有切变对流边界层夹卷厚度参数化的大涡模拟研究 *

南京大学学报(自然科学版) ›› 2010, Vol. 46 ›› Issue (6): 616–624.

有切变对流边界层夹卷厚度参数化的大涡模拟研究 *

林恒 1 , 孙鉴泞 1 ** , 卢伟 2

出版日期:2015-04-07 发布日期:2015-04-07
作者简介: (1. 南京大学大气科学学院, 南京, 210093; 2. 解放军理工大学气象学院, 南京, 211101)
基金资助:
国家自然科学基金( 40975004)

Parameterization of the entrainment zone depth above the sheared convective boundary layer derived from large-eddy simulations

Lin H eng 1 , Sun Jian Ning 1 , Lu Wei 2

Online:2015-04-07 Published:2015-04-07
About author: ( 1. School of Atmospheric Sciences, Nanjing University, Nanjing, 210093, China;
2. Institute of M eteorology, Peoples? Liberty Army University of Science and Technology,
Nanjing, 211101, China)

摘要/Abstract

摘要： 运用大涡模拟研究有切变对流边界层顶部夹卷过程, 并着重探讨了夹卷层厚度的参数化问题. 结果表明, 切变湍流对夹卷过程确有贡献, 其作用应该被考虑在夹卷层厚度的参数化方案中. 基于对
现有两种参数化方案的验证与分析, 本文提出了改进方案, 新方案可以描述正压和斜压条件下的夹卷层厚度特征, 而这两种条件下夹卷过程的不同特性可以通过在参数化方案中取不同的常数得到体现.

Abstract: Large- eddy simulations are employed to investigate the entrainment process at the top of sheared convective boundary layer. The focused problem is how to parameterize the entrainment zone depth. Two previous
parameterization schemes are evaluated by the data from large -eddy simulations, and a new scheme is suggested based on the analyses. The new scheme can describe the behaviours of entrainment zone depth under both barotropic
and baroclinic conditions, while the different characteristics of the two kinds of entrainment can be embodied by using different coefficients.

林恒 1 , 孙鉴泞 1 ** , 卢伟 2
. 有切变对流边界层夹卷厚度参数化的大涡模拟研究 *
[J]. 南京大学学报(自然科学版), 2010, 46(6): 616–624.

Lin H eng 1 , Sun Jian Ning 1 , Lu Wei 2
. Parameterization of the entrainment zone depth above the sheared convective boundary layer derived from large-eddy simulations
[J]. Journal of Nanjing University(Natural Sciences), 2010, 46(6): 616–624.

参考文献

[ 1 ] Hoxit L R. Planetary boundary layer winds in baroclinic conditions. Journal of Atmospheric Science, 1974, 31: 1003~ 1020.
[ 2 ] Arya S P S, Wyngaard J C. Effect of baroclinicity on wind profiles and the geostrophic drag law for the convective planetary boundary layer. Journal of Atmospheric Science, 1975, 32: 767~ 778.
[ 3 ] LeMone M A, Zhou M, Moeng C H, et al. An observational study of wind profiles in the ba roclinic convective mixed layer. Boundary-Layer Meteorology, 1999, 90: 47~ 82.
[ 4 ] Kim S W, Park S U, Moeng C H. Entrainment processes in the convective boundary layer with varying wind shear. Boundary-Layer M eteorology, 2003, 108: 221~ 245.
[ 5 ] Kim S W, Park S U, Pino D, et al. Parameterization of entrainment in a sheared convective boundary layer using a first?order jump model. Boundary -Layer Meteorology, 2006, 120: 445~ 475.
[ 6 ] Pino D, Vil-Guerau de Arellano J, Duynkerke P G. The contribution of shear to the evolution of a convective boundary layer. Journal of Atmospheric Science, 2003, 60: 1913~ 1926.
[ 7 ] Pino D, Vil-Guerau de Arellano J, Kim S W. Representing sheared convective boundary layer by zero and first-order-jump mixed-layer models: Large -eddy simulation verification. Journal of Applied Meteorology and Climatology, 2006, 45: 1224~ 1243.
[ 8 ] Conzemius R J, Fedorovich E. Dynamics of sheared convective boundary layer entrainment, Part I: Methodological background and large eddy simulations. Journal of Atomspheric Science, 2006, 63: 1151~ 1178.
[ 9 ] Conzemius R J, Fedorovich E. Dynamics of sheared convective boundary layer entrainment, Part II: Evaluation of bulk model prediction of entrainment flux. Journal of Atmospheric Science, 2006, 63: 1179~ 1199.
[ 10] Conzemius R J, Fedorovich E. Bulk models of the sheared convective boundary layer: Evalua tion through large -eddy simulations Journal of Atmospheric Science, 2007, 64: 786~ 807.
[ 11] Lilly D K. Models of cloud?topped mixed layers under a strong inversion. Quarterly Journal of Royal M eteorological Society, 1968, 94: 292~ 309.
[ 12] Betts A K. Reply to comment on the paper Non-precipitation cumulus convection and its parameterization. ! Quarterly Journal of Royal M eteorological Society, 1974, 100: 467~ 471.
[ 13] Sorbjan Z. Numerical study of penetrative and solid lid! non penetrative convective boundary layer. Journal of Atmospheric Science, 1996, 53: 101~ 112.
[ 14] Lewellen D C, Lewellen W S. Large eddy boundary layer entrainment. Journal of Atmospheric Science, 1998, 55: 2645~ 2665
[ 15] Sullivan P P, Moeng C H, Stevens B, et al. Structure of the entrainment zone capping the convective atmospheric boundary layer. Journal of Atmospheric Science, 1998, 55: 3042~ 3064.
[ 16] VanZanten M C, Duynkerke P G, Cuijpers J W M. Entrainment parameterization in convective boundary layers derived from large eddy simulations. Journal of Atmospheric Science, 1999, 56: 813~ 828.
[ 17] Otte M J, Wyngarrd J C. Stably stratified interfacial-layer turbulence from large-eddy simulation. Journal of Atmospheric Science, 2001, 58: 3424~ 3442.
[ 18] Deardorff J W. Three dimensional numerical study of the height and the mean structure of a heated planetary boundary layer. Boundary-Layer Meteorology, 1974, 7: 199~ 226.
[ 19] Moeng C H. A large-eddy simulation model for the study of planetary boundary-layer turbulence. Journal of Atmospheric Science, 1984, 41: 2052~ 2062.
[ 20] Xu Q J, Sun J N, Liu G, et al. On the definition and parameterization of the entrainment zon depth at the top of convective boundary layer.
Journal of Nanjing University ( Natural Sciences), 2008, 44: 219~ 226. ( 徐强君, 孙鉴泞, 刘罡等. 夹卷层厚度定义对其参数化的影响. 南京大学学报 ( 自然科学) , 2008, 44: 219~ 226).
[ 21] Wyngaard J C, Brost R A. Top -down and bottom-up diffusion of a scalar in the convective boundary layer. Journal of Atmospheric Science, 1984, 41: 102~ 112.
[ 22] Stull R B. An introduction to boundary layer meteorology. New York: Kluwer Academic Publisher, 1988, 476.

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