%0 Journal Article %A HUANG Wenyan %A WU Jianqiu %A WU Jinglu %A CHEN Boli %A LEI Zhengcui %T Comparison of Atmospheric Boundary Layer Simulation by
 Multiple Models over Grassland in Central USA %D 2016 %R 10.11755/j.issn.1006-7639(2016)-04-0710 %J Journal of Arid Meteorology %P 710-717 %V 34 %N 4 %X

Based on the results simulated by four atmospheric models (UM, GEM, LMD and WRF) in DICE and sounding data, the effects of simulation on convective boundary layer in the daytime and stable boundary layer at night over grassland in central USA from 23 to 26 October 1999 were comparatively analyzed. The results showed that the vertical distributions of meteorological elements in the convective boundary layer over grassland in central USA in the daytime from 23 to 26 October 1999 simulated by four atmospheric models were significantly different, which were related with their parameterization schemes. The turbulent mixing was stronger due to entrainment action between the boundary layer and free atmosphere, which resulted in the higher height of mixture layer simulated by UM and LMD models than the observed. However the simulated turbulent mixing by GEM model was weaker, the atmospheric stratification in boundary layer was unstable, and the simulated wind speed generally increased with height, which differed greatly from observation. The simulated effects by WRF were the best in all models, the WRF model could successfully simulate the area of low wind speed and dry layer of water vapour between boundary layer and free atmosphere on 24 October 1999. For the stable boundary layer during the nighttime, there were small simulated differences in all models. The simulated low-level jets by UM and GEM models during the nighttime were weak, while those simulated by WRF and LMD models were close to observation on 24 and 25 October 1999.

%U http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2016)-04-0710