摘要
利用全国160个站1951-2010年近60年的降水资料,对6,7,8月全国的降水进行EOF展开,深入分析了对黑龙江降水及全国雨型变化有影响作用的6月的第4特征向量,7月的第2,3特征向量,8月的第5特征向量。同时分析了特征向量时间系数与黑龙江降水的年际变化特点。计算了黑龙江省与全国同期降水相关系数空间分布。分析表明,6月全国降水大部偏少,主要雨带分布在长江中下游南岸区域;7月黑龙江省多水,我国主雨带分布在长江以北黄、淮河流域;8月黑龙江省多水,在我国盛行两条雨带,即东北雨带和西南雨带。6月、7月、8月相关系数场的分布,基本相似于全国降水主要特征向量空间的结构,特别是我国主要雨带的移动。
Based on precipitation data of 160 meteorological stations in China during 1951 -2012, the empirical orthogonal function （EOF） of precipitation for the whole country was developed. The influence of 4th eigenvector in June, the 2nd and 3rd eigenvectors in July and 5th eigenvector in August on the Heilongjian Province＇ s precipitation and whole country＇s rain-type change was analyzed. At the same time, the time coefficients of eigenvectors and the inter-annual change of the rainfall in Heilongjiang Province were also analyzed. The spatial distribution of correlation coefficient of precipitation between Heilongjiang Province and whole country in the same periods was calculated. The results show that, in June, the precipitation is on the little side in most part of the country and the main rain belt is distributed in the south bank region of middle and lower reaches of the Yangtze River; in July, the Heilongjiang Province has plenty rainfall, and the main rain belt is distributed in the Yellow River Basin and Huaihe River Basin of north of Yangtze River; in August, Heilongjiang Province has abundant precipitation and there are two rain belts, i.e. northeast rain belt and southeast rain belt, in China. The correlation coefficient fields in June, July and August are basically similar to the spatial structure of the main precipitation eigenvectors of the whole country, spatially to the moving of the main rain belt in China.
出处
《自然灾害学报》
CSCD
北大核心
2013年第6期151-160,共10页
Journal of Natural Disasters
基金
国家软科学研究计划项目(2012GXS4B071)
关键词
夏季降水
经验正交函数展开
雨带
相关
summer precipitation
empirical orthogonal function （EOF） expansion
rain belt
correlation
