摘要
本文应用时空综合的经验正交函数分析方法，对１９５１～１９８４年中国１６０个站点的月降水量距平场进行展开，得到了能够反映我国汛期（４～９月）各月降水量距平场时空变化的特征向量场和时间系数。分析结果表明：我国汛期月降水异常存在着几种典型的空间分布型并具有明显的季节变化规律和年际演变特点。
In this paper, by using the joint-space and time EOF method, the monthly mean precipitation anomaly fields of 160 sampling stations in China from the year 1951 to 1984,are expanded. The eigenvectors and time coefficients could indicate not only the distribution features of every monthly mean precipitation anomaly fields but also its variations in time.The results show: there are several canonical anomalous monthly precipitation patterns in flood season(during April to September) as well as the significant annual variation and interannual change.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1995年第2期147-151,共5页
Journal of Lanzhou University(Natural Sciences)
关键词
经验正交函数
时空综合
降水量
降水距平场
empirical orthogonal functions
seasonal variations
annual variations
drought/flood
joint-space and time
