L773:2169 9291
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The Faroe‐Shetland Channel Jet : Structure, Variability, and Driving Mechanisms
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- Chafik, Léon, 1985- (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
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- Nilsson, Johan, 1965- (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU)
- Rossby, T. (författare)
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- 2023
- 2023
- Engelska.
- Ingår i: Journal of Geophysical Research - Oceans. - 2169-9275 .- 2169-9291. ; 128:4
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The Faroe-Bank Channel (FBC) is a key gateway through which dense overflow water of the Nordic Seas supplies the lower limb of the Atlantic Meridional Overturning Circulation. Most recently, it was discovered that a deep jet through the Faroe-Shetland Channel carries the bulk of this overflow water, but numerous questions regarding its structure, seasonality, and interannual variability as well as its linkage to atmospheric forcing remain poorly understood. A realistic high-resolution ocean reanalysis (GLORYS12; 1993–2018) is, therefore, employed to address these questions. We first confirm that the Faroe-Shetland Channel Jet is a permanent feature in GLORYS12 as well as in an ensemble of low-resolution reanalyses. On seasonal time scales, we find a strong transport covariability between this deep jet and the observed FBC overflow. On interannual time scales, the strength of this deep jet is governed by the wind-forced circulation in the Nordic Seas. Due to the largely barotropic structure of these flows, they have a signature detectable in satellite sea-surface heights. Further, we suggest that the structure of the deep jet is qualitatively consistent with a geostrophic dynamical model that accounts for along-isobath density variations. This study indicates that GLORYS12 is a promising product to study the dense water pathways and dynamics in the Nordic Seas.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
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- art (ämneskategori)
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