摘要
利用趋势分析、小波变换等方法，分析了湖北省孝感市1957--2006年近50年降水的多时间尺度变化特征。结果表明：孝感市年降水量呈弱增加趋势，春秋季降水量呈下降趋势，冬夏季降水量呈增加趋势，其中以冬季降水增加趋势最为显著，降水量变化的年代际差异较小，年际差异很大；降水量变化存在明显的多时间尺度特征，其中以3～7a和准11a周期表现显著。
The multiple temporal scale features of precipitation variation in Xiaogan from 1957 to 2006 were analyzed by Morlet wavelet transform and trend analysis, and the related factors of climate change are discussed. The results show that yearly mean precipitation has a weak decline tendency in Xiaogan during recent 50 years, and decline tendencies in spring and fall, while increase tendencies in summer and winter. There is a small variation in the decadal scale and large variation in the annual scale. Precipitation change has obvious multiple temporal scale features with a obvious cyclical scale （3-7 a ＆ quasi-11a）.
出处
《暴雨灾害》
2010年第1期81-84,共4页
Torrential Rain and Disasters
关键词
降水
趋势分析
小波分析
Rainfall
Trend analysis
Wavelet analysis
