吴辉碇,白珊,李军,魏禧. 1981. 大气边界层的初值形成[J]. 气象学报, 39(2):129-140, doi:10.11676/qxxb1981.015
大气边界层的初值形成
A SCHEME OF INITIALIZATION FOR THE ATMOSPHERIC BOUNDARY LAYER
投稿时间:1979-07-14  修订日期:1979-11-24
DOI:10.11676/qxxb1981.015
中文关键词:  
英文关键词:
基金项目:
作者单位
吴辉碇 北京大学地球物理系 
白珊 北京大学地球物理系 
李军 北京大学地球物理系 
魏禧 国家海洋局 
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中文摘要:
      采用850毫巴和地面的大尺度天气状况和物理特性作为外参数,将大气边界层下层的地表层进行特殊处理,考虑了层结的作用,其上分成等距15层,考虑地转民随高度线性变化.上下层耦合,建立一个定常平衡初值模型,并将所得的初值作为第一级近似,再利用地面、300、600、900、1500米五个高度测风资料进行动力调整,试图建立一个更加接近实际状态的边界层初值.文中利用所建立的模型,对大气边界层的一些物理参数的作用进行了分析,并对动力调整过程以及垂直分层的选取等作了讨论.最后例举华北地区1966年8月23日08时边界层的各层次风场和垂直运动,清楚地显示出边界层内的细致结构.
英文摘要:
      The large-scale synoptic conditions and the physical properties on the 850mb level and the surface are used as the external parameters.We treat particularly the lower part of the boundary layer in which the effects of the stratification are considered.The higher part,in which it is assumed that the geostrophic winds vary linearly with height,is divided into 15 equal intervals of length.Matching the wind fields of the two parts we set up a steady-balance initial value model.Taking the results obtained above as the guess fields and utilizing the observed wind data on the 1500,900,600,300m levels and the ground,we proceed in dynamic adjustment and try to constitute the initial values of the boundary layer to approximate the actural atmospheric state.In this paper,the effects of some physical parameters in the atmospheric boundary layer are analysed by use of the model constituted above and the choice for the vertical division is discussed.We also describe the adjustment process through integrating numerically boundary layer motion equations.Finally,vertical motion and horizontal wind fields in the boundary layer for the Northern China at pp 002,23 August 1966 are presented as an example.It is evident that these results describe detailed structure of the atmosspheric boundary layer.
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