HONG Yingying, LIU Yiming, ZHANG Shuting, et al. Numerical Simulation of the Urbanization Impact on Atmospheric Boundary Layer Characteristics over the Pearl River Delta, China[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2015,54(1):116-123.
HONG Yingying, LIU Yiming, ZHANG Shuting, et al. Numerical Simulation of the Urbanization Impact on Atmospheric Boundary Layer Characteristics over the Pearl River Delta, China[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 2015,54(1):116-123.DOI:
WRF/UCM model was used to simulate the meteorological characteristics of an air pollution episode over the Pearl River Delta (PRD) in autumn
2008. In order to study the impact of urbanization on atmospheric boundary layer characteristics
this article set up sensitivity experiments by changing the surface landuse type and the anthropogenic heat flux. The results showed that urbanization
including the increase of urban area
anthropogenic heat and the increase of its flux
helped to strengthen the effect of urban heat island and urban dry island
and the surface temperature inversion turned to be more obvious
which resulted in the accumulation of surface pollutants. Urbanization not only decreased the wind speed due to the increase of surface roughness
but also strengthened the heat island circulation
which was adverse to the diffusion of pollutants and caused the pollution episodes in urban areas. Moreover
the urbanization could raise the atmospheric boundary layer height both in daytime and nighttime.
关键词
城市化土地利用类型人为热大气边界层
Keywords
urbanizationland use typeanthropogenic heatatmospheric boundary layer