气候变化领域集成服务门户(CCPortal): Gray Zone Partitioning Functions and Parameterization of Turbulence Fluxes in the Convective Atmospheric Boundary Layer

CCPortal

DOI	10.1029/2020JD033581
	Gray Zone Partitioning Functions and Parameterization of Turbulence Fluxes in the Convective Atmospheric Boundary Layer
	Senel C.B.; Temel O.; Muñoz-Esparza D.; Parente A.; van Beeck J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:22
英文摘要	Here, we present the first attempt to fully represent three-dimensional turbulence fluxes in the “Terra Incognita” or the gray zone in other words. In order to derive partitioning functions, representing the partitioning between subgrid and total fluxes, we make use of high-resolution large-eddy simulations (LES), which are performed with the Weather Research and Forecasting (WRF) model. LES computations are performed for various levels of convective instability, ranging from pure buoyant to strongly sheared convection. Then, the resulting reference-LES fields are successively coarse grained from its original microscale grid spacing ((Formula presented.) m) up to typical mesoscale grid spacings ((Formula presented.) km). The given process is applied by means of an advanced filter, that is, the Butterworth filter. It enables a clear scale-specific filtering that results in a more controlled energy transition from lower to higher wavenumbers, unlike the drawbacks of current filters in use. Finally, we parameterize the subgrid scale (SGS) partitioning functions of 10 SGS turbulence quantities: momentum fluxes (τij, six terms), heat fluxes (qj, three terms), and turbulence kinetic energy (k). Turbulence partitioning relations are parameterized in a scale-aware, stability-dependent, and height-dependent form, using the sigmoidal Gompertz function. Thus, the new gray zone model provides a framework that bridges the mesoscale and microscale limits and that is suitable for the development of next generation three-dimensional, multiscale turbulence parameterization methods or planetary boundary layer schemes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric boundary layer; gray zone; terra incognita; turbulence
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185627
作者单位	Environmental and Applied Fluid Dynamics Department, von Karman Institute for Fluid Dynamics, Sint-Genesius-Rode, Belgium; Aero-Thermo-Mechanics Department, Université Libre de Bruxelles, Brussels, Belgium; Institute of Astronomy, KU Leuven, Leuven, Belgium; Reference Systems and Planetology Department, Royal Observatory of Belgium, Brussels, Belgium; National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Senel C.B.,Temel O.,Muñoz-Esparza D.,et al. Gray Zone Partitioning Functions and Parameterization of Turbulence Fluxes in the Convective Atmospheric Boundary Layer[J],2020,125(22).
APA	Senel C.B.,Temel O.,Muñoz-Esparza D.,Parente A.,&van Beeck J..(2020).Gray Zone Partitioning Functions and Parameterization of Turbulence Fluxes in the Convective Atmospheric Boundary Layer.Journal of Geophysical Research: Atmospheres,125(22).
MLA	Senel C.B.,et al."Gray Zone Partitioning Functions and Parameterization of Turbulence Fluxes in the Convective Atmospheric Boundary Layer".Journal of Geophysical Research: Atmospheres 125.22(2020).