气候变化领域集成服务门户(CCPortal): On the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean

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DOI	10.1029/2020JC016375
	On the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean
	Schulz K.; Janout M.; Lenn Y.-D.; Ruiz-Castillo E.; Polyakov I.; Mohrholz V.; Tippenhauer S.; Reeve K.A.; Hölemann J.; Rabe B.; Vredenborg M.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	This study presents recent observations to quantify oceanic heat fluxes along the continental slope of the Eurasian part of the Arctic Ocean, in order to understand the dominant processes leading to the observed along-track heat loss of the Arctic Boundary Current (ABC). We investigate the fate of warm Atlantic Water (AW) along the Arctic Ocean continental margin of the Siberian Seas based on 11 cross-slope conductivity, temperature, depth transects and direct heat flux estimates from microstructure profiles obtained in summer 2018. The ABC loses on average (Formula presented.) (108) J m−2 per 100 km during its propagation along the Siberian shelves, corresponding to an average heat flux of 47 W m−2 out of the AW layer. The measured vertical heat flux on the upper AW interface of on average 10 W m−2 in the deep basin, and 3.7 W m−2 above the continental slope is larger than previously reported values. Still, these heat fluxes explain less than 20% of the observed heat loss within the boundary current. Heat fluxes are significantly increased in the turbulent near-bottom layer, where AW intersects the continental slope, and at the lee side of a topographic irregularity. This indicates that mixing with ambient colder water along the continental margins is an important contribution to AW heat loss. Furthermore, the cold halocline layer receives approximately the same amount of heat due to upward mixing from the AW, compared to heat input from the summer-warmed surface layer above. This underlines the importance of both surface warming and increased vertical mixing in a future ice-free Arctic Ocean in summer. © 2020. The Authors.
英文关键词	Arctic Boundary Current; Arctic Ocean; heat flux; Laptev Sea; mixing; turbulence
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186499
作者单位	Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany; School of Ocean Sciences, Bangor University, Menai Bridge, United Kingdom; International Arctic Research Center, College of Natural Science and Mathematics, University of Alaska Fairbanks, Fairbanks, United States; Leibniz Institute for Baltic Sea Research, Rostock, Germany
推荐引用方式 GB/T 7714	Schulz K.,Janout M.,Lenn Y.-D.,et al. On the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean[J],2021,126(2).
APA	Schulz K..,Janout M..,Lenn Y.-D..,Ruiz-Castillo E..,Polyakov I..,...&Vredenborg M..(2021).On the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean.Journal of Geophysical Research: Oceans,126(2).
MLA	Schulz K.,et al."On the Along-Slope Heat Loss of the Boundary Current in the Eastern Arctic Ocean".Journal of Geophysical Research: Oceans 126.2(2021).