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《Chinese Journal of Geophysics》 2007-01
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Numerical simulation of the impacts of anthropogenic heat on the structure of the urban boundary layer

HE Xiao-Feng~(1,2),JIANG Wei-Mei~1,CHEN Yan~1,LIU Gang~11 Department of Atmospheric Science,Nanjing University,Nanjing 210093,China2 National Climate Center,Beijing 100081,China  
To study the problem about how we can incorporate the anthropogenic heat flux into the model,some cases have been simulated using the Multi-Scale Numerical Modeling System developed by Nanjing University in different cities and different seasons. The simulation results show that the best scheme of including anthropogenic heat flux into the PBL model is to account for the urban canopy heating terms both in the surface energy budget and in the atmospheric heat conservation equation with certain proportions.Results of sensible tests about changing the value of the anthropogenic heat flux show that anthropogenic heat flux plays an important role in urban heat environment.The contribution of anthropogenic heat to UHI is 29.6% with Nanjing anthropogenic heat data in 2002.When heat emission doubling,it reaches 42.9%.The anthropogenic heat emission has impacts on PBL inversion structure during the morning and the intensity of UHI cyclone,and it could result in a 0.5~1.0℃ surface temperature increase at night.
【Fund】: 国家自然科学基金重点项目(40333027)资助
【CateGory Index】: P463
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