Impacts of high-resolution urban canopy parameters within the WRF model on dynamical and thermal fields over Guangzhou, China

2019 
AbstractIn urban scale, the detailed characteristics of land-use information and building properties are vital to improve the meteorological model. The WRF model with high-spatial resolution urban fraction (UF) and urban morphology (UM) is used to study the impacts of these urban canopy parameters (UCPs) on dynamical and thermal meteorological fields in two representative seasons in Guangzhou. The results of two seasons are similar and as follows: 1) The impacts of updated UF and UM are obvious on wind speed, but minor on temperature and humidity. In the urban, the results with updated UF and UM are more consistent with observations compared with the default UCPs, which means the performance of the model has been improved. 2) The dynamical factors associated with wind speed are analyzed. Turbulence kinetic energy (TKE) is significantly affected by UM but little by UF. And both UF and UM are found to influence friction velocity (U*). The UM and greater UF attained larger U*. 3) In addition, the thermal fie...
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