Large-scale Circulation Anomalies Associated with Interannual Variation in Monthly Rainfall over South China from May to August

被引：27

作者：

Su Qin ^{[1
,2
]}

Lu Riyu ^{[1
]}

Li Chaofan ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing 100029, Peoples R China

来源：

ADVANCES IN ATMOSPHERIC SCIENCES | 2014年 / 31卷 / 02期

基金：

中国国家自然科学基金;

关键词：

subseasonal variation; interannual variation; South China; rainfall; general circulation anomalies; SUMMER MONSOON; SEASON; ONSET;

D O I：

10.1007/s00376-013-3051-x

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Interannual variation in summer rainfall over South China (SC) was investigated on the monthly timescale. It was found that monthly rainfall from May to August exhibits different features of variation, and the amounts are basically independent of each other. There is a significant negative correlation, however, between May and July SC rainfall, which is partially related to the developing phases of ENSO events. It was also found that stronger (weaker) lower-tropospheric winds over SC and the upstream parts are responsible for more (less) SC rainfall in every month from May to August. Despite this monthly consistent enhancement of horizontal winds, the wind anomalies exhibit distinct differences between May-June and July-August, due to the remarkable change in climatological winds between these two periods. More SC rainfall is associated with a lower-tropospheric anticyclonic anomaly over the SCS and the Philippine Sea in May and June, but with a cyclonic anomaly centered over SC in July and August.

引用

页码：273 / 282

页数：10

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