A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water
The aim of this PhD thesis is to deliver improved quantitative reconstructions of sub-surface temperatures, salinities and seasonal sea ice distribution. Additionally, the natural variability of Atlantic water inflow and seasonal sea ice distribution and possible forcing mechanisms such as solar ins...
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Format: | Doctoral or Postdoctoral Thesis |
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UiT Norges arktiske universitet
2014
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Online Access: | https://hdl.handle.net/10037/6801 |
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ftunivtroemsoe:oai:munin.uit.no:10037/6801 2023-05-15T15:38:38+02:00 A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water Berben, Sarah 2014-10-14 https://hdl.handle.net/10037/6801 eng eng UiT Norges arktiske universitet UiT The Arctic University of Norway 978-82-8236-153-8 (pdf) https://hdl.handle.net/10037/6801 URN:NBN:no-uit_munin_6400 openAccess Copyright 2014 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 Doctoral thesis Doktorgradsavhandling 2014 ftunivtroemsoe 2021-06-25T17:54:01Z The aim of this PhD thesis is to deliver improved quantitative reconstructions of sub-surface temperatures, salinities and seasonal sea ice distribution. Additionally, the natural variability of Atlantic water inflow and seasonal sea ice distribution and possible forcing mechanisms such as solar insolation, atmospheric circulation patterns (e.g. North Atlantic Oscillation (NAO)) and atmosphere-sea ice-ocean interactions are investigated. This is achieved by analyzing planktic foraminifera (faunal assemblages and preservation indicators), transfer function derived SST records, stable isotopes (δ18O, δ13C), Mg/Ca ratios and sea ice and phytoplankton biomarkers (IP25; brassicasterol; 24-methylenecholesterol; PBIP25 index). This multi-proxy study shows the oceanic variability in the Norwegian and Barents Sea along the pathway of Atlantic water. For the western and northern Barents Sea, the Holocene paleoceanographic evolution is described and highlights the regional and proxy-specific responses to climatic forcing mechanisms such as solar insolation. Further, late Holocene observations of fluctuating climatic conditions in the Norwegian and Barents Sea are linked to shifting NAO conditions. Overall, this study contributes to the understanding of potential forcing mechanisms and aspects of ocean-sea ice-atmosphere dynamics, as part of the climate system. The integrated sub-surface water mass and sea ice records suggest that the interaction between Atlantic water and sea ice depends on additionally interfering factors such as insolation and the NAO. Hereby, a series of new high resolution multi-proxy records illustrate the complexity of the interacting elements of the climate system resulting in different possible natural scenarios of the environmental conditions. Doctoral or Postdoctoral Thesis Barents Sea North Atlantic North Atlantic oscillation Sea ice University of Tromsø: Munin Open Research Archive Barents Sea |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 Berben, Sarah A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Marine geology: 466 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Marin geologi: 466 DOKTOR-004 |
description |
The aim of this PhD thesis is to deliver improved quantitative reconstructions of sub-surface temperatures, salinities and seasonal sea ice distribution. Additionally, the natural variability of Atlantic water inflow and seasonal sea ice distribution and possible forcing mechanisms such as solar insolation, atmospheric circulation patterns (e.g. North Atlantic Oscillation (NAO)) and atmosphere-sea ice-ocean interactions are investigated. This is achieved by analyzing planktic foraminifera (faunal assemblages and preservation indicators), transfer function derived SST records, stable isotopes (δ18O, δ13C), Mg/Ca ratios and sea ice and phytoplankton biomarkers (IP25; brassicasterol; 24-methylenecholesterol; PBIP25 index). This multi-proxy study shows the oceanic variability in the Norwegian and Barents Sea along the pathway of Atlantic water. For the western and northern Barents Sea, the Holocene paleoceanographic evolution is described and highlights the regional and proxy-specific responses to climatic forcing mechanisms such as solar insolation. Further, late Holocene observations of fluctuating climatic conditions in the Norwegian and Barents Sea are linked to shifting NAO conditions. Overall, this study contributes to the understanding of potential forcing mechanisms and aspects of ocean-sea ice-atmosphere dynamics, as part of the climate system. The integrated sub-surface water mass and sea ice records suggest that the interaction between Atlantic water and sea ice depends on additionally interfering factors such as insolation and the NAO. Hereby, a series of new high resolution multi-proxy records illustrate the complexity of the interacting elements of the climate system resulting in different possible natural scenarios of the environmental conditions. |
format |
Doctoral or Postdoctoral Thesis |
author |
Berben, Sarah |
author_facet |
Berben, Sarah |
author_sort |
Berben, Sarah |
title |
A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
title_short |
A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
title_full |
A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
title_fullStr |
A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
title_full_unstemmed |
A Holocene palaeoceanographic multi-proxy study on the variability of Atlantic water inflow and sea ice distribution along the pathway of Atlantic water |
title_sort |
holocene palaeoceanographic multi-proxy study on the variability of atlantic water inflow and sea ice distribution along the pathway of atlantic water |
publisher |
UiT Norges arktiske universitet |
publishDate |
2014 |
url |
https://hdl.handle.net/10037/6801 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Barents Sea North Atlantic North Atlantic oscillation Sea ice |
op_relation |
978-82-8236-153-8 (pdf) https://hdl.handle.net/10037/6801 URN:NBN:no-uit_munin_6400 |
op_rights |
openAccess Copyright 2014 The Author(s) |
_version_ |
1766369776475570176 |