Pacific and the variations of WPSH. The variations of SST anomalies in the central equatorial Pacific have a close relationship with the variation of WPSH and it is not consanguineous between the SST anomalies in the eastern equatorial Pacific and variations of WPSH. But the variations of SST anomalies in the western Pacific have a negative relationship with the variations of WPSH. So the SST anomalies in the central equatorial Pacific are a key factor for the variations of the WPSH. Based on the close relationship between them, a regression equation is obtained to predict the variations of the intensity and the western ridge point of WPSH in 2013, providing a reference for the flood season precipitation in 2013.