气候变化领域集成服务门户(CCPortal): Scaling Laws for the Length Scale of Energy-Containing Eddies in a Sheared and Thermally Stratified Atmospheric Surface Layer

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DOI	10.1029/2020GL089997
	Scaling Laws for the Length Scale of Energy-Containing Eddies in a Sheared and Thermally Stratified Atmospheric Surface Layer
	Ayet A.; Katul G.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	In the atmospheric surface layer (ASL), a characteristic wavelength marking the limit between energy-containing and inertial subrange scales can be defined from the vertical velocity spectrum. This wavelength is related to the integral length scale of turbulence, used in turbulence closure approaches for the ASL. The scaling laws describing the displacement of this wavelength with changes in atmospheric stability have eluded theoretical treatment and are considered here. Two derivations are proposed for mildly unstable to mildly stable ASL flows one that only makes use of normalizing constraints on the vertical velocity variance along with idealized spectral shapes featuring production to inertial subrange regimes, while another utilizes a co-spectral budget with a return-to-isotropy closure. The expressions agree with field experiments and permit inference of the variations of the wavelength with atmospheric stability. This methodology offers a new perspective for numerical and theoretical modeling of ASL flows and for experimental design. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Budget control; Turbulence; Velocity; Atmospheric stability; Atmospheric surface layers; Energy-containing eddies; Integral length scale of turbulence; Theoretical modeling; Theoretical treatments; Thermally stratified; Turbulence closures; Atmospheric thermodynamics; atmospheric space; eddy; isotropy; surface layer; turbulence; velocity; wavelength; Trachinotus falcatus
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169323
作者单位	Ifremer, CNRS, IRD, Université de Bretagne Occidentale/Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France; LMD/IPSL, CNRS, École Normale Supérieure, PSL Research University, Paris, France; Nicholas School of the Environment, Duke University, Durham, NC, United States
推荐引用方式 GB/T 7714	Ayet A.,Katul G.G.. Scaling Laws for the Length Scale of Energy-Containing Eddies in a Sheared and Thermally Stratified Atmospheric Surface Layer[J],2020,47(23).
APA	Ayet A.,&Katul G.G..(2020).Scaling Laws for the Length Scale of Energy-Containing Eddies in a Sheared and Thermally Stratified Atmospheric Surface Layer.Geophysical Research Letters,47(23).
MLA	Ayet A.,et al."Scaling Laws for the Length Scale of Energy-Containing Eddies in a Sheared and Thermally Stratified Atmospheric Surface Layer".Geophysical Research Letters 47.23(2020).