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《SCIENTIA ATMOSPHERICA SINICA》 2000-01
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Large-Eddy Simulations of Heat Budget and Advection Effects in Heterogeneous Convective Boundary Layers

Cai Xuhui and Chen Jiayi (State Key Laboratory of Severe Storm Research, State Key Laboratory of Atmospheric Environmental Simulation, Center of Environmental Sciences, Peking University, Beijing 100871)  
Data of large-eddy simulations are used to analyze heat budget and advection effects in convective boundary layers (CBL) which across a surface heat-flux discontinuity along average wind direction Results show that heat conservation equation is well balanced in CBL; besides the surface heat flux term, the advection, horizontally and vertically, also plays a most significant role in heat budget Contribution of advection to heating rate of CBL could achieve that of the net heat-flux difference between two sides of the surface discontinuity Contribution of divergence of average wind field is not negligible to heat budget, while that of turbulent flux divergence is quite small
【Fund】: 国家自然科学基金!49405059 和49790020
【CateGory Index】: P421.3
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