Shelf and slope dynamics offshore the west Svalbard continental margin
The large-scale circulation and dense water formation (DWF) in the Svalbard archipelago influence the thermohaline circulation in the whole Arctic. In particular, DWF depends on the rate of cooling and homogenisation of the Atlantic water along its northward pathway, brine rejection, boundary convec...
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ftawi:oai:epic.awi.de:45779 2023-05-15T14:58:36+02:00 Shelf and slope dynamics offshore the west Svalbard continental margin Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Aliani, Stefano Rebesco, Michele De Vittor, Cinzia Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, Ragnheid Nilsen, F. Forwick, Matthias Beszczynska-Moeller, A. Ivaldi, R. Demarte, M. Miserocchi, Stefano Viola, A. 2018-06 https://epic.awi.de/id/eprint/45779/ https://hdl.handle.net/10013/epic.ad969458-e81e-49e9-a79b-fb10bdc6b88c unknown Bensi, M. , Langone, L. , Kovacevic, V. , Ursella, L. , Goszczko, I. , Aliani, S. , Rebesco, M. , De Vittor, C. , Relitti, F. , Bazzaro, M. , Deponte, D. , Laterza, R. , Mansutti, P. , Lucchi, R. , Wahlin, A. , Soltwedel, T. orcid:0000-0002-8214-5937 , Skogseth, R. , Nilsen, F. , Forwick, M. , Beszczynska-Moeller, A. , Ivaldi, R. , Demarte, M. , Miserocchi, S. and Viola, A. (2018) Shelf and slope dynamics offshore the west Svalbard continental margin , POLAR 2018 Conference . hdl:10013/epic.ad969458-e81e-49e9-a79b-fb10bdc6b88c EPIC3POLAR 2018 Conference Conference notRev 2018 ftawi 2021-12-24T15:43:23Z The large-scale circulation and dense water formation (DWF) in the Svalbard archipelago influence the thermohaline circulation in the whole Arctic. In particular, DWF depends on the rate of cooling and homogenisation of the Atlantic water along its northward pathway, brine rejection, boundary convection on shelves and slopes, and open-ocean convection. This study focuses on brine rejection, shelf convection and entrainment processes, which occur in the SW Spitsbergen area. Two short (~140m) moorings (named S1 and ID2), deployed at a depth of ~1040 m over the slope, collected multiannual (2014-2017) time-series in an area of interaction between the West Spitsbergen Current and the descending dense shelf plumes. Time-series revealed a large thermohaline and current variability between October and April. Data highlight the presence of Norwegian Sea Deep Water (θ = -0.90°C, S = 34.90, σθ = 28.07 kg m-3) influenced by occasional intrusions of warmer (up to +2°C), saltier (up to ~35), and less dense (down to 27.98 kg m-3) water during fall-winter periods. Interestingly, such intrusions occur simultaneously at both sites, despite their distance (~170 km), suggesting that winter meteorological perturbations play an important role in triggering dense shelf plumes, which collect particulate matter during their descent. Here we discuss the origin, timing, and role of such turbidity plumes in a period characterized by a general warming and ice reduction of the Arctic. Conference Object Arctic Norwegian Sea Svalbard Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Svalbard Norwegian Sea Svalbard Archipelago |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The large-scale circulation and dense water formation (DWF) in the Svalbard archipelago influence the thermohaline circulation in the whole Arctic. In particular, DWF depends on the rate of cooling and homogenisation of the Atlantic water along its northward pathway, brine rejection, boundary convection on shelves and slopes, and open-ocean convection. This study focuses on brine rejection, shelf convection and entrainment processes, which occur in the SW Spitsbergen area. Two short (~140m) moorings (named S1 and ID2), deployed at a depth of ~1040 m over the slope, collected multiannual (2014-2017) time-series in an area of interaction between the West Spitsbergen Current and the descending dense shelf plumes. Time-series revealed a large thermohaline and current variability between October and April. Data highlight the presence of Norwegian Sea Deep Water (θ = -0.90°C, S = 34.90, σθ = 28.07 kg m-3) influenced by occasional intrusions of warmer (up to +2°C), saltier (up to ~35), and less dense (down to 27.98 kg m-3) water during fall-winter periods. Interestingly, such intrusions occur simultaneously at both sites, despite their distance (~170 km), suggesting that winter meteorological perturbations play an important role in triggering dense shelf plumes, which collect particulate matter during their descent. Here we discuss the origin, timing, and role of such turbidity plumes in a period characterized by a general warming and ice reduction of the Arctic. |
format |
Conference Object |
author |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Aliani, Stefano Rebesco, Michele De Vittor, Cinzia Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, Ragnheid Nilsen, F. Forwick, Matthias Beszczynska-Moeller, A. Ivaldi, R. Demarte, M. Miserocchi, Stefano Viola, A. |
spellingShingle |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Aliani, Stefano Rebesco, Michele De Vittor, Cinzia Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, Ragnheid Nilsen, F. Forwick, Matthias Beszczynska-Moeller, A. Ivaldi, R. Demarte, M. Miserocchi, Stefano Viola, A. Shelf and slope dynamics offshore the west Svalbard continental margin |
author_facet |
Bensi, Manuel Langone, Leonardo Kovacevic, Vedrana Ursella, Laura Goszczko, Ilona Aliani, Stefano Rebesco, Michele De Vittor, Cinzia Relitti, F. Bazzaro, M. Deponte, Davide Laterza, R. Mansutti, P. Lucchi, Renata Wahlin, Anna Soltwedel, Thomas Skogseth, Ragnheid Nilsen, F. Forwick, Matthias Beszczynska-Moeller, A. Ivaldi, R. Demarte, M. Miserocchi, Stefano Viola, A. |
author_sort |
Bensi, Manuel |
title |
Shelf and slope dynamics offshore the west Svalbard continental margin |
title_short |
Shelf and slope dynamics offshore the west Svalbard continental margin |
title_full |
Shelf and slope dynamics offshore the west Svalbard continental margin |
title_fullStr |
Shelf and slope dynamics offshore the west Svalbard continental margin |
title_full_unstemmed |
Shelf and slope dynamics offshore the west Svalbard continental margin |
title_sort |
shelf and slope dynamics offshore the west svalbard continental margin |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/45779/ https://hdl.handle.net/10013/epic.ad969458-e81e-49e9-a79b-fb10bdc6b88c |
geographic |
Arctic Svalbard Norwegian Sea Svalbard Archipelago |
geographic_facet |
Arctic Svalbard Norwegian Sea Svalbard Archipelago |
genre |
Arctic Norwegian Sea Svalbard Spitsbergen |
genre_facet |
Arctic Norwegian Sea Svalbard Spitsbergen |
op_source |
EPIC3POLAR 2018 Conference |
op_relation |
Bensi, M. , Langone, L. , Kovacevic, V. , Ursella, L. , Goszczko, I. , Aliani, S. , Rebesco, M. , De Vittor, C. , Relitti, F. , Bazzaro, M. , Deponte, D. , Laterza, R. , Mansutti, P. , Lucchi, R. , Wahlin, A. , Soltwedel, T. orcid:0000-0002-8214-5937 , Skogseth, R. , Nilsen, F. , Forwick, M. , Beszczynska-Moeller, A. , Ivaldi, R. , Demarte, M. , Miserocchi, S. and Viola, A. (2018) Shelf and slope dynamics offshore the west Svalbard continental margin , POLAR 2018 Conference . hdl:10013/epic.ad969458-e81e-49e9-a79b-fb10bdc6b88c |
_version_ |
1766330736841850880 |