Circulation and water masses in the Faroese Channels during overflow '73

Dooley, H. D.; Meincke, Jens

doi:10.1007/bf02226585

Cited by 138 publications

(47 citation statements)

References 7 publications

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“…1) are the deepest passage across the submarine ridge system between Iceland and the Scottish continental shelf and among the key locations for exchange between the Nordic Seas and the rest of the world ocean. The name seems to have been coined by Dooley and Meincke (1981) for the Faroe-Shetland Channel and its continuation into the Faroe Bank Channel. This includes the basin east of the Wyville Thomson Ridge, the Wyville Thomson Basin.…”

Section: Introductionmentioning

confidence: 99%

“…29). Based on results from the ICES (International Council for the Exploration of the Sea) Overflow-73 experiment, Dooley and Meincke (1981), on the other hand, suggested that the SFC splits and that approximately half of it (1.2 Sv, 1 Sv = 10 6 m 3 s −1 ) continues through the Faroe Bank Channel. This view was challenged by Hansen and Jákupsstovu (1992) and by Becker and Hansen (1998), mainly based on water mass properties.…”

Section: Introductionmentioning

confidence: 99%

“…Poulain et al, 1996;Turrell et al, 1999;Sherwin et al, 1999Sherwin et al, , 2006Hansen and Østerhus, 2000;Hunegnaw et al, 2009;Chafik, 2012). Recently, however, it has been questioned by Rossby and Flagg (2012), who returned to the scheme of Dooley and Meincke (1981) with a splitting of the SFC suggesting that 1 Sv of water from the SFC continues into the Faroe Bank Channel. Rossby and Flagg (2012), furthermore, suggest that this flow is part of a "tidally driven CircumFaroe Current", which circulates the Faroes off the shelf.…”

Section: Introductionmentioning

confidence: 99%

“…Historically, the arguments against a CFSC have mainly been based on hydrography, whereas Dooley and Meincke (1981) as well as Rossby and Flagg (2012) used direct current measurements to argue for its existence. These measurements were, however, not made in the critical boundary region between the Faroe-Shetland Channel and the Faroe Bank Channel.…”

Section: Introductionmentioning

confidence: 99%

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Atlantic water flow through the Faroese Channels

Hansen¹,

Poulsen²,

Larsen³

et al. 2017

Ocean Sci.

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Abstract. Through the Faroese Channels -the collective name for a system of channels linking the Faroe-Shetland Channel, Wyville Thomson Basin, and Faroe Bank Channel -there is a deep flow of cold waters from Arctic regions that exit the system as overflow through the Faroe Bank Channel and across the Wyville Thomson Ridge. The upper layers, in contrast, are dominated by warm, saline water masses from the southwest, termed Atlantic water. In spite of intensive research over more than a century, there are still open questions on the passage of these waters through the system with conflicting views in recent literature. Of special note is the suggestion that there is a flow of Atlantic water from the Faroe-Shetland Channel through the Faroe Bank Channel, which circles the Faroes over the slope region in a clockwise direction. Here, we combine the observational evidence from ship-borne hydrography, moored current measurements, surface drifter tracks, and satellite altimetry to address these questions and propose a general scheme for the Atlantic water flow through this channel system. We find no evidence for a continuous flow of Atlantic water from the Faroe-Shetland Channel to the Faroe Bank Channel over the Faroese slope. Rather, the southwestward-flowing water over the Faroese slope of the Faroe-Shetland Channel is totally recirculated within the combined area of the Faroe-Shetland Channel and Wyville Thomson Basin, except possibly for a small release in the form of eddies. This does not exclude a possible westward flow over the southern tip of the Faroe Shelf, but even including that, we estimate that the average volume transport of a "Circum-Faroe Current" does not exceed 0.5 Sv (1 Sv = 10 6 m 3 s −1 ). Also, there seems to be a persistent flow of Atlantic water from the western part of the Faroe Bank Channel into the Faroe-Shetland Channel that joins the Slope Current over the Scottish slope. These conclusions will affect potential impacts from offshore activities in the region and they imply that recently published observational estimates of the transport of warm water towards the Arctic obtained by different methods are incompatible.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Atlantic water flow through the Faroese Channels

Hansen¹,

Poulsen²,

Larsen³

et al. 2017

Ocean Sci.

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“…The currently accepted picture of the mean currents in the deep FSC assumes a unidirectional path of the overflow waters to the southwest [e.g., Dooley and Meincke, 1981;Sherwin et al, 2006]. The deepest currents containing the densest waters, namely the Arctic Intermediate Water (AIW) and the Nordic Seas Deep Water (NSDW), flow southwestward through the FSC and exit mainly through the FBC into the North Atlantic.…”

Section: Introductionmentioning

confidence: 99%

The deep circulation of the Faroe‐Shetland Channel: Opposing flows and topographic eddies

Broadbridge

Toumi

2015

JGR Oceans

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New insights into the deep circulation of the Faroe‐Shetland channel are gained from a high‐resolution regional ocean model. The simulation shows a more complex structure of the deep flow field than previously thought: a flow reversal of the deep and intermediate waters to the northeast on the Faroese flank of the channel and persistent topographic eddies that force the deep currents into a gyre‐like structure. This flow reversal opposes the previously accepted understanding of a purely southwestward deep flow but is in agreement with velocity measurements. The southwestward transport of the overflow waters is found to be facilitated almost exclusively by a strong and narrow current on the Shetland side of the channel. Float release experiments show that up to 38% of the overflow water takes longer than a purely southwestward flow regime suggests and up to 13% takes twice as long. From the release of tracers, a substantial amount of lateral mixing is evident within the channel, predominantly facilitated by the topographic eddies.

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Interaction of the Faroe Bank Channel overflow with Iceland Basin intermediate waters

et al. 2014

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[1] The narrow and deep Faroe Bank Channel (FBC) is an important pathway for cold, dense waters from the Nordic Seas to flow across the Iceland-Scotland ridge into the North Atlantic. The swift, turbulent FBC overflow is associated with strong vertical mixing. Hydrographic profiles from a shipboard survey and two Slocum electric gliders deployed during a cruise in May-June 2012 show an intermediate water mass characterized by low salinity and low oxygen concentration between the upper waters of Atlantic origin and the dense overflow water. A weak low-salinity signal originating north-east of Iceland is discernible at the exit of the FBC, but smeared out by intense mixing. Further west (downstream) marked salinity and oxygen minima are found, which we hypothesize are indicators of a mixture of Labrador Sea Water and Intermediate Water from the Iceland Basin. Water mass characteristics vary strongly on short time scales. Low-salinity, lowoxygen water in the stratified interface above the overflow plume is shown to move along isopycnals toward the Iceland-Faroe Front as a result of eddy stirring and a secondary, transverse circulation in the plume interface. The interaction of low-salinity, low-oxygen intermediate waters with the overflow plume already at a short distance downstream of the sill, here reported for the first time, affects the final properties of the overflow waters through entrainment and mixing.

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Circulation and water masses in the Faroese Channels during overflow '73

Cited by 138 publications

References 7 publications

Atlantic water flow through the Faroese Channels

Atlantic water flow through the Faroese Channels

The deep circulation of the Faroe‐Shetland Channel: Opposing flows and topographic eddies

Interaction of the Faroe Bank Channel overflow with Iceland Basin intermediate waters

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