Seismic reflection imaging of mixing processes in Fram Strait
The West Spitsbergen Current, which flows northward along the western Svalbard continental slope, transports warm and saline Atlantic water (AW) into the Arctic Ocean. A combined analysis of highresolution seismic images and hydrographic sections across this current has uncovered the oceanographic p...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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AGU (American Geophysical Union)
2015
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Online Access: | https://oceanrep.geomar.de/id/eprint/30413/ https://oceanrep.geomar.de/id/eprint/30413/1/Sarkar_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2015JC011009 |
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ftoceanrep:oai:oceanrep.geomar.de:30413 2023-05-15T14:54:03+02:00 Seismic reflection imaging of mixing processes in Fram Strait Sarkar, Sudipta Sheen, Katy L. Klaeschen, Dirk Brearley, J. Alexander Minshull, Timothy A. Berndt, Christian Hobbs, Richard W. Naveira Garabato, Alberto C. 2015-10 text https://oceanrep.geomar.de/id/eprint/30413/ https://oceanrep.geomar.de/id/eprint/30413/1/Sarkar_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2015JC011009 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/30413/1/Sarkar_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Sarkar, S. , Sheen, K. L., Klaeschen, D. , Brearley, J. A., Minshull, T. A., Berndt, C. , Hobbs, R. W. and Naveira Garabato, A. C. (2015) Seismic reflection imaging of mixing processes in Fram Strait. Open Access Journal of Geophysical Research: Oceans, 120 (10). pp. 6884-6896. DOI 10.1002/2015JC011009 <https://doi.org/10.1002/2015JC011009>. doi:10.1002/2015JC011009 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.1002/2015JC011009 2023-04-07T15:22:07Z The West Spitsbergen Current, which flows northward along the western Svalbard continental slope, transports warm and saline Atlantic water (AW) into the Arctic Ocean. A combined analysis of highresolution seismic images and hydrographic sections across this current has uncovered the oceanographic processes involved in horizontal and vertical mixing of AW. At the shelf break, where a strong horizontal temperature gradient exists east of the warmest AW, isopycnal interleaving of warm AW and surrounding colder waters is observed. Strong seismic reflections characterize these interleaving features, with a negative polarity reflection arising from an interface of warm water overlying colder water. A seismic-derived sound speed image reveals the extent and lateral continuity of such interleaving layers. There is evidence of obliquely aligned internal waves emanating from the slope at 450–500 m. They follow the predicted trajectory of internal S2 tidal waves and can promote vertical mixing between Atlantic and Arctic-origin waters. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Svalbard Spitsbergen OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Svalbard Journal of Geophysical Research: Oceans 120 10 6884 6896 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The West Spitsbergen Current, which flows northward along the western Svalbard continental slope, transports warm and saline Atlantic water (AW) into the Arctic Ocean. A combined analysis of highresolution seismic images and hydrographic sections across this current has uncovered the oceanographic processes involved in horizontal and vertical mixing of AW. At the shelf break, where a strong horizontal temperature gradient exists east of the warmest AW, isopycnal interleaving of warm AW and surrounding colder waters is observed. Strong seismic reflections characterize these interleaving features, with a negative polarity reflection arising from an interface of warm water overlying colder water. A seismic-derived sound speed image reveals the extent and lateral continuity of such interleaving layers. There is evidence of obliquely aligned internal waves emanating from the slope at 450–500 m. They follow the predicted trajectory of internal S2 tidal waves and can promote vertical mixing between Atlantic and Arctic-origin waters. |
format |
Article in Journal/Newspaper |
author |
Sarkar, Sudipta Sheen, Katy L. Klaeschen, Dirk Brearley, J. Alexander Minshull, Timothy A. Berndt, Christian Hobbs, Richard W. Naveira Garabato, Alberto C. |
spellingShingle |
Sarkar, Sudipta Sheen, Katy L. Klaeschen, Dirk Brearley, J. Alexander Minshull, Timothy A. Berndt, Christian Hobbs, Richard W. Naveira Garabato, Alberto C. Seismic reflection imaging of mixing processes in Fram Strait |
author_facet |
Sarkar, Sudipta Sheen, Katy L. Klaeschen, Dirk Brearley, J. Alexander Minshull, Timothy A. Berndt, Christian Hobbs, Richard W. Naveira Garabato, Alberto C. |
author_sort |
Sarkar, Sudipta |
title |
Seismic reflection imaging of mixing processes in Fram Strait |
title_short |
Seismic reflection imaging of mixing processes in Fram Strait |
title_full |
Seismic reflection imaging of mixing processes in Fram Strait |
title_fullStr |
Seismic reflection imaging of mixing processes in Fram Strait |
title_full_unstemmed |
Seismic reflection imaging of mixing processes in Fram Strait |
title_sort |
seismic reflection imaging of mixing processes in fram strait |
publisher |
AGU (American Geophysical Union) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/30413/ https://oceanrep.geomar.de/id/eprint/30413/1/Sarkar_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf https://doi.org/10.1002/2015JC011009 |
geographic |
Arctic Arctic Ocean Svalbard |
geographic_facet |
Arctic Arctic Ocean Svalbard |
genre |
Arctic Arctic Ocean Fram Strait Svalbard Spitsbergen |
genre_facet |
Arctic Arctic Ocean Fram Strait Svalbard Spitsbergen |
op_relation |
https://oceanrep.geomar.de/id/eprint/30413/1/Sarkar_et_al-2015-Journal_of_Geophysical_Research__Oceans.pdf Sarkar, S. , Sheen, K. L., Klaeschen, D. , Brearley, J. A., Minshull, T. A., Berndt, C. , Hobbs, R. W. and Naveira Garabato, A. C. (2015) Seismic reflection imaging of mixing processes in Fram Strait. Open Access Journal of Geophysical Research: Oceans, 120 (10). pp. 6884-6896. DOI 10.1002/2015JC011009 <https://doi.org/10.1002/2015JC011009>. doi:10.1002/2015JC011009 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015JC011009 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
10 |
container_start_page |
6884 |
op_container_end_page |
6896 |
_version_ |
1766325747996164096 |