摘要
利用小波变换技术 ,对与长江中游地区夏季降水密切相关的赤道东太平洋海温、西太平洋副高、南海夏季风等物理因子进行时间变化的尺度分离 .通过对年代际变化和长期趋势等不同尺度变化的分析 ,揭示出 90年代长江中游异常多雨和频繁洪涝产生的气候变化背景 .
The major characteristics of precipitation over the middle reaches of Changjiang River during summer in the 1990s are analyzed. Using wavelet transform technology, the multiple time scale variations including inter annual, inter decade and long term trends for summer rainfall in main regions over the middle reaches of Changjiang River and its related physical factors such as sea surface temperature in the eastern equator, the western Pacific Subtropic High, and summer monsoon of the South China Sea are analyzed. The results reveal that the extreme summer raininess in 1990s over the middle reaches of Changjiang River has favorable background of climatic variation.
出处
《应用气象学报》
CSCD
北大核心
2001年第1期113-117,共5页
Journal of Applied Meteorological Science
基金
国家"九五"重中之重科技攻关项目! 96-90 8-0 5-0 4资助
