长江中游地区近年夏季旱涝异常的大气环流差异  

The comparative analysis of atmospheric circulation characteristics of recent summer drought/flood situation over the middle reaches of Changjiang River

作　　者：马乃孚[1] 杨景勋[2] 

机构地区：[1]湖北省气象科学研究所,武汉430074 [2]武汉中心气象台,武汉430074

出　　处：《华中师范大学学报（自然科学版）》2001年第4期470-472,共3页Journal of Central China Normal University：Natural Sciences

基　　金：国家"九五"科技攻关项目 (96-90 8-0 5 -0 4)专题资助

摘　　要：以长江中游夏季 1 998年特大洪涝和 2 0 0 0年异常干旱为实例 ,对 5 0 0 h Pa月平均高度场、极涡、阻塞高压、西太平洋副热带高压强度、面积指数等因子 ,进行同期大气环流特征对比分析 .结果表明 ,1 998年和 2 0 0Taking the middle veaches of Changjiang Rivers the extreme flood year of 1998 and the abnormal drought year of 2000 as an example, this paper makes an analysis the atmospheric circulation character istics of recent summer. The results which takes such aspects into consideration as 500 hPa monthlymean height field, the intensity and area indices of polar vertex, blocking high, subtropical high pressure in the western Pacific ocean, show that the circulation character istics over East Asia from north to south between 1998 and 2000 are auite different.

关 键 词：夏季旱涝 环流差异 长江中游 气象灾害 大气环流特征 高度场 阻塞高压 

分 类 号：P426.616[天文地球—大气科学及气象学] P434