摘要
利用统计、Matlab小波分析法,对南澳县1957—2009年的年、月降水量进行分析和计算,结果表明:南澳县年降水主要集中在4—9月份,占全年降水量的80.5%呈现双峰型,6月份是最高峰,8月份为次高峰,分别分布于前、后汛期;多雨期与少雨期交替变化,在少雨年份的转折期都有一年对应的多雨年份;53a来南澳的年降水量、后汛期降水量均有一个28a的准周期变化,前汛期降水量在1959—1994年存在准12a的周期。
According to methods of statistics and Matlab wavelet, this paper analyses annual and monthly precipitation in the years from 1957 to 2009 in Nanao. The results show that: annual precipitation is mainly concentrated in the months from April to September, which accounts for 80.5% precipitation and presents double peak; the highest peak of precipitation is in June and the secondary peak is in August, which is distributed before and after the flood season; the rain period and less rain period are alternated; during less rain period, there is always corresponding rain period; for over 53 years, the average annual precipitation and precipitation after the flood season have the same quasi-28-year-periodic cycle, meanwhile the precipitation before the flood season has the quasi-12-year cycle in the years from 1959 to 1994.
出处
《气象水文海洋仪器》
2010年第4期44-46,共3页
Meteorological,Hydrological and Marine Instruments
关键词
气候学
降水
变化特征
小波分析
南澳
climatology
precipitation
variation characteristics
wavelet analysis
Nanao