干旱区地理2011，Vol.34Issue(6)：949-957,9.
基于潜在蒸散量对青海湖流域干旱气候以及影响因素的分析
Evaporation and its impact upon drought climate around the Qinghai Lake Basin based on potential Evaporation
摘要
Abstract
This paper valued the potential evaporation around the watershed of Qinghai Lake basin, as well as its neighborhood, and analyzed the spatial distribution, its yearly and monthly variability. Additionally the characteristics of potential evaporation over Qinghai Lake were compared with that over other rivers and lakes in China. At last, the relationship between the drought climate and potential evaporation were explored over Qinghai Lake basin. All the results show that, the potential evaporation over the southern part of Qinghai Lake watershed is the highest value , where there is the arid desert area, while over the eastern part of the watershed, the semi-arid area and agricultural region, the potential evaporation is much lower. As a result, the watershed of Qinghai Lake is the important transitional area from high-evaporation arid climate area to semi-arid moisture area, which is a significant barrier for ecology environment over northwest China. During the past 37 years, the potential evaporation over the Qinghai Lake displayed a decreasing trend, which is similar with either calculated or pan-observed evaporations in the upper reaches of the Yellow River. At the same time, the decreasing trend of potential evaporation is similar with other rivers and lakes over China. But the evaporation did not increased as the scientists had estimated, because they think that with the increasing temperature the evaporation should have increased. It is not the same with the northwestern and southeastern part of Qinghai Province, where the evaporation has increased significantly. In one word the evaporation was not only influenced by temperature and rainfall markedly, but also influenced by a lot of other meteorology factors. There would be a mass if you want to get the result that the evaporation will get up just Iiased on the increasing temperature. The decreasing trend of evaporation and increasing precipitation over Qinghai Lake basin, are all the factors that weaken the arid climate of Qinghai Lake during the past presently years.关键词
青海湖流域/潜在蒸散量/气候/降水量/干旱Key words
the Qinghai Lake Basin/ potential evaporation/ temperature/ rainfall/ drought分类
天文与地球科学引用本文复制引用
白爱娟,假拉,徐维新..基于潜在蒸散量对青海湖流域干旱气候以及影响因素的分析[J].干旱区地理,2011,34(6):949-957,9.基金项目
国家自然科学基金面上项目 (40975020) （40975020）
“十一五”国家科技支撑计划项目(2007BAC30B05-4) （2007BAC30B05-4）
干旱气象科学研究基金项目(IAM200812) （IAM200812）
成都信息工程学院科研项目(KYTZ200914)共同资助 （KYTZ200914）
