生态学杂志2013，Vol.32Issue(3)：733-740,8.
1961-2010年黄土高原地区参考作物蒸散量对气候变化的响应及未来趋势预估
Responses of reference crop evapotranspiration in Loess Plateau of Northwest China to climate change in 1961-2010 and estimation of future trend
摘要
Abstract
It is essential to accurately estimate the reference crop evapotranspiration (ET0) in semiarid areas where the water resources are limited and excessively explored, which would be greatly helpful for planning the irrigation water supply and understanding the effects of climate change on hydrological processes. Based on the 1961 -2010 daily meteorological data from 67 meteorological stations in the Loess Plateau of Northwest China, and by using Penmen-Monteith equation, the reference crop evapotranspiration (ET0) in the Plateau was calculated, and, in combining with the many years' variations of various meteorological factors, the causes of the past years ET0 change in the Plateau were analyzed. On these bases, the future trend of the ET0 was estimated by the rescaled range analysis method. In the study area, the sensitivity of ET0 to mean air temperature was relatively low. However, due to its great variation, the mean air temperature was the dominant factor inducing the ET0 change, with a contribution rate of 6. 37%. Solar radiation and wind speed also had greater contribution rate to the ET0 change. Actual vapor pressure, due to its smaller variation, had minor effects on the ET0, only with a contribution rate of 1.36%. Spatially, air temperature had positive contribution to the ET0 change, wind speed and solar radiation had negative contribution in most regions, whereas actual vapor pressure had positive contribution in northern part and but negative contribution in southern part. Within a definite period in the future, the ET0 would keep the same change trend as the past. This study provided a basis for developing appropriate measures to reduce the losses from drought in the Loess Plateau.关键词
参考作物蒸散(ET0)/Penman-Monteith公式/R/S分析/黄土高原地区Key words
reference crop evapotranspiration (ET0)/ Penman-Monteith equation/ R/S analysis/ Loess Plateau分类
天文与地球科学引用本文复制引用
张勃,张调风..1961-2010年黄土高原地区参考作物蒸散量对气候变化的响应及未来趋势预估[J].生态学杂志,2013,32(3):733-740,8.基金项目
国家自然科学基金项目(40961038)、生态经济学甘肃省级重点学科项目(5001-021)和西北师范大学知识与科技创新工程项目(NWNU-KJCXGC-03-66)资助. （40961038）
