水土保持研究2012，Vol.19Issue(1)：70-75,6.
甘肃黄土高原区潜在蒸散量时空变化与成因研究
Study on Temporal and Spatial Changes of the Potential Evapotranspiration and Its Impact Factors in Loess Plateau of Gansu Province
摘要
Abstract
Based on the daily temperature,precipitation,wind speed,sunshine hours,total solar radiation and related humidity date of the 12 meteorological stations of Loess Plateau region in Gansu Province from 1960 to 2008,Potential Evapotranspiration（ET0） were estimated by the methods of Penman—Monteith model in different climate regions and the temporal-spatial variations of ET0 were analyzed by using Kriging interpolation.The results indicated that the trends of ET0 in semi-arid region of the northern Longzhong and the semi-humid region of the southern Longzhong are increasing.In four seasons,summer ET0 was maximum,autumn and spring ones were the second place,winter ET0 was minimum.ET0 had the characteristics of remarkable spatial variations,such as decreasing from north to south,the maximum of ET0 was 1 105.82 mm in Jingtai,while the minimum of ET0 was 772.31 mm in Minxian.Correlation analysis indicated that ET0 was affected by diverse climatic factors in different climate regions of study area.The ET0 of semi-arid region in the northern Longzhong was mainly affected by total solar radiation and sunshine hours,while the ET0 of semi-humid region of the southern Longzhon was mainly controlled by total solar radiation and the highest temperature.ETrad was mainly affected by total solar radiation and the highest temperature.The key factor for influencing the ETaero was the wind speed of all,ETradETaero.In different climatic regions,ETrad change trends of ET0 is increasing,but ETaero are different.The change trends of ET0 of semi-arid region in the northern Longzhong is-0.631 mm/a,it was 0.415 mm/a for the semi-humid region in the southern Longzhong.关键词
气候变化/潜在蒸散量/Penman—Monteith模型/影响因子/黄土高原Key words
climate change/potential evapotranspiration（ET0）/Penman—Monteith model/impact factor/the Loess Plateau分类
农业科技引用本文复制引用
卓玛兰草,刘普幸,张亚宁,王洪岩,曹立国..甘肃黄土高原区潜在蒸散量时空变化与成因研究[J].水土保持研究,2012,19(1):70-75,6.基金项目
国家自然科学基金项目 （）
甘肃省科技计划基金项目 （）
西北师范大学第三期科技创新工程项目 （）
