气候变化领域集成服务门户(CCPortal): Year-Round Measurements of the Irminger Current: Variability of a Two-Core Current System Observed in 2014

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DOI	10.1029/2020JC016193
	Year-Round Measurements of the Irminger Current: Variability of a Two-Core Current System Observed in 2014–2016
	de Jong M.F.; de Steur L.; Fried N.; Bol R.; Kritsotalakis S.
发表日期	2020
ISSN	21699275
卷号	125 期号:10
英文摘要	The Irminger Current (IC), flowing northeastward along the western flank of the Reykjanes Ridge, is an important component in the overturning of the North Atlantic subpolar gyre. A 2-year (2014–2016) time series from moored observations shows that the IC consists of two highly variable current cores. A subsampling experiment, using an ocean reanalysis, showed that this current's variability is adequately captured by the array. The two current cores contribute nearly equally to the mean volume transport. The total 2-year mean transport was found to be 10.6 Sv with a standard deviation of daily (monthly) values of 9.2 Sv (4.4 Sv) and a standard error of 1.4 Sv. Mean heat and freshwater transport were 0.21 PW and −22.5 mSv, respectively (Sref = 34.92). The volume transport is strongest in spring, and the average over the first year (8.6 Sv) was lower than that of the second year (12.4 Sv), coinciding with an increase in the density gradient over the array in the second year. The variability of the total transport is dominated by variations in the western core, while the warmer, saltier eastern core contributes more to the heat and (negative) freshwater transport. During the two observed winters, which were marked by exceptional deep convection in the central Irminger Sea, mixed layer deepening down to 400 m depth and outcropping of the 27.7 kg m3 isopycnal were observed within the IC. ©2020. The Authors.
英文关键词	AMOC; convection; Irminger Current; North Atlantic; observations; transport array
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/186640
作者单位	Royal Netherlands Institute for Sea Research and Utrecht University, Texel, Netherlands; Norwegian Polar Institute, Tromsø, Norway; Alfred Wegener Institute, Bremerhaven, Germany
推荐引用方式 GB/T 7714	de Jong M.F.,de Steur L.,Fried N.,等. Year-Round Measurements of the Irminger Current: Variability of a Two-Core Current System Observed in 2014–2016[J],2020,125(10).
APA	de Jong M.F.,de Steur L.,Fried N.,Bol R.,&Kritsotalakis S..(2020).Year-Round Measurements of the Irminger Current: Variability of a Two-Core Current System Observed in 2014–2016.Journal of Geophysical Research: Oceans,125(10).
MLA	de Jong M.F.,et al."Year-Round Measurements of the Irminger Current: Variability of a Two-Core Current System Observed in 2014–2016".Journal of Geophysical Research: Oceans 125.10(2020).