大气科学2011，Vol.35Issue(3)：422-434,13.
夏季青藏高原大气热源与西南地区东部旱涝的关系
Contemporaneous Relationships between Summer Atmospheric Heat Source over the Tibetan Plateau and Drought/Flood in Eastern Southwest China
摘要
Abstract
Based on the NCEP/NCAR reanalysis monthly data and daily precipitation data at 20 stations in eastern Southwest China from 1959 to 2006, the features of atmospheric heat source over the Tibetan Plateau and the key area associated with the drought/flood in summer over eastern Southwest China have been analyzed. Results show that there is a close relationship between the flood/drought over eastern Southwest China and the intensity of the atmospheric heat source over southeastern Tibetan Plateau (key area), i. e., the rainfall is more than normal while the heat source is stronger. It is propitious to appearance of circulation making for the summer rainfall in eastern Southwest China; furthermore, the vapor transport and convergent upward velocity are strengthened, the East Asian summer monsoon is weaker, and the ridge positions of the western Pacific subtropical high and South Asia high lean to south when the intensity of the atmospheric heat source over eastern Tibetan Plateau (key area) is stronger than normal, vice versa.关键词
西南地区东部/夏季旱涝/高原热源/影响Key words
eastern Southwest China/ drought/flood in summer/ atmospheric heat source over the Tibetan Plateau/ effect分类
天文与地球科学引用本文复制引用
李永华,卢楚翰,徐海明,程炳岩,王勇..夏季青藏高原大气热源与西南地区东部旱涝的关系[J].大气科学,2011,35(3):422-434,13.基金项目
国家自然科学基金资助项目40975058,重庆市自然科学基金计划重点项目CSTC2008BA0022,公益性行业(气象)科研专项GYHY201006054 （气象）
