气候变化领域集成服务门户(CCPortal): Observed Variability of the North Atlantic Current in the Rockall Trough From 4 Years of Mooring Measurements

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DOI	10.1029/2020JC016403
	Observed Variability of the North Atlantic Current in the Rockall Trough From 4 Years of Mooring Measurements
	Houpert L.; Cunningham S.; Fraser N.; Johnson C.; Holliday N.P.; Jones S.; Moat B.; Rayner D.
发表日期	2020
ISSN	21699275
卷号	125 期号:10
英文摘要	The Rockall Trough is one of the main conduits for warm Atlantic Water to the Nordic Seas. Ocean heat anomalies, originating from the eastern subpolar gyre, are known to influence Arctic sea ice extent, marine ecosystems, and continental climate. Knowledge of the transport through this basin has previously been limited to estimates from hydrographic sections which cannot characterize the intra-annual and multiannual variability. As part of the Overturning in the Subpolar North Atlantic Programme (OSNAP), a mooring array was deployed in the Rockall Trough in order to obtain the first continuous measurements of transport. Here, we define the methodology and the errors associated with estimating these transports. Results show a 4-year mean northward transport of 6.6 Sv (1 Sv = 106 m3/s) by the North Atlantic Current (NAC) in the east and interior of the Rockall Trough (2014–2018). A mean transport of −2.0 Sv (southward) is observed in the west of the basin, which could be part of a recirculation around the Rockall Plateau. The 90-day low-pass-filtered transport shows large subannual and interannual variability (−1.6 to 9.1 Sv), mostly resulting from changes in the midbasin geostrophic transport. Satellite altimetry reveals the periods of low and high transport are associated with significant changes in the Rockall Trough circulation. There is a detectable seasonal signal, with the greatest transport in spring and autumn. ©2020. The Authors.
英文关键词	AMOC; Gulf Stream; mooring; North Atlantic Current; ocean observations; transport
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/186616
作者单位	National Oceanography Centre, Southampton, United Kingdom; Scottish Association for Marine Science, Oban, United Kingdom
推荐引用方式 GB/T 7714	Houpert L.,Cunningham S.,Fraser N.,et al. Observed Variability of the North Atlantic Current in the Rockall Trough From 4 Years of Mooring Measurements[J],2020,125(10).
APA	Houpert L..,Cunningham S..,Fraser N..,Johnson C..,Holliday N.P..,...&Rayner D..(2020).Observed Variability of the North Atlantic Current in the Rockall Trough From 4 Years of Mooring Measurements.Journal of Geophysical Research: Oceans,125(10).
MLA	Houpert L.,et al."Observed Variability of the North Atlantic Current in the Rockall Trough From 4 Years of Mooring Measurements".Journal of Geophysical Research: Oceans 125.10(2020).