Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data
For the first time, the materials of oceanographic measurements in the Lofoten basin, made by oceanographers from the Knipovich Polar Research Institute of Marine Fisheries and Oceanography (PINRO, Murmansk, Russia) from the “Fridtjof Nansen” research ship in July 1998, 2000–2002 and 2005 during the...
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Online Access: | https://doi.org/10.21638/spbu07.2018.406 http://hdl.handle.net/11701/15419 |
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ftstpetersburgun:oai:dspace.spbu.ru:11701/15419 2023-05-15T16:18:28+02:00 Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data Belonenko, Tatyana V. Koldunov, Aleksey V. Sentyabov, Evgeniy V. Karsakov, Alexey L. 2018-12 https://doi.org/10.21638/spbu07.2018.406 http://hdl.handle.net/11701/15419 ru rus St Petersburg State University Vestnik of St Petersburg University. Earth Sciences;Volume 63; Issue 4 Norwegian Sea Lofoten basin Lofoten vortex synoptic mesoscale eddies hydrological sections temperature salinity MITgcm Article 2018 ftstpetersburgun https://doi.org/10.21638/spbu07.2018.406 2019-04-08T23:42:24Z For the first time, the materials of oceanographic measurements in the Lofoten basin, made by oceanographers from the Knipovich Polar Research Institute of Marine Fisheries and Oceanography (PINRO, Murmansk, Russia) from the “Fridtjof Nansen” research ship in July 1998, 2000–2002 and 2005 during the investigations in the Norwegian and Greenland seas. We compare these materials with thermohaline sections for the same periods deriving from the MITgcm simulation. We found that the greatest horizontal contrasts of temperature and salinity are characteristic of a region with dimensions of 180–200 miles horizontally and more than 1000 m vertically, and the core of the Lofoten vortex is located in a layer at the depth of 200-800 m and has a radius varying from 20 to 60 km. It is established that apart from the quasi-permanent Lofoten vortex, many mesoscale vortices located at a depth between 50-500 m are observed in the basin, spatial scales and characteristic gradients of which can be compared to the characteristics of the Lofoten vortex. The distribution of thermohaline characteristic values according to the PINRO hydrological sections and the MITgcm model generally correspond to each other, but in the most considered cases the model data are slightly larger in zonal gradients of temperature and salinity. Based on a direct comparison of model data and field measurements, it is shown that in the considered periods the MITgcm data adequately reflect the hydrological parameters of the water area and can be used for retrospective analysis of the vortex activity in the Lofoten basin. Работа выполнена при финансовой поддержке Российского научного фонда, грант № 18-17-00027. Авторы выражают благодарность Д. Л. Волкову и NASA Advanced Supercomputing (NAS) Division за данные, полученные в ходе реализации MITgcm. Article in Journal/Newspaper Fridtjof Nansen Greenland Lofoten Norwegian Sea Saint Petersburg State University: Research Repository (DSpace SPbU) Fridtjof ENVELOPE(-56.717,-56.717,-63.567,-63.567) Greenland Lofoten Lofoten Basin ENVELOPE(4.000,4.000,70.000,70.000) Murmansk Norwegian Sea Vestnik of Saint Petersburg University. Earth Sciences 63 4 |
institution |
Open Polar |
collection |
Saint Petersburg State University: Research Repository (DSpace SPbU) |
op_collection_id |
ftstpetersburgun |
language |
Russian |
topic |
Norwegian Sea Lofoten basin Lofoten vortex synoptic mesoscale eddies hydrological sections temperature salinity MITgcm |
spellingShingle |
Norwegian Sea Lofoten basin Lofoten vortex synoptic mesoscale eddies hydrological sections temperature salinity MITgcm Belonenko, Tatyana V. Koldunov, Aleksey V. Sentyabov, Evgeniy V. Karsakov, Alexey L. Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
topic_facet |
Norwegian Sea Lofoten basin Lofoten vortex synoptic mesoscale eddies hydrological sections temperature salinity MITgcm |
description |
For the first time, the materials of oceanographic measurements in the Lofoten basin, made by oceanographers from the Knipovich Polar Research Institute of Marine Fisheries and Oceanography (PINRO, Murmansk, Russia) from the “Fridtjof Nansen” research ship in July 1998, 2000–2002 and 2005 during the investigations in the Norwegian and Greenland seas. We compare these materials with thermohaline sections for the same periods deriving from the MITgcm simulation. We found that the greatest horizontal contrasts of temperature and salinity are characteristic of a region with dimensions of 180–200 miles horizontally and more than 1000 m vertically, and the core of the Lofoten vortex is located in a layer at the depth of 200-800 m and has a radius varying from 20 to 60 km. It is established that apart from the quasi-permanent Lofoten vortex, many mesoscale vortices located at a depth between 50-500 m are observed in the basin, spatial scales and characteristic gradients of which can be compared to the characteristics of the Lofoten vortex. The distribution of thermohaline characteristic values according to the PINRO hydrological sections and the MITgcm model generally correspond to each other, but in the most considered cases the model data are slightly larger in zonal gradients of temperature and salinity. Based on a direct comparison of model data and field measurements, it is shown that in the considered periods the MITgcm data adequately reflect the hydrological parameters of the water area and can be used for retrospective analysis of the vortex activity in the Lofoten basin. Работа выполнена при финансовой поддержке Российского научного фонда, грант № 18-17-00027. Авторы выражают благодарность Д. Л. Волкову и NASA Advanced Supercomputing (NAS) Division за данные, полученные в ходе реализации MITgcm. |
format |
Article in Journal/Newspaper |
author |
Belonenko, Tatyana V. Koldunov, Aleksey V. Sentyabov, Evgeniy V. Karsakov, Alexey L. |
author_facet |
Belonenko, Tatyana V. Koldunov, Aleksey V. Sentyabov, Evgeniy V. Karsakov, Alexey L. |
author_sort |
Belonenko, Tatyana V. |
title |
Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
title_short |
Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
title_full |
Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
title_fullStr |
Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
title_full_unstemmed |
Thermohaline structure of the Lofoten vortex in the Norwegian Sea based on in-situ and model data |
title_sort |
thermohaline structure of the lofoten vortex in the norwegian sea based on in-situ and model data |
publisher |
St Petersburg State University |
publishDate |
2018 |
url |
https://doi.org/10.21638/spbu07.2018.406 http://hdl.handle.net/11701/15419 |
long_lat |
ENVELOPE(-56.717,-56.717,-63.567,-63.567) ENVELOPE(4.000,4.000,70.000,70.000) |
geographic |
Fridtjof Greenland Lofoten Lofoten Basin Murmansk Norwegian Sea |
geographic_facet |
Fridtjof Greenland Lofoten Lofoten Basin Murmansk Norwegian Sea |
genre |
Fridtjof Nansen Greenland Lofoten Norwegian Sea |
genre_facet |
Fridtjof Nansen Greenland Lofoten Norwegian Sea |
op_relation |
Vestnik of St Petersburg University. Earth Sciences;Volume 63; Issue 4 |
op_doi |
https://doi.org/10.21638/spbu07.2018.406 |
container_title |
Vestnik of Saint Petersburg University. Earth Sciences |
container_volume |
63 |
container_issue |
4 |
_version_ |
1766004632542248960 |