ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Effect Simulation of Chengdu Fine Underlying Surface Information on Urban Meteorology
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Abstract:
In order to improve the level of Chengdu fine weather forecast, using Chengdu fine underlying surface data, the urban meteorological characteristics of Chengdu are simulated by the WRF coupled with singlelayer urban canopy model for a clear day, on July 6, 2008, and those are compared to simulations with old landuse data and slab model. The result shows that because of urban impervious underlying surface area increasing, the surface evaporation and upward moisture flux are significantly reduced, latent heat flux decreases and sensible heat flux increases. Urban buildings can intercept longwave radiation energy, so urban turbulence enhances and boundary layer height becomes higher; With the fine landuse data and singlelayer urban canopy model, both negative bias and rootmeansquare error of 2m temperature decrease; Urban area expansion and more buildings have led to the result that the urban heat island effect strengthens, urban 10m wind speed decreases, heat circulation between urban and suburban areas enhances, and local vertical circulation boosts.
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