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Numerical Simulation of Features of Surface Boundary-Layer over Beijing Area
HU Xiaoming1), LIU Shuhua1), LIANG Fuming1), WANG Jianhua1), LIU Heping1), LI Ju2), WANG Yingchun2)
(1)Group of Atmospheric Boundary Layer Physics and Environment, Ministry Laboratory of Storm, Drought and flood Damages, Department of Atmospheric Sciences, School of Physics, Peking University, Beijing, 100871; 2)Institute of Urban Meteorology, China Meteorology Administration, Beijing, 100089)
[Abstract]
The non-hydrostatic mesoscale model MM5.V3 is used to simulate the wind field, temperature field etc. of the atmospheric boundary layer over Beijing Area with the mesh resolution of 1km. The simulation results show that the numerical model can successfully simulate the heat island effect and the wind field and temperature field, which are affected by the complicated topography and urban heat island. The results show that: (1) The surface temperature in the central Beijing is 6--8℃ higher than that in the suburbs. (2) Due to the unique topography the wind of Beijing area during the day time is southern anabatic wind and is northern katabatic wind in the night.
[Key Words]
mesoscale model MM5; urban heat island; wind field; temperature field; Beijing area
(Received Date: 2003-12-19 Published Date: 2005-07-20 Vol.41 No.4 pp.514-522) |
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