气候变化领域集成服务门户(CCPortal): An Evaluation of the Constant Flux Layer in the Atmospheric Flow Above the Wavy Air-Sea Interface

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DOI	10.1029/2020JD032834
	An Evaluation of the Constant Flux Layer in the Atmospheric Flow Above the Wavy Air-Sea Interface
	Ortiz-Suslow D.G.; Kalogiros J.; Yamaguchi R.; Wang Q.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	The constant flux layer assumption simplifies the problem of atmospheric surface layer (ASL) dynamics and is an underlying assumption of Monin-Obukhov similarity theory (MOST), which is ubiquitously applied to model interfacial exchange and atmospheric turbulence. Within the marine environment, the measurements necessary to confirm the local ASL as a constant flux layer are rarely available, namely: direct observations of the near-surface flux gradients. Recently, the Research Platform FLIP was deployed with a meteorological mast that resolved the momentum and heat flux gradients from 3 to 16 m above the ocean surface. Here, we present an assessment of the prevalence of the constant flux layer within the ASL, using an approach that accounted for the role of wave-coherent motion in air and evaluated each observed flux gradien. Our analysis revealed that only 30%–40% of momentum flux gradients were approximately constant; for the heat fluxes, this increased to 50%–60%. For low winds, the stationarity of local turbulence was critical to the constant flux layer's validity, but resulted in excising a large proportion of the observed profiles. Under moderate wind speeds, swell-wind alignment was associated with momentum flux divergence. Our findings suggest that the constant flux layer, as it is conventionally defined, is not generally valid over the ocean. This holds significant implications for measuring air-sea fluxes from single point sources and marine applications of MOST. © 2021. The Authors. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	air-sea fluxes; boundary layer turbulence; eddy covariance; marine meteorology; micrometeorology; surface gravity waves
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/185280
作者单位	Department of Meteorology, Naval Postgraduate School, Monterey, CA, United States; National Observatory of Athens, Athens, Greece
推荐引用方式 GB/T 7714	Ortiz-Suslow D.G.,Kalogiros J.,Yamaguchi R.,et al. An Evaluation of the Constant Flux Layer in the Atmospheric Flow Above the Wavy Air-Sea Interface[J],2021,126(8).
APA	Ortiz-Suslow D.G.,Kalogiros J.,Yamaguchi R.,&Wang Q..(2021).An Evaluation of the Constant Flux Layer in the Atmospheric Flow Above the Wavy Air-Sea Interface.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Ortiz-Suslow D.G.,et al."An Evaluation of the Constant Flux Layer in the Atmospheric Flow Above the Wavy Air-Sea Interface".Journal of Geophysical Research: Atmospheres 126.8(2021).