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Development of An Integrated PBL-and-Land Model to Simulate Air Temperature
|關鍵字:||氣溫;air temperature;蒸散;蒸散;地表參數化;氣動阻尼;area heat capacity;evapotranspiration;land surface parameterization;aerodynamic resistance;canopy resistance||出版社:||環境工程學系||摘要:||
Surface air temperature is a very important meteorological factor that concerns many people. This study develops a PBL-and-Land model to determine air temperature without using a prescribed climatic temperature. Case studies on Metropolitan Taipei and City Hualian indicate that the correlation coefficients between calculated air temperature and observation are as high as 0.96 with standard errors less than 1.5C in the period of simulation from 1994 to 1996. Several parameters in the land surface model are decided by calibration and are verified to apply to Taiwan area. Simulation results indicate that the design of a scheme to accommodate the effect of evaporation from skin reservoirs is necessary to decide the air temperature immediately following rain, and the design of a scheme to account for transpiration from vegetated areas is necessary to determine the mean temperature of an urban area. Air temperature and other physical properties including skin temperature, mixing layer height, latent heat, etc. are obtained from model simulation. In the advantage of efficient calculation, the physical mechanism and scheme in this model can be applied to air quality model. This model can also be used to investigate the heat island effect.
|Appears in Collections:||環境工程學系所|
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