近50年来祁连山区气候变化特征研究  

Characteristics of Climate Change in Qilian Mountains Region in Recent 50 Years

作　　者：尹宪志[1,2] 张强[1] 徐启运[2] 薛万孝 郭慧[2] 史志娟[2] 

机构地区：[1]中国气象局兰州干旱气象研究所/甘肃省干旱气候变化与减灾重点实验室/中国气象局干旱气候变化与减灾重点开放实验室,甘肃兰州730020 [2]甘肃省气象局,甘肃兰州730020 [3]甘肃省气象信息中心,甘肃兰州730020

出　　处：《高原气象》2009年第1期85-90,共6页Plateau Meteorology

基　　金：“西部开发科技行动”重大项目“祁连山空中云水资源开发利用研究”(2004BA901A16);2008年公益性行业(气象)科研专项“西北地区旱作农业对气候变暖的响应特征及其预警和应对技术研究(GYHY200806021)共同资助”

摘　　要：根据祁连山区海拔2800 m以上的5个气象站点的气温及降水资料,分析了近50年的气候变化。研究表明,50年来祁连山区年平均气温呈上升趋势,突变出现在1980年代中期,1980年代中期以前增温缓慢,以后增温明显加快。冬季变暖的趋势远大于夏季,夜间升温幅度远大于白天,祁连山区气温以东西两段增温幅度最大;祁连山区降水量呈增加趋势,少雨年在1960年代和1970年代,多雨年在近20年,春季和夏季有明显上升趋势,祁连山西段降水量增加幅度明显。Based on the observational air temperature and precipitation data at 5 meteorological stations in Qilian mountains region over 2800 m above sea level, the characteristic of climate change in recent 50 years are discussed. Annual mean air temperature of Qilian mountains region was on the rise during the recent 50 years, its abrupt change occured in middle of 1980s, while air temperature rose slowly before it and rapidly after it. Temperature rising rate of winter was higher than that of summer, meanwhile that of night was higher than that of daytime. And it was the highest in east and weast regions of Qilian mountains region. Simultaneously, the precipitation totally presented an increasing tendency in Qilian mountains region. There were drought years in 1960s and 1970s. The more rain years are mostly in recent 20 years. Precipitation in spring and summer, and in west region of Qilian mountains region showed a marked increasing tendency.

关 键 词：祁连山 气候变化 降水量 

分 类 号：P467[天文地球—大气科学及气象学]