赵鸣. 1987. 非定常过程对大气边界层的内参数和风廓线的影响[J]. 气象学报, 45(4):385-393, doi:10.11676/qxxb1987.051
非定常过程对大气边界层的内参数和风廓线的影响
THE INFLUENCES OF NONSTATIONARY PROCESS ON THE INNER PARAMETERS AND THE WIND PROFILES IN THE ATMOSPHERIC BOUNDARY LAYER
投稿时间:1985-12-31  修订日期:1986-05-21
DOI:10.11676/qxxb1987.051
中文关键词:  
英文关键词:
基金项目:
作者单位
赵鸣 南京大学大气科学系 
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中文摘要:
      设大气中性、正压,用边界层运动方程的分析解,研究了当大气边界层顶风向随时间作周期变化而风速不变时,对大气边界层的内参数u*/A(A为边界层顶风速)和角φ(地面风与边界层顶的风的夹角)的影响。当风向逆时针转动时,u*/A增加,φ减少,反之亦然。方程的数值解亦得类似结果。因而在定常条件下,得出的大尺度模式中边界层参数化的结果应考虑非定常过程的订正。还分析了非定常过程对边界层风廓线的影响。
英文摘要:
      In this paper,under the assumption of neutral and barotropic atmosphere,by means of the analytic solution of.motion equation PBL,the influences of nonstationary process on the inner parameters u*/A(A is the wind speed at the top of PBL) and φ (the angle between the wind near surface and the wind at the top of PBL) of PBL are investigated in which the direction of the wind at the top of PBL is a periodic function of time but the wind speed at the top of PBL is not changed.The u*/A increases and φ decreases when the wind direction at the top of PBL rotates anticlockwise,and vice versa.Hence the parameterizalion of PBL in the large scale models which was derived in the stationary conditions should be corrected by accounting for the nonstationary process.The similar results are obtained in the numerical solution of the motion equation of PBL.The influences of this nonstationary process on the profiles of wind in PBL are also analyzed.
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