春夏东亚大气环流年代际转折的影响及其可能机理

被引：7

作者：

朱志伟

何金海

钟珊珊

尚可

机构：

[1] 南京信息工程大学气象灾害省部共建教育部重点实验室大气科学学院

来源：

气象学报 | 2013年 / 71卷 / 03期

关键词：

年代际转折; 东亚环流主模态; 中国南方降水;

D O I：

暂无

中图分类号：

P434 [大气环流];

学科分类号：

0706 ; 070601 ;

摘要：

通过多变量联合经验正交函数分解(MV-EOF)方法揭示了近30年(1979-2010年)春季和夏季东亚大气环流所发生的年代际转折及其与中国南方降水年代际季节反相变化的内在联系,探讨了局地性大气热源年代际变化影响东亚大气环流年代际转折的可能机理。结果表明:(1)东亚大气环流春季第1模态和夏季第2模态在20世纪90年代中期都发生了明显的年代际转折;(2)与春季大气环流第1模态和夏季大气环流第2模态年代际转折相对应的是中国南方降水明显的年代际季节反相变化,即春季降水年代际减少,夏季降水年代际增多;(3)春季青藏高原和夏季贝加尔湖地区大气热源年代际变化对东亚大气环流年代际转折有一定贡献,是造成中国南方降水年代际季节反相变化的直接原因;(4)春季青藏高原大气热源的年代际减弱,使高原东南侧的西南风减弱,导致中国南方上空水汽输送不足,春季降水减少。夏季贝加尔湖大气热源偶极型分布由"南负北正"转变为"南正北负",由此在贝加尔湖上空激发高压异常,使夏季雨带北进受阻而停滞于南方,造成中国南方夏季降水增多。

引用

页码：440 / 451

页数：12

共 41 条

[11]

Weakening of Interannual Variability in the Summer East Asian Upper-tropospheric Westerly Jet since the Mid-1990s[J]. 陆日宇,叶红,Jong-Ghap JHUN. Advances in Atmospheric Sciences. 2011(06)

[12]

Possible association of the western Tibetan Plateau snow cover with the decadal to interdecadal variations of northern China heatwave frequency. Zhiwei Wu,Zhihong Jiang,Jianping Li,Shanshan Zhong,Lijuan Wang. Climate Dynamics . 2012

[13]

Global temperature change. AJ Hansen,M Sato,R Ruedy. Proceedings of the National Academy of Sciences of the United States of America . 2006

[14]

Interdecadal variation of the summer precipitation in China and its association with decreasing Asian summer monsoon. Part II: Possible causes. Y. H. Ding,Y. Sun,Z. Y. Wang. International Journal of Climatology . 2009

[15]

Multi-Scale Climate Variability of the South China Sea Monsoon:A Review. WANG B,HUANG F,WU Z,ct al. Dyn Atmos Ocean . 2009

[16]

Inter-decadal variation of the summer precipitation in East Chinaand its association with decreasing Asian summer monsoon. Part I:Observed evidences. Ding Y H,Wang Z Y,Sun Y. International Journal of Climatology . 2008

[17]

The NAO, the AO, and global warming: how closely related?. J Cohen,M Barlow. Journal of Climate . 2005

[18]

Interannual and interdecadal variations of the East Asian summer monsoon and tropical Pacific SSTsPart II: Meridional structure of the monsoon. Chang CP, Zhang YS, Li T. Journal of Climatology . 2000

[19]

Trend and variability of China precipitation in spring and summer: linkage to sea‐surface temperatures[J] . FanglinYang,K.‐M.Lau. &nbspInt. J. Climatol. . 2004 (13)

[20]

Impacts of recent El Ni?o Modoki on dry/wet conditions in the Pacific rim during boreal summer[J] . Hengyi Weng,Karumuri Ashok,Swadhin K. Behera,Suryachandra A. Rao,Toshio Yamagata. &nbspClimate Dynamics . 2007 (2)

← 1 2 3 4 5 →