摘要
利用谐波分析、功率谱分析的方法，对全国730个站点自1951～2000年逐日降水资料进行气候平均分析，研究全国降水季节内振荡的分布特征。研究结果表明，中国大部分地区的降水主要以季节变化为主，而在长江中下游流域主要以季节内振荡为主。气候平均下降水的准双周振荡和Madden and Julian Oscillation（简称MJO）的振幅都在4月份开始加强，在11月份开始减弱，而MJO全年表现都很显著，准双周振荡主要在夏季显著；MJO主要分布在36°N以南的长江巾下游地区，准舣周振荡主要分布在115°E以西的内陆。
The data used in this study are taken from the daily precipitation data at 730 observational stations in China from 1951 to 2000. With harmonic analysis and the power spectral method, the data are used to study the Climatological Intraseasonal Oscillation（CISO） of rainfall and their spatial distribution features. The results indicate that most part of China gives priority to seasonal variation, and the ISO occurs primarily in the midlower reaches of the Yangtze River. The amplitudes of rainfall ISO enhance in April and weaken in November. On the other hand, rainfall MJO is prominent throughout the year, but the Quasi-Two-Week Oscillation is notable only in summer. Rainfall MJO distributes primarily in the mid-lower reaches of the Yangtze River, south of 36°N. The Quasi-Two-Week Oscillation mainly occurs on the mainland west of 115°E.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第2期173-177,共5页
Periodical of Ocean University of China
基金
国家重点基础研究发展计划项目(2006CB403603)
新世纪优秀人才支持计划项目(NCET-05-0591)
中国科学院知识创新工程大气所"联合创新青年学者计划"项目(IAP07308)资助
关键词
中国雨带
空间分布特征
季节内振荡
China rain belts
spatial distribution feature
climatological intraseasonal oscillation
