干旱区地理2013，Vol.36Issue(3)：433-440,8.
沙漠腹地人工绿地地表能量交换特征
Characteristics of surface energy exchange in the artificial shelter forest land of the hinterland of Taklimakan Desert
摘要
Abstract
In order to reveal the energy exchange characters of artificial irrigated shelter forest land near the ground surface in the hinterland of the Taklimakan Desert.The research applied the Eddy Covariance Method to measure sensible heat and latent heat flux on a typical clear day in growing reason.The results showed as follows:(1)Sensible heat flux is a larger proportion of energy and latent heat flux accounts for a small proportion in the desert and artificial sheher forest land.However the latent heat flux in artificial shelter forest land is more than that in desert because of the surface albedo,soil moisture and land cover change after afforesting the shelter-forests.Compared with the desert,the heat flux and latent heat flux peak increase accordingly in artificial irrigated shelter forest land,the peak of latent heat and sensible heat flux are 230.54 W/m2 and 88.5 W/m2 in artificial shelter forest land,thus the desert area is 220 W/m2 and 17.55 W/m2,the surface energy exchange characteristics in the hinterland of the Taklimakan Desert is similar with other arid areas in northwest China.(2)Average Bowen value is 1.63 in artificial irrigated shelter forest land whereas 10.82 in desert on a typical clear day.After afforesting,average Bowen value and Bowen diurnal range is significantly reduced,only occupied 15％ of the desert area,the Bowen in artificial irrigated shelter forest land is similar with oasis in the Northwest China.This proves that microclimate had prompted.(3)Meteorological factors and underlying surface influence surface energy exchange in artificial irrigated shelter forest land.The correlation analysis showed that the order of fitness degree between latent heat and sensible heat flux and single environment factor was:net radiation ＞ variety of air temperature ＞ variety of soil temperature ＞ wind velocity ＞ soil temperature.The surface energy exchange is closely related to several environmental factors.The result will show the characteristics of surface energy exchange of irrigated afforestation in the desert hinterland.关键词
涡度相关/感热/潜热/人工造林/塔克拉玛干沙漠腹地Key words
eddy covariance/ latent heat flux/ sensible heat flux/ afforestation/ hinterland of Taklimakan Desert分类
天文与地球科学引用本文复制引用
严坤,李生宇,雷加强,王海峰,孙聪,严风硕,李春..沙漠腹地人工绿地地表能量交换特征[J].干旱区地理,2013,36(3):433-440,8.基金项目
国家自然科学基金重点项目(41030530) （41030530）
公益性行业(气象)科研专项(GYHY201106025) （气象）
