The Second Decadal Leading Mode of East Asian Summer Monsoon Rainfall

被引：0

作者：

BAO Qing ^{[1
]}

YU Pei ^{[1
,2
]}

机构：

[1] The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences

[2] University of Chinese Academy of Sciences

来源：

Atmospheric and Oceanic Science Letters | 2014年 / 7卷 / 05期

基金：

美国国家科学基金会;

关键词：

decadal leading mode; East Asian summer monsoon; Tibetan Plateau; Pacific Decadal Oscillation;

D O I：

暂无

中图分类号：

P426.6 [降水];

学科分类号：

0706 ; 070601 ;

摘要：

The first decadal leading mode of East Asian summer rainfall(EASR) is characterized by rainfall anomalies along the East Asian subtropical rain belt. This study focuses on the second decadal leading mode(2DLM), accounting for 17.3% of rainfall decadal variance, as distinct from the other two neighboring modes of EAMR, based on the state-of-the-art in-situ rainfall data.This mode is characterized by a South-China-wet–HuaiheRiver-dry pattern, and is dominated by a quasi-30-yr period. Further analysis reveals the 2DLM corresponds to an enhanced lower-level monsoon jet, an eastward extension of the western North Pacific subtropical high, and a weakened East Asian upper-level westerly jet flow. The Tibetan Plateau surface temperature and Pacific Decadal Oscillation(PDO) are closely linked with the 2DLM. The regressed SST pattern indicates the PDO-like pattern of sea surface temperature anomalies may have a teleconnection relationship with the 2DLM of EASR.

引用

页码：417 / 421

页数：5