THE NUMERICAL EXPERIMENTS ON APPLICATING GEOSTROPHIC MOMENTUM APPROXIMATION TO THE BAROCLINIC AND NON-NEUTRAL PBL

Zhao Ming

doi:10.1007/BF02656753

Impact Factor: 5.8

Volume 5 Issue 3

Jul. 1988

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1988 > 5(3): 287-300

THE NUMERICAL EXPERIMENTS ON APPLICATING GEOSTROPHIC MOMENTUM APPROXIMATION TO THE BAROCLINIC AND NON-NEUTRAL PBL

Zhao Ming

1.
Department of Atmospheric Sciences, Nanjing University, Nanjing

Zhao Ming

doi: 10.1007/BF02656753

Abstract
References
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Abstract:
In this paper, Wu and Blumen’s boundary layer geostrophic momentum approximation model (Wu and Blumen, 1982) is applied to baroclinic and non-neutral PBL, the motion equations for the PBL under the geostrophic momentum approximation are solved, in which the eddy transfer coefficient is a function of the distributions of the wind and temperature. The results are compared with those in barotropic and neutral conditions with the geostrophic momentum approximation. It is found that in the baroclinic condition, the wind distribution has both the characteristics of a steady, homogeneous and baroclinic PBL and those caused by the geostrophic momentum approximation. Those in non-neutral conditions show that they retain the intrinsic characteristics for the wind in non-neutral PBL, at the same time, the effects of the large-scale advection and local variation are also included. We can predict the wind in the non-neutral and baroclinic PBL by use of the geostrophic mo-mentum approximation when the temporal and spatial distributions of the geostrophic wind, as well as the po-tential temperatures and their variation rates at the upper and lower boundary of the PBL are given by large-scale model. Finally, the model is extended to the case over sea surface.
References

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Manuscript History

Manuscript received: 10 July 1988

Manuscript revised: 10 July 1988

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

THE NUMERICAL EXPERIMENTS ON APPLICATING GEOSTROPHIC MOMENTUM APPROXIMATION TO THE BAROCLINIC AND NON-NEUTRAL PBL

Zhao Ming

1. Department of Atmospheric Sciences, Nanjing University, Nanjing

Manuscript received: 1988-07-10
Manuscript revised: 1988-07-10

Abstract: In this paper, Wu and Blumen’s boundary layer geostrophic momentum approximation model (Wu and Blumen, 1982) is applied to baroclinic and non-neutral PBL, the motion equations for the PBL under the geostrophic momentum approximation are solved, in which the eddy transfer coefficient is a function of the distributions of the wind and temperature. The results are compared with those in barotropic and neutral conditions with the geostrophic momentum approximation. It is found that in the baroclinic condition, the wind distribution has both the characteristics of a steady, homogeneous and baroclinic PBL and those caused by the geostrophic momentum approximation. Those in non-neutral conditions show that they retain the intrinsic characteristics for the wind in non-neutral PBL, at the same time, the effects of the large-scale advection and local variation are also included. We can predict the wind in the non-neutral and baroclinic PBL by use of the geostrophic mo-mentum approximation when the temporal and spatial distributions of the geostrophic wind, as well as the po-tential temperatures and their variation rates at the upper and lower boundary of the PBL are given by large-scale model. Finally, the model is extended to the case over sea surface.