THE RELATIONSHIP BETWEEN SEA LEVEL ANOMALY OVER THE TROPICAL SOUTHWESTERN PACIFIC AND SPRING RAIN IN THE SOUTHERN CHINA
WU Qiong
WANG Xiao-chun
HU Ya-jun
LIU Yi-min
Abstract：With the development of technology in oceanographic observation,new types of data are applied to the research on atmosphere and ocean.Sea level anomaly(SLA) observations from satellites can represent the oceanic dynamic and thermodynamic conditions,which are crucial to the influence of ocean on the atmosphere.In this paper,we used SLA data,derived from merged muti-satellite along track observations,to analyze the Southem China Spring Precipitation (SCSP).The results reveal that the SCSP in March and April is well correlated with the meridional position of the Subtropical High ridge (SHR) since the moisture transport in the northwestern part of the Subtropical High is crucial for the SCSP.On the interannual time scale,SCSP is negatively correlated with the SHR significantly,but positively with southwest wind (Vsw) over the southeast of Tibetan Plateau (105～115 °E,20～25 °N).Using the Outgoing Longwave Radiation (OLR) data we found that the SLA of Southwest Pacific (150 °E～170 °W,10～5 °S) can affect the OLR and the latent heat release east of the Philippine Sea,and when the SLA anomaly in the southwestern Pacific is positive,the Subtropical High tends to be located northward,the Vsw becomes weak,and the SCSP tends to be reduced.
Keywords：sea level anomalySouthwest PacificSubtropical Highsouthwesterly jetSouthern China Spring Precipitation
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 231-240 )