Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales
Recent observations of enhanced oceanic heat transfer into the Arctic concomitant with the rapid sea-ice decrease temptingly suggest a direct relationship between both features. However, except for marginal areas of the Arctic Ocean where warm and saline Atlantic Water (AW) reaches the surface, the...
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ftoceanrep:oai:oceanrep.geomar.de:27025 2023-05-15T14:23:09+02:00 Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales Werner, Kirstin O'Regan, Matt Bauch, Dorothea Meier, Walter N. Pavlov, Alexey Goszczko, Ilona Van Nieuwenhove, Nicolas Nikolopoulos, Anna Müller, Juliane Pzytarska, Joanna Frey, Karen E. De Vernal, Anne Jakobsson, Martin 2014 text https://oceanrep.geomar.de/id/eprint/27025/ https://oceanrep.geomar.de/id/eprint/27025/1/2014_Werner-et-al_ISTAS.pdf en eng IUEM https://oceanrep.geomar.de/id/eprint/27025/1/2014_Werner-et-al_ISTAS.pdf Werner, K., O'Regan, M., Bauch, D. , Meier, W. N., Pavlov, A., Goszczko, I., Van Nieuwenhove, N. , Nikolopoulos, A., Müller, J., Pzytarska, J., Frey, K. E., De Vernal, A. and Jakobsson, M. (2014) Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales. [Talk] In: ISTAS: Integrating Spatial and Temporal Scales in the Changing Arctic System. , 21.10.-24.10.2014, Plouzané, France . ISTAS: Integrating Spatial and Temporal Scales in the Changing Arctic System : Towards Future Research Priorities Oct 21 - 24, Plouzané, IUEM Book of Abstracts – Plenary Session. p. 41 . cc_by_nc Conference or Workshop Item NonPeerReviewed 2014 ftoceanrep 2023-04-07T15:16:51Z Recent observations of enhanced oceanic heat transfer into the Arctic concomitant with the rapid sea-ice decrease temptingly suggest a direct relationship between both features. However, except for marginal areas of the Arctic Ocean where warm and saline Atlantic Water (AW) reaches the surface, the majority of AW heat is presently isolated from the sea-ice cover by a cold and fresh halocline layer. No evidence has been found to suggest a weakening of the halocline across the central Arctic basins that would enhance the AW heat transfer to the surface. A more direct link between sea-ice reduction and AW inflow is, however, seen in the inflowing Barents Sea branch in both historical and observational time series. In this presentation the AW advection into the Arctic Ocean and its influence on sea-ice variability will be reviewed from a geological point of view. Records from the geologic past are of great value as the time span of modern observations and historical data is often too short to comprehend long-term trends and causes of AW variability, changes in the marginal ice zone, and the vertical structure of the Arctic water column. Paleoceanographic studies from the recent interglacial indirectly suggest that the strength of AW advection and its propagation into the Arctic interior is effective in melting sea ice in combination with other factors such as insolation, sea level, freshwater input, and upper water mass stratification. However, to date, very little paleoceanographic work in the Arctic has focused on how the strength and position of the halocline has changed during previous interglacial periods. More direct reconstructions of the Arctic’s vertical stratification in the geologic past are needed to provide a longer-term view on the stability of the halocline, and more generally, the role of Atlantic Water inflow on the stability of sea ice in the interior basins. Conference Object Arctic Arctic Arctic Ocean Barents Sea Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Barents Sea |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Recent observations of enhanced oceanic heat transfer into the Arctic concomitant with the rapid sea-ice decrease temptingly suggest a direct relationship between both features. However, except for marginal areas of the Arctic Ocean where warm and saline Atlantic Water (AW) reaches the surface, the majority of AW heat is presently isolated from the sea-ice cover by a cold and fresh halocline layer. No evidence has been found to suggest a weakening of the halocline across the central Arctic basins that would enhance the AW heat transfer to the surface. A more direct link between sea-ice reduction and AW inflow is, however, seen in the inflowing Barents Sea branch in both historical and observational time series. In this presentation the AW advection into the Arctic Ocean and its influence on sea-ice variability will be reviewed from a geological point of view. Records from the geologic past are of great value as the time span of modern observations and historical data is often too short to comprehend long-term trends and causes of AW variability, changes in the marginal ice zone, and the vertical structure of the Arctic water column. Paleoceanographic studies from the recent interglacial indirectly suggest that the strength of AW advection and its propagation into the Arctic interior is effective in melting sea ice in combination with other factors such as insolation, sea level, freshwater input, and upper water mass stratification. However, to date, very little paleoceanographic work in the Arctic has focused on how the strength and position of the halocline has changed during previous interglacial periods. More direct reconstructions of the Arctic’s vertical stratification in the geologic past are needed to provide a longer-term view on the stability of the halocline, and more generally, the role of Atlantic Water inflow on the stability of sea ice in the interior basins. |
format |
Conference Object |
author |
Werner, Kirstin O'Regan, Matt Bauch, Dorothea Meier, Walter N. Pavlov, Alexey Goszczko, Ilona Van Nieuwenhove, Nicolas Nikolopoulos, Anna Müller, Juliane Pzytarska, Joanna Frey, Karen E. De Vernal, Anne Jakobsson, Martin |
spellingShingle |
Werner, Kirstin O'Regan, Matt Bauch, Dorothea Meier, Walter N. Pavlov, Alexey Goszczko, Ilona Van Nieuwenhove, Nicolas Nikolopoulos, Anna Müller, Juliane Pzytarska, Joanna Frey, Karen E. De Vernal, Anne Jakobsson, Martin Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
author_facet |
Werner, Kirstin O'Regan, Matt Bauch, Dorothea Meier, Walter N. Pavlov, Alexey Goszczko, Ilona Van Nieuwenhove, Nicolas Nikolopoulos, Anna Müller, Juliane Pzytarska, Joanna Frey, Karen E. De Vernal, Anne Jakobsson, Martin |
author_sort |
Werner, Kirstin |
title |
Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
title_short |
Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
title_full |
Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
title_fullStr |
Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
title_full_unstemmed |
Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales |
title_sort |
evaluating the role of atlantic water advection to the arctic ocean on geological, historical, and observational timescales |
publisher |
IUEM |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/27025/ https://oceanrep.geomar.de/id/eprint/27025/1/2014_Werner-et-al_ISTAS.pdf |
geographic |
Arctic Arctic Ocean Barents Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea |
genre |
Arctic Arctic Arctic Ocean Barents Sea Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/27025/1/2014_Werner-et-al_ISTAS.pdf Werner, K., O'Regan, M., Bauch, D. , Meier, W. N., Pavlov, A., Goszczko, I., Van Nieuwenhove, N. , Nikolopoulos, A., Müller, J., Pzytarska, J., Frey, K. E., De Vernal, A. and Jakobsson, M. (2014) Evaluating the role of Atlantic Water advection to the Arctic Ocean on geological, historical, and observational timescales. [Talk] In: ISTAS: Integrating Spatial and Temporal Scales in the Changing Arctic System. , 21.10.-24.10.2014, Plouzané, France . ISTAS: Integrating Spatial and Temporal Scales in the Changing Arctic System : Towards Future Research Priorities Oct 21 - 24, Plouzané, IUEM Book of Abstracts – Plenary Session. p. 41 . |
op_rights |
cc_by_nc |
_version_ |
1766295640383422464 |