近50年雅鲁藏布江流域潜在蒸散量的变化特征  

The changes of potential evaportranspiration over Yarlung Zangbo River Basin during 1961-2010

作　　者：杨志刚[1] 唐小萍[1] 路红亚[1] 马鹏飞[1] 洪建昌[1] 

机构地区：[1]西藏自治区气候中心,拉萨850000

出　　处：《地理学报》2013年第9期1263-1268,共6页Acta Geographica Sinica

基　　金：中国气象局气象变化专项(CCSF2011-17)~~

摘　　要：采用1961-2010年雅鲁藏布江流域6个气象站近50年逐日气温、气压等气象资料,利用Penman-Monteith(P-M)模型计算了月、季及年的潜在蒸散量(PE),分析了雅江流域PE变化特征。研究表明:流域平均年、干季和湿季PE呈微弱的增加趋势,增幅均在3.00 mm/10a以下;PE的年代际变化表明20世纪60年代至80年代,年PE有一个增加的过程,而后减少;雅江流域的PE在1981年发生突变。Based on the daily temperature and air pressure datasets recorded by 6 observation stations in the Yarlung Zangbo River Basin during the period 1961-2010, the monthly, seasonal and annual PE （potential evapotranspiration） at this basin was calculated by using Penman-Monteith method, and the changes of PE were analyzed in this paper. The main results were obtained as follows： in terms of annual, wet-seasonal and dry-seasonal variations, there was a weak increasing trend of PE at a rate of less than 3.00 mm/10a. The inter-decadal variation shows that annual PE experienced an increasing process from the 1960s to 1980s, followed by a decreasing trend. The abrupt change of PE was observed in 1981.

关 键 词：雅鲁藏布江流域 潜在蒸发量 变化特征 

分 类 号：P468.02[天文地球—大气科学及气象学]