Comparison between WRF calculations and observations of wind direction, wind velocity, and temperature

(Part 1) Influence physics models on WRF calculation results

Abstract

The authors intend to use WRF in order to prepare standard wind data at high-altitude for assessment of pedestrian wind environment. Moreover, it is going to extract the vertical profile of the typical wind velocity at the time of a summer weak wind required for the CFD analysis of air pollution, or temperature from the calculation result of WRF. In WRF, although many physical models are prepared, the sensitivity of the result depended on the difference in a model is not fully clear. Then, while each physics model investigated the influence which it has on the calculation result of WRF, comparison with observations was performed. At an altitude of 70m, some differences were seen in a calculated value and other CASE that changed only the atmosphere boundary layer process, but the difference was not almost seen at the CASE interval as altitude rose. In addition, most influences which each physical model has on the calculation result of WRF were not seen.