Direct velocity observations of volume flux between Iceland and the Shetland Islands
Atlantic Waters flowing northward into the Nordic Seas are important for their role as an early indicator of changes to deepwater formation. As such, this requires a fundamental understanding of the pathways and volume fluxes through the primary passageways from the Atlantic into the Nordic Seas. A...
Published in: | Journal of Geophysical Research: Oceans |
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ftunivrhodeislan:oai:digitalcommons.uri.edu:gsofacpubs-3213 2024-02-11T10:03:43+01:00 Direct velocity observations of volume flux between Iceland and the Shetland Islands Childers, Katelin H. Flagg, Charles N. Rossby, Thomas 2014-09-01T07:00:00Z https://digitalcommons.uri.edu/gsofacpubs/2244 https://doi.org/10.1002/2014JC009946 unknown DigitalCommons@URI https://digitalcommons.uri.edu/gsofacpubs/2244 doi:10.1002/2014JC009946 https://doi.org/10.1002/2014JC009946 Graduate School of Oceanography Faculty Publications currents transport velocities volume text 2014 ftunivrhodeislan https://doi.org/10.1002/2014JC009946 2024-01-15T19:10:09Z Atlantic Waters flowing northward into the Nordic Seas are important for their role as an early indicator of changes to deepwater formation. As such, this requires a fundamental understanding of the pathways and volume fluxes through the primary passageways from the Atlantic into the Nordic Seas. A mean annual volume transport of 6.1 ± 0.3 Sv was observed flowing in above the σt = 27.8 isopycnal (a proxy for the lower limit of Atlantic Water depth), through the Faroe Shetland Channel (FSC) and over the Iceland Faroes Ridge (IFR) from March 2008 to June 2012, using repeat velocity sections obtained from a vessel mounted Acoustic Doppler Current Profiler (ADCP). A new vessel route has expanded the spatial coverage of FSC observations and reveals a difference in average inflow transport, which most likely results from an interannual variation in the total transport through the FSC, which in turn is tied to a weakening of the southerly flow over the western slope of the channel. This interannual variability has increased the mean transport through the FSC from 0.9 Sv observed over the first 2 years of this program by Rossby and Flagg (2012) to a 4.5 year mean of 1.7 ± 0.2 Sv, which emphasizes the importance of knowing the flow along the Faroese shelf. Interannual fluctuations in transport observed over the IFR are related to the width of the inflow over the Faroese half of the ridge. Key Points Direct measurements show 4.6 Sv of inflow across the IFR toward the Nordic Seas Flows across the IFR and through the FSC are have high short-term variability Text Faroes Iceland Nordic Seas University of Rhode Island: DigitalCommons@URI Journal of Geophysical Research: Oceans 119 9 5934 5944 |
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University of Rhode Island: DigitalCommons@URI |
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currents transport velocities volume |
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currents transport velocities volume Childers, Katelin H. Flagg, Charles N. Rossby, Thomas Direct velocity observations of volume flux between Iceland and the Shetland Islands |
topic_facet |
currents transport velocities volume |
description |
Atlantic Waters flowing northward into the Nordic Seas are important for their role as an early indicator of changes to deepwater formation. As such, this requires a fundamental understanding of the pathways and volume fluxes through the primary passageways from the Atlantic into the Nordic Seas. A mean annual volume transport of 6.1 ± 0.3 Sv was observed flowing in above the σt = 27.8 isopycnal (a proxy for the lower limit of Atlantic Water depth), through the Faroe Shetland Channel (FSC) and over the Iceland Faroes Ridge (IFR) from March 2008 to June 2012, using repeat velocity sections obtained from a vessel mounted Acoustic Doppler Current Profiler (ADCP). A new vessel route has expanded the spatial coverage of FSC observations and reveals a difference in average inflow transport, which most likely results from an interannual variation in the total transport through the FSC, which in turn is tied to a weakening of the southerly flow over the western slope of the channel. This interannual variability has increased the mean transport through the FSC from 0.9 Sv observed over the first 2 years of this program by Rossby and Flagg (2012) to a 4.5 year mean of 1.7 ± 0.2 Sv, which emphasizes the importance of knowing the flow along the Faroese shelf. Interannual fluctuations in transport observed over the IFR are related to the width of the inflow over the Faroese half of the ridge. Key Points Direct measurements show 4.6 Sv of inflow across the IFR toward the Nordic Seas Flows across the IFR and through the FSC are have high short-term variability |
format |
Text |
author |
Childers, Katelin H. Flagg, Charles N. Rossby, Thomas |
author_facet |
Childers, Katelin H. Flagg, Charles N. Rossby, Thomas |
author_sort |
Childers, Katelin H. |
title |
Direct velocity observations of volume flux between Iceland and the Shetland Islands |
title_short |
Direct velocity observations of volume flux between Iceland and the Shetland Islands |
title_full |
Direct velocity observations of volume flux between Iceland and the Shetland Islands |
title_fullStr |
Direct velocity observations of volume flux between Iceland and the Shetland Islands |
title_full_unstemmed |
Direct velocity observations of volume flux between Iceland and the Shetland Islands |
title_sort |
direct velocity observations of volume flux between iceland and the shetland islands |
publisher |
DigitalCommons@URI |
publishDate |
2014 |
url |
https://digitalcommons.uri.edu/gsofacpubs/2244 https://doi.org/10.1002/2014JC009946 |
genre |
Faroes Iceland Nordic Seas |
genre_facet |
Faroes Iceland Nordic Seas |
op_source |
Graduate School of Oceanography Faculty Publications |
op_relation |
https://digitalcommons.uri.edu/gsofacpubs/2244 doi:10.1002/2014JC009946 https://doi.org/10.1002/2014JC009946 |
op_doi |
https://doi.org/10.1002/2014JC009946 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
119 |
container_issue |
9 |
container_start_page |
5934 |
op_container_end_page |
5944 |
_version_ |
1790600042235559936 |