Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017
In the last decades, the Arctic region has gained a large interest because of climate changes and relevant effects on ice melting and global warming. Abrupt changes in the atmosphere are responsible for significant changes in ocean water masses and large-scale circulation patterns, which in turn aff...
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ftawi:oai:epic.awi.de:45281 2024-09-15T17:51:34+00:00 Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Rebesco, Michele De Vittor, Cinzia Aliani, Stefano Miserocchi, S. Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, R. Falck, E. Nilsen, F. 2017 https://epic.awi.de/id/eprint/45281/ https://hdl.handle.net/10013/epic.51957 unknown Bensi, M. , Langone, L. , Kovacevic, V. , Ursella, L. , Goszczko, I. , Rebesco, M. , De Vittor, C. , Aliani, S. , Miserocchi, S. , Relitti, F. , Bazzaro, M. , Deponte, D. , Laterza, R. , Mansutti, P. , Lucchi, R. , Wahlin, A. , Soltwedel, T. orcid:0000-0002-8214-5937 , Skogseth, R. , Falck, E. and Nilsen, F. (2017) Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 , Svalbard Science Conference 2017 - cooperation for the future, 6 November 2017 - 8 November 2017 . hdl:10013/epic.51957 EPIC3Svalbard Science Conference 2017 - cooperation for the future, 2017-11-06-2017-11-08 Conference notRev 2017 ftawi 2024-06-24T04:18:50Z In the last decades, the Arctic region has gained a large interest because of climate changes and relevant effects on ice melting and global warming. Abrupt changes in the atmosphere are responsible for significant changes in ocean water masses and large-scale circulation patterns, which in turn affect the global climate. Studying ocean circulation and related processes along the west Svalbard slope and within the Storfjorden (south Svalbard Archipelago) is essential to describe the thermohaline circulation and the dense water formation (DWF) in the Arctic, and the way they contribute to the global thermohaline circulation. DWF processes in this region depend on the rate of cooling and homogenisation of the Atlantic water along its northwards pathway, brine rejection phenomena, boundary convection on the Arctic Ocean shelves and slopes, and deep open-ocean convection in the central gyres of the Greenland and Iceland Seas. This study focuses on brine rejection, shelf convection and entrainment processes, which occur on the west Svalbard margin and in the Storfjorden during the winter season. Two short (~140m) moorings (named S1 and ID2, figure 1) were deployed ~1000m deep along the slope in 2014, to collect multiannual time-series in an area of potential interaction between the West Spitsbergen Current and the descending dense shelf plumes. Four oceanographic cruises were carried out between 2014 and 2017 to integrate time-series with CTD (conductivity-temperature-depth) casts in the area. One purpose of this research activity was to study the role played by bottom currents in the formation of two sediment drifts (Isfjorden and Bellsund). At S1 and ID2, time-series revealed a large thermohaline and current variability during the winter period, from October to April. Our data highlight the presence of a stable signal of Norwegian Sea Deep Water (θ = -0.90°C, S = 34.90, σθ = 28.07 kg m-3) at 1000m depth, influenced by occasional intrusions of warmer (up to +2°C), saltier (up to ~35), and less dense (down to 27.98 ... Conference Object Arctic Arctic Ocean Bellsund Global warming Greenland Iceland Isfjord* Isfjord* Isfjorden Isfjorden Norwegian Sea Storfjorden Svalbard Svalbard margin Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In the last decades, the Arctic region has gained a large interest because of climate changes and relevant effects on ice melting and global warming. Abrupt changes in the atmosphere are responsible for significant changes in ocean water masses and large-scale circulation patterns, which in turn affect the global climate. Studying ocean circulation and related processes along the west Svalbard slope and within the Storfjorden (south Svalbard Archipelago) is essential to describe the thermohaline circulation and the dense water formation (DWF) in the Arctic, and the way they contribute to the global thermohaline circulation. DWF processes in this region depend on the rate of cooling and homogenisation of the Atlantic water along its northwards pathway, brine rejection phenomena, boundary convection on the Arctic Ocean shelves and slopes, and deep open-ocean convection in the central gyres of the Greenland and Iceland Seas. This study focuses on brine rejection, shelf convection and entrainment processes, which occur on the west Svalbard margin and in the Storfjorden during the winter season. Two short (~140m) moorings (named S1 and ID2, figure 1) were deployed ~1000m deep along the slope in 2014, to collect multiannual time-series in an area of potential interaction between the West Spitsbergen Current and the descending dense shelf plumes. Four oceanographic cruises were carried out between 2014 and 2017 to integrate time-series with CTD (conductivity-temperature-depth) casts in the area. One purpose of this research activity was to study the role played by bottom currents in the formation of two sediment drifts (Isfjorden and Bellsund). At S1 and ID2, time-series revealed a large thermohaline and current variability during the winter period, from October to April. Our data highlight the presence of a stable signal of Norwegian Sea Deep Water (θ = -0.90°C, S = 34.90, σθ = 28.07 kg m-3) at 1000m depth, influenced by occasional intrusions of warmer (up to +2°C), saltier (up to ~35), and less dense (down to 27.98 ... |
format |
Conference Object |
author |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Rebesco, Michele De Vittor, Cinzia Aliani, Stefano Miserocchi, S. Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, R. Falck, E. Nilsen, F. |
spellingShingle |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Rebesco, Michele De Vittor, Cinzia Aliani, Stefano Miserocchi, S. Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, R. Falck, E. Nilsen, F. Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
author_facet |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Rebesco, Michele De Vittor, Cinzia Aliani, Stefano Miserocchi, S. Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, R. Falck, E. Nilsen, F. |
author_sort |
Bensi, Manuel |
title |
Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
title_short |
Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
title_full |
Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
title_fullStr |
Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
title_full_unstemmed |
Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 |
title_sort |
dense water plumes sw off spitsbergen archipelago (arctic) in 2014-2017 |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45281/ https://hdl.handle.net/10013/epic.51957 |
genre |
Arctic Arctic Ocean Bellsund Global warming Greenland Iceland Isfjord* Isfjord* Isfjorden Isfjorden Norwegian Sea Storfjorden Svalbard Svalbard margin Spitsbergen |
genre_facet |
Arctic Arctic Ocean Bellsund Global warming Greenland Iceland Isfjord* Isfjord* Isfjorden Isfjorden Norwegian Sea Storfjorden Svalbard Svalbard margin Spitsbergen |
op_source |
EPIC3Svalbard Science Conference 2017 - cooperation for the future, 2017-11-06-2017-11-08 |
op_relation |
Bensi, M. , Langone, L. , Kovacevic, V. , Ursella, L. , Goszczko, I. , Rebesco, M. , De Vittor, C. , Aliani, S. , Miserocchi, S. , Relitti, F. , Bazzaro, M. , Deponte, D. , Laterza, R. , Mansutti, P. , Lucchi, R. , Wahlin, A. , Soltwedel, T. orcid:0000-0002-8214-5937 , Skogseth, R. , Falck, E. and Nilsen, F. (2017) Dense water plumes SW off Spitsbergen Archipelago (Arctic) in 2014-2017 , Svalbard Science Conference 2017 - cooperation for the future, 6 November 2017 - 8 November 2017 . hdl:10013/epic.51957 |
_version_ |
1810293509336334336 |