长江中游1998年特大洪涝成因分析  

ANALYSIS ON CAUSE OF THE FLOODING OVER THE MIDDLE REACHES OF YANGTZE RIVER IN 1998

作　　者：马福慧[1] 

机构地区：[1]武汉中心气象台,武汉430074

出　　处：《地球物理学报》2000年第3期331-338,共8页Chinese Journal of Geophysics

基　　金：国家九五重中之重科技项目!96-908-05-04

摘　　要：应用 １００ｈＰａ、５００ｈＰａ月平均高度资料、海温、射出长波辐射（ＯＬＲ）及武汉的气温 和降水资料，对１９９８年长江中游特大洪涝的成因作了总结分析．结果表明，冬春厄尔尼诺、副 热带高压和从春到初夏期间，印度洋－西太平洋赤道辐合带（ＩＴＣＺ）南侧积云对流的异常较 强，以及冬季雨雪异常偏多等气候特点，是有利于洪涝发生的强信号．With the data of geopotential height of 100 hPa and 500hPa, sea surface temperature (SST), outgoing long-wave radiation (OLR) and rainfall and temperature din at Wuhan observatory, the causes of flooding over the middle reaches of Yangtze River are analyzed. The results prove that the preceding intensive signs benefiting to flooding appearance are the anomalous strong EL Nino and subtropical high in -winter and spring, the abnormal vigorous cumulus convection in south to the ITCZ over Indian Ocean-West Pacific from spring to early summer and the abundant precipitation in winter.

关 键 词：洪涝成因 厄尔尼诺 气候特征 长江中游 

分 类 号：P426.616[天文地球—大气科学及气象学] P333.2[天文地球—水文科学]