气象科学2017，Vol.37Issue(4)：497-504,8.DOI:10.3969/2016jms.0042
长江中下游夏季极端降水指数的变化特征
Analysis on the variation of extreme precipitation indices in the mid-lower Yangtze River valley of China
摘要
Abstract
Based on the daily precipitation data of 66 meteorological stations over the middle and lower reaches of the Yangtze River,the Empirical Orthogonal Function (EOF) decomposition was used to analyze the extreme precipitation index of the moderate or above rain days and its formation reasons.Results show that the moderate or above rainy days over middle and lower reaches of the Yangtze River can be classified into the same anomaly pattern in the whole area and the reverse anomaly pattern in the south and north,but the both present interannual and interdecadal variation of the quasi-biennial period.The moderate or above days began to rise significantly in 1990s,and since 2000s,the north area of the Yangtze River exceeded the south;during 2000-2011,there still was "anticyclonic-cyclonic" anomaly of water vapor transportation in the meridional direction in the East China,and the anticyclonic water vapor transportation in Mongolia plateau was strengthened enough to cause the rain belt to stagnate in the north of the Yangtze River,and made the moderate or above rainy days in the south of the Yangtze River relatively less.关键词
极端降水指数/长江中下游/变化特征Key words
Extreme precipitation index/The mid-lower reaches of Changjiang river/Variation characteristics分类
天文与地球科学引用本文复制引用
陈迪,闵锦忠..长江中下游夏季极端降水指数的变化特征[J].气象科学,2017,37(4):497-504,8.基金项目
国家自然科学基金资助项目(41475045) （41475045）
