摘要
1991年初夏,持续性大暴雨导致江淮流域特大洪涝灾害.本文分析了降水量与洪涝的分布和演变及其基本大气环流特征,并着重研究了洪涝的主要成因——厄尼诺现象.文中指出.江淮流域的大或特大洪涝,大多发生在厄尼诺事件的同年或次年.厄尼诺、反厄尼诺与北半球低纬100和500hpa大气环流有长达15个月(从同年6月至次年8月)的显著性相关.厄尼诺事件的影响以各种复杂机制,先在低纬作纬向扩展传播.再向中高纬度频散传播.从而对气象与海洋灾害作出严重影响.
In early summer,1991,sustained heavy rains introduced an extremely severe disaster of
flooding-watcrlogging in Yangtze-Huaihe Rivers.The distribution and development of rain-
fall and flooding-waterlogging and its basic atmospheric circulation features are analyzed in
this paper.A special attention is paid to its principal formative cause—El Nino event.It is
pointed out that severe-cxtremely severe flooding-waterlogging in Yangtze-Huaihe Rivers
mainly took place in same year or next year of El Nino event.The El Nino-Anti-El Nino
event has a significant correlation to 100 and 500 hpa circulation in lower latitude of northern
hemisphere as long as 15 months from June of same year to August of next year.By many
kinds of complex mechanism,the impact of El Nino event zonally expands and propagates
first in lower latitude,then disperses and propagates to middle-high latitudes.Therefore,El
Nino event gives a severe impact on oceanic—meteorological disasters.
出处
《自然灾害学报》
CSCD
1992年第1期75-84,共10页
Journal of Natural Disasters
关键词
洪涝
梅雨
厄尼诺现象
El Nino event
Flooding-waterlogging
