摘要
根据陕西省1951—2000年的降水量资料,采用旋转主因子分析方法,对冬季、夏季和年降水量场进行客观分区。陕西省可划分为3个子区域:陕北区、关中陕南西部区和陕南区。在此基础上,研究了陕西省降水量变化的区域特征和年代际变化以及长期趋势特征。结果表明,陕西省过去50年降水量有显著的北少南多特征,而且陕北区降水量的减少趋势远大于关中陕南西部区,陕南区在夏季和冬季降水量还略有增加。
Based on the rainfall data of Shaanxi Province from 1950 to 2000, Using the method of REOF, winter, summer, and yearly precipitation fields can be divided into three subareas, they are the North Shaanxi, Guanzhong and west of South Shaanxi, the South Shaanxi. On the basis of this, the regional feature, the interdecadal change and the long-term trends of precipitation in Shaanxi are analysed. The results show that the rainfall in the past 50 years is scarce in the north, while plenty in the south. The decreasing trend of precipitation in North Shaanxi is more than Guanzhong and west of South Shaanxi, but the rainfall of South Shaanxi in summer and winter have increased slightly.
出处
《高原气象》
CSCD
北大核心
2005年第4期635-641,共7页
Plateau Meteorology
基金
国家重点基础研究发展规划项目(2004CB720208)
科技部基础研究专项(2001CCB00100
2003CCC01500)共同资助
关键词
陕西省
降水量
旋转主因子方法
区域特征
Shaanxi province
Rainfall
Rotated EOF
Regional characteristics
