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›› 2013, Vol. 36 ›› Issue (3): 433-440.

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Characteristics of surface energy exchange in the artificial shelter forest land of the hinterland of Taklimakan Desert

YAN  Kun1，2，LI  Sheng-yu1，LEI  Jia-qiang1，WANG  Hai-feng1，SUN  Cong3，YAN  Feng-shuo4，LI  Chun   

  1. （1   Xinjiang  Institute  of  Ecology  and  Geography, Chinese  Academy  of  Science, Urumqi  830011, Xinjiang, China;   2   Institute  of  Mountain  Hazards and  Environment, Chinese  Academy  of  Sciences, Chengdu  610041, Sichuan, China;   3   China  National  Environmental  Monitoring  Centre, Beijing  100012, China;   4   The  Second  Research  Institute  of  CAAC, Chengdu  610041, Sichuan, China; 5   Hydrochina  Chengdu  Engineering  Corporation, Chengdu  610072, Sichuan, China）
  • Received:2012-08-23 Revised:2012-10-05 Online:2013-05-25

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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 shelter 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.

Key words: eddy covariance； , latent heat flux； , sensible heat flux； , afforestation； , hinterland of Taklimakan Desert

CLC Number: 

  • P422.4