Impacts of intraseasonal oscillation on the onset and interannual variation of the Indian summer monsoon

被引：25

作者：

Qi YanJun ^{[1
,2
,3
]}

Zhang RenHe ^{[1
]}

Li Tim ^{[4
,5
]}

Wen Min ^{[1
]}

机构：

[1] Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China

[2] Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China

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

[4] Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96816 USA

[5] Univ Hawaii Manoa, Dept Meteorol, Honolulu, HI 96816 USA

来源：

CHINESE SCIENCE BULLETIN | 2009年 / 54卷 / 05期

基金：

中国国家自然科学基金;

关键词：

intraseasonal oscillation (ISO); Indian summer monsoon; interannual variation; CHINA;

D O I：

10.1007/s11434-008-0441-z

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The role of the intraseasonal oscillation (ISO) on the seasonal and interannual variations of the Indian summer monsoon is investigated based on the analysis of observational data. It is shown that the ISO significantly contributes to the establishment of low-level westerlies during the monsoon onset and developing periods. The effect of the ISO on the annual cycle of the monsoon is through nonlinear eddy momentum transport. On the interannual timescale, the Indian summer monsoon rainfall exhibits a significant out-of-phase relationship with the ISO intensity over the Indian monsoon region. In strong ISO years it appears the weak monsoon when there is an abnormal high over the India subcontinent in the lower troposphere. In weak ISO years there exists an abnormal low and the strong monsoon appears.

引用

页码：880 / 884

页数：5

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