近半个世纪以来祁连山区气温与降水变化的时空特征分析  

Variation characteristics of air temperature and precipitation in Mt.Qilian region in recent half century

作　　者：张耀宗[1] 张勃[1] 刘艳艳[1] 姜晓勇[1] 张永芳[1] 

机构地区：[1]西北师范大学地理与环境科学学院,兰州730070

出　　处：《干旱区资源与环境》2009年第4期125-130,共6页Journal of Arid Land Resources and Environment

基　　金：甘肃省自然科学基金项目(2007GS03634);生态经济省级重点学科;西北师范大学学生学术基金项目资助

摘　　要：利用祁连山区19个气象站1960-2005年月平均气温、月平均最高、最低气温、月降水资料,采用线性趋势分析、滑动平均、累积距平等对祁连山近46年的降水、气温变化的时空分布特征进行了分析。结果表明:(1)1960-2005年祁连山区的气温呈显著的上升趋势,最低气温的升幅要高于平均气温和最高气温;(2)祁连山区的气温变化和西北地区的气温变化有很好的同步性,祁连山区西段的气温变化要比东段和中段更加显著;(3)祁连山区的降水呈明显的上升趋势,但是区域差异性很明显,西段增加最为显著,从1978年开始显著增加,要早于西北其他地区。南坡的降水增加要比北坡显著。Using annual mean, maximum, minimum air temperature and monthly mean precipitation data from 19 weather stations in Mt. Qilian region from 1960 to 2005, applying linear trend, moving mean and accumulated variance analysis methods to analyze the spatial and temporal distribution characters of the change of the air temperature and precipitation during the recent 46 years in Mt. Qilian region . The main findings can be summarized as follows ： （ 1 ） There is an obvious increase trend of the air temperature in Mt. Qilian region 1960 to 2005, the extend of increase of the minimum air temperature is higher than mean, maximum air temperature. （ 2 ） The change of air temperature in Mt. Qilian region have a good synchronization with the change of air temperature in Northwest of China, the change of air temperature is more significant in west section than in middle and east section of Mt. Qilian region. （3） There is an obvious increase trend of the precipitation in Mt. Qilian region, however there is an obvious difference among different area, increase trend of the west part is the most significant, starting obvious ascending from 1978 ,which is earlier than other region of Northwest of China. The increase trend of the precipitation in south slope is more significant than in north slope.

关 键 词：祁连山区 降水 气温 

分 类 号：P468.024[天文地球—大气科学及气象学]