大气科学2012，Vol.36Issue(4)：784-794,11.DOI:10.3878/j.issn.1006-9895.2012.11173
近几十年青藏高原夏季风变化趋势及其对中国东部降水的影响
Variation of Tibetan Plateau Summer Monsoon and Its Effect on Precipitation in East China
摘要
Abstract
Based on the NCEP/NCAR,NCEP/DOE and ERA40 reanalysis data and the monthly precipitation data from 596 stations of China,the variation of the Tibetan Plateau (TP) summer monsoon and its impact on precipitation in eastern China are investigated by using the correlation analysis,the wavelet analysis,and the cross-spectral analysis.The results show that the plateau summer monsoon exhibits the strong interannual and long-term variability.It also shows an obviously upward trend during 1958-2010.The further analysis reveals that the abnormal enhancement of the plateau summer monsoon changes the Asia atmospheric circulation and then weakens the Asian summer monsoon.This leads to an increase of monsoon rainfall over the middle-lower reaches of the Yangtze River and a decrease over North China and South China.The strengthening of the plateau summer monsoon over the past 50 years may be related to the enhancement of thermal difference between the TP and its surrounding plains in the middle-upper troposphere (especially of the increase of thermal difference between the TP and the plain in eastern China).关键词
高原夏季风/东亚夏季风/南亚夏季风/热力差异Key words
Tibetan Plateau summer monsoon, East Asian summer monsoon, South Asian summer monsoon, thermal difference分类
天文与地球科学引用本文复制引用
华维,范广洲,王炳赟..近几十年青藏高原夏季风变化趋势及其对中国东部降水的影响[J].大气科学,2012,36(4):784-794,11.基金项目
国家重点基础研究发展计划2009CB421406,中挪国际合作项目"Exploring decadal to century scale variability and changes in the East Asian climate during the last Millennium (East Asia DecCen)",国家自然科学基金资助项目40875053,国家科技支撑计划2009BAC51B03,公益性行业(气象)科研专项GYHY201006023,高原大气与环境四川省重点实验室开放课题PAEKL-2010-K1 （East Asia DecCen）
