气候变化领域集成服务门户(CCPortal): Numerical Study of Near-Surface Jet in the Atmospheric Surface Layer Over an Oceanic Temperature Front

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DOI	10.1029/2020JD032934
	Numerical Study of Near-Surface Jet in the Atmospheric Surface Layer Over an Oceanic Temperature Front
	Deng B.-Q.; Zhao M.-X.; Wang Q.; Shen L.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	The interaction between atmospheres and oceans plays an important role in the global climate. In a field experiment of atmospheric flows over the Gulf Stream, when the wind blew from the cold water to the warm water, we observed a near-surface jet over the warm water. We then conducted direct numerical simulations and large-eddy simulations of atmospheric turbulence in the vicinity of the front and captured the near-surface jet in simulations for the first time. Analyses of the data obtained from the high-resolution three-dimensional simulations revealed the dominant generation mechanisms of the near-surface jet, which are the strong vertical mixing by the enhanced streamwise rolls and the mean downward motion. Around the near-surface jet, the magnitude of the negatively valued Richardson number significantly increases, indicating the dominance of buoyancy effects in the flow dynamics there. The development of the near-surface jet suggests that the Monin-Obukhov similarity theory (MOST) needs to be modified in representing marine atmospheric boundary layers over sea surface temperature fronts. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric turbulence; direct numerical simulation; large-eddy simulation; near-surface jet; oceanic front
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/185412
作者单位	Department of Mechanical Engineering & St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN, United States; Department of Meteorology, Naval Postgraduate School, Monterey, CA, United States
推荐引用方式 GB/T 7714	Deng B.-Q.,Zhao M.-X.,Wang Q.,et al. Numerical Study of Near-Surface Jet in the Atmospheric Surface Layer Over an Oceanic Temperature Front[J],2021,126(5).
APA	Deng B.-Q.,Zhao M.-X.,Wang Q.,&Shen L..(2021).Numerical Study of Near-Surface Jet in the Atmospheric Surface Layer Over an Oceanic Temperature Front.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Deng B.-Q.,et al."Numerical Study of Near-Surface Jet in the Atmospheric Surface Layer Over an Oceanic Temperature Front".Journal of Geophysical Research: Atmospheres 126.5(2021).