摘要
对2005年"海棠"台风倒槽造成河南特大暴雨过程的湿位涡分析结果表明:倾斜涡度发展是暴雨产生和加强的重要机制之一,暴雨产生在eθ线陡立密集区内,湿位涡在这次暴雨过程中边界层内925hPa具有MPV1>0、MPV2<0的特征,此次暴雨产生在正的MPV1中心附近,有利的地形条件在一定程度上增加了降水量。
Based on the analysis df moist potential vorticity （mpv） for the typhoon ＂Haitang＂ inverted trough which caused rainstorm in Henan province, the results show that slantwise vorticity development is one of the important mechanisms of the rainstorm occurrence and intensification. The rainstorm occurred in the stiff and dense section of moist isentropes. The MPV1 〉 0 and MPV2 〈 0 are characteristics of low - tropospheric mpv in the rainstorm area and the rainstorm occurred in the dense section of the plus e isolines of mpvl. The favorable orographic condition increases precipitation in some degree.
出处
《气象与环境科学》
2007年第4期30-33,共4页
Meteorological and Environmental Sciences
关键词
远距离降水
湿位涡
倾斜涡度发展
“海棠”台风
remote precipitation
moist potential vorticity
slantwise vorticity development
