全球气候变化下西安地区的响应  

Global climate change response of Xi'an area

作　　者：万红莲[1,2] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]宝鸡文理学院灾害监测与机理模拟陕西省重点实验室,宝鸡721013

出　　处：《干旱区资源与环境》2011年第1期102-106,共5页Journal of Arid Land Resources and Environment

基　　金：国家自然基金项目(40771018);陕西省教育厅自然科学研究计划项目(09JK330)资助

摘　　要：利用西安市56a的气温、降水量资料对其气候变化特征进行分析。得出:西安市56a来气温呈波动上升趋势,年平均气温的增温倾向率为0.296℃/10a,大于同期全国年平均增温率(0.04℃/10a)。从季节来看,冬季增温明显,特别是20世纪90年代以后是出现异常冬暖年的主要时期;西安市56a来降水量以6.752mm/10a趋势下降,年降水量平均减少0.6752mm,低于全国年平均递减量1.269mm,但冬季降水量有增加趋势;对降水量、气温进行相关分析,发现年总降水量与年平均气温以及春季、夏季、秋季降水量与气温均呈负相关。冬季降水量与气温呈正相关。二者之间均表现出显著线性相关,且通过了a=0.01显著性水平检验;与关中其它两个城市相比,1961a来西安的温度增幅是最大的,降水量的减幅是最小的;近期西安、宝鸡、渭南均有向暖干化发展的趋势。Based on the observed data of precipitation,temperature from 1951 to 2005 in Xi＇an,the climate change characteristics were analyzed. The results showed that the temperature of Xi＇an had an increasing trend with fluctuation,especially in winter. The decadal mean annual temperature in Xi＇an was increased by 0. 296℃ / 10a,more than the same period in the national annual average rate of warming by 0. 04℃ /10a. Temperature increasing mainly took place after 1990; The decadal annual precipitation was reduced by 6. 752 mm,lower than the national average annual amount decreasing 1. 269 mm. However,winter precipitation showed an upward trend; The test with SPSS software revealed that mean annual precipitation and mean annual as well as the spring, summer,autumn rainfall and temperature were negatively correlated. Winter precipitation and temperature was positively correlated. Between the two showed a significant linear correlation,and the adoption of a = 0. 01 level of significance test; Compared with other 2 cities like Baoji,Weinan in the Guanzhong,Xi＇an experienced largest increase in temperature,precipitation reduction was the smallest; Xi＇an,Baoji,Weinan will have a warming and drying trend in recent years.

关 键 词：气候变化 气温 降水量 西安市 

分 类 号：P467[天文地球—大气科学及气象学]