华北盛夏降水年代际变化与南半球环流异常的关系

Anomaly Patterns of Southern Hemispheric Atmospheric Circulation Associated with Interdecadal Variability of Summer Precipitation in North China

利用NCEP/NCAR再分析资料和中国160个台站降水资料,分析了华北盛夏降水与南半球马斯克林高压、澳大利亚高压的年际关系。结果表明,华北盛夏降水和马高、澳高在年际变化尺度上都有着显著的负相关关系,且这种关系存在年代际变化,并重点分析了与华北盛夏降水年代际变化相对应的南半球环流异常型的特征。

Based on the NCEP/NCAR reanalysis data and the monthly rainfall of 160 stations in China,the interannual correlation of summer（July-August） rainfall（JAR） of North China with the Mascarene high（MH）,Australian high（AH） are analyzed.The results show that the interannual variability of the JAR was close negatively correlated with the MH index and AH index;the interannual correlation also displayed interdecadal variations.The Southern Hemispheric circulation anomaly features associated with the decadal variability of the JAR of North China are also pointed.