热带气象学报2012，Vol.28Issue(4)：585-593,9.DOI:10.3969/j.issn.1004-4965.2012.04.019
南方地区连续暴雨过程扰动能量的积累和传播分析
ANALYSIS OF THE ACCUMULATION AND PROPAGATION OF WAVE PACKETS DURING A HEAVY RAINFALL PROCESS IN SOUTHERN CHINA
摘要
Abstract
Based on the NCEP/NCAR reanalysis data and a diagnostic analysis of wave packet propagation (WPD), the propagation and accumulation of wave packets during a sustained southern China heavy rainfall process are analyzed. The characteristics of wave-packet propagation at 500 hPa and 700 hPa indicate that most of the area where heavy precipitation took place was in the area controlled by large wave-packet values. Development and accumulation of perturbation energy correspond better to the transport of unstable energy in the strong convergence area. In the background of a powerful southwest monsoon, the perturbation energy of this strong precipitation is mainly from the Bay of Bengal area; wave-packets kept spreading to the area during precipitation; as the western Pacific subtropical high is located more southward than usual, it is favorable to the propagation of perturbation energy by a southwest air current north of it; the perturbation energy of the Tibetan Plateau also influenced the precipitation. The propagation, accumulation and break-up of the perturbation energy have close relationships with the emergence, sustaining and ending of the precipitation.关键词
波包传播诊断/连续暴雨过程/扰动能量Key words
wave-packet propagation (WPD)/heavy rainfall process-, perturbation energy分类
天文与地球科学引用本文复制引用
郭胜利,葛非,马荣,田力,周玲..南方地区连续暴雨过程扰动能量的积累和传播分析[J].热带气象学报,2012,28(4):585-593,9.基金项目
国家重大科学研究计划"973"项目(2012CB955204) （2012CB955204）
江苏省研究生培养创新工程(CXZZ11_0626)共同资助 （CXZZ11_0626）
