气候变化领域集成服务门户(CCPortal): Intensification of Near-Surface Currents and Shear in the Eastern Arctic Ocean

CCPortal

DOI	10.1029/2020GL089469
	Intensification of Near-Surface Currents and Shear in the Eastern Arctic Ocean
	Polyakov I.V.; Rippeth T.P.; Fer I.; Baumann T.M.; Carmack E.C.; Ivanov V.V.; Janout M.; Padman L.; Pnyushkov A.V.; Rember R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	A 15-year (2004–2018) record of mooring observations from the upper 50 m ocean in the eastern Eurasian Basin reveals increased current speeds and shear, associated with an increasing coupling between wind, ice, and oceanic currents and their vertical shear over 2004–2018, particularly in summer. Substantial increases in both current speeds and shears in the upper 50 m are dominated by a two times amplification of currents in the semidiurnal band, which includes tides and wind-forced near-inertial oscillations. For the first time the strengthened upper ocean currents and shear are observed to coincide with weakening stratification. This coupling links the Atlantic Water heat to the sea ice, a consequence of which would be reducing regional sea ice volume. These results point to a new positive feedback mechanism in which reduced sea ice extent facilitates more energetic inertial oscillations and associated upper-ocean shear, thus leading in enhanced ventilation of the Atlantic water. ©2020. The Authors.
英文关键词	Banks (bodies of water); Mooring; Ocean currents; Sea ice; Coupling links; Eastern Arctic; Feedback mechanisms; Inertial oscillation; Near-inertial oscillations; Near-surface currents; Upper ocean currents; Vertical shear; Shear flow; amplification; feedback mechanism; mooring system; oceanic current; oscillation; semidiurnal tide; shear; stratification; upper ocean; Arctic Ocean; Atlantic Ocean; Eurasian Basin
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/169937
作者单位	International Arctic Research Center and College of Natural Science and Mathematics, University of Alaska Fairbanks, Fairbanks, AK, United States; Finnish Meteorological Institute, Helsinki, Finland; School of Ocean Sciences, Bangor University, Menai Bridge, United Kingdom; Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway; Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC, Canada; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, AK, United States; Geography Department, Lomonosov Moscow State University, Moscow, Russian Federation; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany; Earth and Space Research, Corvallis, OR, United States
推荐引用方式 GB/T 7714	Polyakov I.V.,Rippeth T.P.,Fer I.,et al. Intensification of Near-Surface Currents and Shear in the Eastern Arctic Ocean[J],2020,47(16).
APA	Polyakov I.V..,Rippeth T.P..,Fer I..,Baumann T.M..,Carmack E.C..,...&Rember R..(2020).Intensification of Near-Surface Currents and Shear in the Eastern Arctic Ocean.Geophysical Research Letters,47(16).
MLA	Polyakov I.V.,et al."Intensification of Near-Surface Currents and Shear in the Eastern Arctic Ocean".Geophysical Research Letters 47.16(2020).