气候变化领域集成服务门户(CCPortal): Tidally Forced Lee Waves Drive Turbulent Mixing Along the Arctic Ocean Margins

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DOI	10.1029/2020GL088083
	Tidally Forced Lee Waves Drive Turbulent Mixing Along the Arctic Ocean Margins
	Fer I.; Koenig Z.; Kozlov I.E.; Ostrowski M.; Rippeth T.P.; Padman L.; Bosse A.; Kolås E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	In the Arctic Ocean, limited measurements indicate that the strongest mixing below the atmospherically forced surface mixed layer occurs where tidal currents are strong. However, mechanisms of energy conversion from tides to turbulence and the overall contribution of tidally driven mixing to Arctic Ocean state are poorly understood. We present measurements from the shelf north of Svalbard that show abrupt isopycnal vertical displacements of 10–50 m and intense dissipation associated with cross-isobath diurnal tidal currents of ∼0.15 m s−1. Energy from the barotropic tide accumulated in a trapped baroclinic lee wave during maximum downslope flow and was released around slack water. During a 6-hr turbulent event, high-frequency internal waves were present, the full 300-m depth water column became turbulent, dissipation rates increased by a factor of 100, and turbulent heat flux averaged 15 W m−2 compared with the background rate of 1 W m−2. ©2020. The Authors.
英文关键词	Energy conversion; Heat flux; Mixing; Barotropic tides; Dissipation rates; High frequency HF; Surface mixed layers; Turbulent events; Turbulent heat fluxes; Turbulent mixing; Vertical displacements; Ocean currents; barotropic tide; energy dissipation; heat flux; isopycnal layer; lee wave; mixed layer; tidal cycle; turbulent mixing; water column; Arctic; Arctic Ocean; Svalbard; Svalbard and Jan Mayen
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/169907
作者单位	Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Norwegian Polar Institute, Tromsø, Norway; Marine Hydrophysical Institute of RAS, Sevastopol, Russian Federation; Satellite Oceanography Laboratory, Russian State Hydrometeorological University, Saint Petersburg, Russian Federation; Institute of Marine Research, Bergen, Norway; School of Ocean Sciences, Bangor University, Bangor, United Kingdom; Earth and Space Research, Corvallis, OR, United States; Now at Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM 110, Marseille, France
推荐引用方式 GB/T 7714	Fer I.,Koenig Z.,Kozlov I.E.,et al. Tidally Forced Lee Waves Drive Turbulent Mixing Along the Arctic Ocean Margins[J],2020,47(16).
APA	Fer I..,Koenig Z..,Kozlov I.E..,Ostrowski M..,Rippeth T.P..,...&Kolås E..(2020).Tidally Forced Lee Waves Drive Turbulent Mixing Along the Arctic Ocean Margins.Geophysical Research Letters,47(16).
MLA	Fer I.,et al."Tidally Forced Lee Waves Drive Turbulent Mixing Along the Arctic Ocean Margins".Geophysical Research Letters 47.16(2020).