气象科学2017，Vol.37Issue(3)：329-338,10.DOI:10.3969/2016jms.0044
东亚冬夏季风关系在1970s末的年代际转变
The decadal change of relationship between East Asian winter monsoon and East Asian summer monsoon in late 1970s
摘要
Abstract
In terms of NCEP/NCAR reanalysis data,HadISST1 dataset and several representative monsoon indices,the interdecadal variation of the relationship between ENSO-related EAWM and the fol lowing East Asian summer monsoon (EASM) was investigated by the methods of regression and movingcorrelation.Moreover,the reasons of the variation were also analyzed.Results show that the negative relationship is weak during 1965-1979,but became strong and statistically significant during 1980-2004.A strong ENSO-related EAWM led to negative geopotential height anomalies in middle-level and lower-level anomalous cyclonic circulation over the western North Pacific,which persisted from winter to summer and weakened the strength of West Pacific Subtropical High (WPSH) in summer during 1980-2004.Corre sponding to the lower-level anomalous cyclonic circulation,the southwesterly of EASM was blocked by north wind in eastern China.Whereas the circulation anomalies of the above-mentioned quantities were weak during 1965-1979.The differences of sea surface temperature distribution in spring and summer between two periods of time are possible reasons for the changes in relationship and circulation.关键词
东亚冬季风/东亚夏季风/相关关系/年代际变化Key words
East Asian winter monsoon/East Asian summer monsoon/Correlationship/Decadal variability分类
天文与地球科学引用本文复制引用
李明聪,李栋梁..东亚冬夏季风关系在1970s末的年代际转变[J].气象科学,2017,37(3):329-338,10.基金项目
国家重点基础研究发展计划(973)项目(2013CB430202) （973）
国家自然科学基金资助项目(91337109) （91337109）
江苏高校优势学科建设工程项目(PAPD) （PAPD）
