摘要
1991年江淮梅雨期出现了三次暴雨过程，降水呈现显著的20－25天振荡，该周期明显短于海两期40天振荡的气候周期。分析表明，1991年梅雨降水的低频振荡与乌拉尔阻高、西太平洋副高、东亚与印度季风以及500hPa赤道地区向北传播涡列的20－25天振荡有着密切的关系。
There were three heavy rainfall procedures over the Jianghuai basin in 1991,and the variance of rainfall showed 20 - 25 days oscillation remarkably,which was shorter than 40 days climate peried. The analyses show that there is relation closly between the low frequency oscillation of the Meiyu rainfall in 1991 and the Ural blocking high,and the west Pacific subtropic high,and the east Asia monsson and Indian monsson,and the vortex streets propagation northward of 20-25 days oscillation on 500kPa equator area.
出处
《气象科学》
CSCD
北大核心
1994年第4期354-361,共8页
Journal of the Meteorological Sciences
关键词
暴雨
低频振荡
梅雨期
涡度
Heavy Rainfall, Low Frequency Oscillation
