陕西省近年来的降水变化特征  

Precipitation change in the Shaanxi province during the recent years

作　　者：李丽娜[1] 杨联安[1] 

机构地区：[1]西北大学城市与资源学系,陕西西安710127

出　　处：《陕西师范大学学报（自然科学版）》2008年第S1期120-122,共3页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：霍英东教育基金会第九届高等院校青年教师优选资助课题(94005)

摘　　要：利用陕西省1980-2006年的97个气象站的逐月降水资料,分析陕西省1980-2006年均降水量的变化趋势,研究表明:陕西省1980—2006年降水量呈现下降趋势。降水量的线性回归线斜率为-0.5。从季节分析各季降水量的变化情况可以知道:春季降水量年际变化较大,夏季降水量值比较大而降水变化幅度较小,秋季降水量变化不明显,冬季降水量变化则与夏季相反。将陕西省分为陕南、陕北和关中三个区,分析各区的年际降水相对于整个陕西省年降水量的变化。陕南1980—2006年降水量呈现趋势为1983年-1999年陕南地区降水量略高于整个陕西省,其降水量波动与整个陕西省降水量波动情况大体一致;陕北1980—2006年降水量呈现趋势为1980—1989年和1995—1999年陕北地区的降水量变化呈现大幅波动,其他阶段降水量较平稳。By computing percentage anomalies of monthly rainfall data from ninety-seven stations located in the Shaanxi province,precipitation change tendency from 1980 to 2006 is analyzed.The result shows that the annual precipitations reduce during the twenty six years and the linear growth rate is-0.5mm per year.Furthermore,the seasonal precipitation change tendency is analyzed and the conclusion indicates that the inter annual variation of the precipitation in spring is great and the precipitation change in autumn is unobvious.The precipitation variation in summer is great and the precipitation change in winter is opposite to that in summer.Dividing Shaanxi province into Southern Shaanxi,Northern Shaanxi and Guan Zhong regions.Compared to Shaanxi province,the annual precipitation of Southern Shaanxi is slightly during the 1983 to 1999,the fluctuations is in the same general.the annual precipitation change of Northern Shaanxi is significant fluctuation during the 1980 to 1989 and 1995 to 1999,the fluctuations is in the same general,others are relatively stable.

关 键 词：陕西省 降水变化 降水量 

分 类 号：P426.614[天文地球—大气科学及气象学]