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《Chinese Journal of Atmospheric Sciences》 2008-05
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Footprint Analysis of Turbulent Flux Measurement over Heterogeneous Surface

PENG Guliang1,LIU Shaomin2,CAI Xuhui1,LU Li2,and XU Ziwei21 Department of Environment Science,Peking University,Beijing 1008712 State Key Laboratory of Remote Sensing Science,School of Geography and Remote Sensing Science,Beijing Normal University,Beijing 100875  
To test the applicability of the footprint model over complex surface,heat flux data measured from Beijing Xiao Tang Shan heterogeneous field experiment in May 2005 are used.The data from eddy covariance measurements and Large Aperture Scintillometer(LAS) are processed and analyzed by a footprint model,respectively.Because of heterogeneity,the measurement of eddy covariance method seems to be ambiguous,which contains turbulence information from other land covers.The LAS data have a problem of underestimation due to the blending height and 'source area' effect.After corrected by the footprint method,they are in good agreement.The results demonstrate that the footprint model is an effective and practical tool to solve the heterogeneous problem in the turbulence flux study.
【Fund】: 国家自然科学基金资助项目40675010、40671128;; 国家重点基础研究发展规划项目2002CB410802;; 长江学者和创新团队发展计划IRT0409
【CateGory Index】: P404
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