Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope
Three marine sediment cores distributed along the Norwegian (MD95-2011), Barents Sea (JM09-KA11-GC), and Svalbard (HH11-134-BC) continental margins have been investigated in order to reconstruct changes in the poleward flow of Atlantic waters (AW) and in the nature of upper surface water masses with...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.842591 2023-05-15T14:58:05+02:00 Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope Dylmer, Christian Valdemar Giraudeau, Jacques Eynaud, Frédérique Husum, Katrine de Vernal, Anne LATITUDE: 77.599330 * LONGITUDE: 9.887500 2013-02-11 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.842591 https://doi.org/10.1594/PANGAEA.842591 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.842591 https://doi.org/10.1594/PANGAEA.842591 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Dylmer, Christian Valdemar; Giraudeau, Jacques; Eynaud, Frédérique; Husum, Katrine; de Vernal, Anne (2013): Northward advection of Atlantic water in the eastern Nordic Seas over the last 3000 yr. Climate of the Past, 9(4), 1505-1518, https://doi.org/10.5194/cp-9-1505-2013 BC Box corer Helmer Hanssen HH11 HH11-134-BC HH2011 North Atlantic Dataset 2013 ftpangaea https://doi.org/10.1594/PANGAEA.842591 https://doi.org/10.5194/cp-9-1505-2013 2023-01-20T07:33:25Z Three marine sediment cores distributed along the Norwegian (MD95-2011), Barents Sea (JM09-KA11-GC), and Svalbard (HH11-134-BC) continental margins have been investigated in order to reconstruct changes in the poleward flow of Atlantic waters (AW) and in the nature of upper surface water masses within the eastern Nordic Seas over the last 3000 yr. These reconstructions are based on a limited set of coccolith proxies: the abundance ratio between Emiliania huxleyi and Coccolithus pelagicus, an index of Atlantic vs. Polar/Arctic surface water masses; and Gephyrocapsa muellerae, a drifted coccolith species from the temperate North Atlantic, whose abundance changes are related to variations in the strength of the North Atlantic Current. The entire investigated area, from 66 to 77° N, was affected by an overall increase in AW flow from 3000 cal yr BP (before present) to the present. The long-term modulation of westerlies' strength and location, which are essentially driven by the dominant mode of the North Atlantic Oscillation (NAO), is thought to explain the observed dynamics of poleward AW flow. The same mechanism also reconciles the recorded opposite zonal shifts in the location of the Arctic front between the area off western Norway and the western Barents Sea-eastern Fram Strait region. The Little Ice Age (LIA) was governed by deteriorating conditions, with Arctic/Polar waters dominating in the surface off western Svalbard and western Barents Sea, possibly associated with both severe sea ice conditions and a strongly reduced AW strength. A sudden short pulse of resumed high WSC (West Spitsbergen Current) flow interrupted this cold spell in eastern Fram Strait from 330 to 410 cal yr BP. Our dataset not only confirms the high amplitude warming of surface waters at the turn of the 19th century off western Svalbard, it also shows that such a warming was primarily induced by an excess flow of AW which stands as unprecedented over the last 3000 yr. Dataset Arctic Barents Sea Foraminifera* Fram Strait Nordic Seas north atlantic current North Atlantic North Atlantic oscillation Sea ice Svalbard Spitsbergen PANGAEA - Data Publisher for Earth & Environmental Science Arctic Barents Sea Hanssen ENVELOPE(-164.467,-164.467,-85.983,-85.983) Norway Svalbard ENVELOPE(9.887500,9.887500,77.599330,77.599330) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BC Box corer Helmer Hanssen HH11 HH11-134-BC HH2011 North Atlantic |
spellingShingle |
BC Box corer Helmer Hanssen HH11 HH11-134-BC HH2011 North Atlantic Dylmer, Christian Valdemar Giraudeau, Jacques Eynaud, Frédérique Husum, Katrine de Vernal, Anne Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
topic_facet |
BC Box corer Helmer Hanssen HH11 HH11-134-BC HH2011 North Atlantic |
description |
Three marine sediment cores distributed along the Norwegian (MD95-2011), Barents Sea (JM09-KA11-GC), and Svalbard (HH11-134-BC) continental margins have been investigated in order to reconstruct changes in the poleward flow of Atlantic waters (AW) and in the nature of upper surface water masses within the eastern Nordic Seas over the last 3000 yr. These reconstructions are based on a limited set of coccolith proxies: the abundance ratio between Emiliania huxleyi and Coccolithus pelagicus, an index of Atlantic vs. Polar/Arctic surface water masses; and Gephyrocapsa muellerae, a drifted coccolith species from the temperate North Atlantic, whose abundance changes are related to variations in the strength of the North Atlantic Current. The entire investigated area, from 66 to 77° N, was affected by an overall increase in AW flow from 3000 cal yr BP (before present) to the present. The long-term modulation of westerlies' strength and location, which are essentially driven by the dominant mode of the North Atlantic Oscillation (NAO), is thought to explain the observed dynamics of poleward AW flow. The same mechanism also reconciles the recorded opposite zonal shifts in the location of the Arctic front between the area off western Norway and the western Barents Sea-eastern Fram Strait region. The Little Ice Age (LIA) was governed by deteriorating conditions, with Arctic/Polar waters dominating in the surface off western Svalbard and western Barents Sea, possibly associated with both severe sea ice conditions and a strongly reduced AW strength. A sudden short pulse of resumed high WSC (West Spitsbergen Current) flow interrupted this cold spell in eastern Fram Strait from 330 to 410 cal yr BP. Our dataset not only confirms the high amplitude warming of surface waters at the turn of the 19th century off western Svalbard, it also shows that such a warming was primarily induced by an excess flow of AW which stands as unprecedented over the last 3000 yr. |
format |
Dataset |
author |
Dylmer, Christian Valdemar Giraudeau, Jacques Eynaud, Frédérique Husum, Katrine de Vernal, Anne |
author_facet |
Dylmer, Christian Valdemar Giraudeau, Jacques Eynaud, Frédérique Husum, Katrine de Vernal, Anne |
author_sort |
Dylmer, Christian Valdemar |
title |
Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
title_short |
Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
title_full |
Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
title_fullStr |
Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
title_full_unstemmed |
Age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core HH11-134-BC, from the west Spitsbergen slope |
title_sort |
age determinations, dinoflagellate cyst and subpolar foraminifera measurements from sediment core hh11-134-bc, from the west spitsbergen slope |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.842591 https://doi.org/10.1594/PANGAEA.842591 |
op_coverage |
LATITUDE: 77.599330 * LONGITUDE: 9.887500 |
long_lat |
ENVELOPE(-164.467,-164.467,-85.983,-85.983) ENVELOPE(9.887500,9.887500,77.599330,77.599330) |
geographic |
Arctic Barents Sea Hanssen Norway Svalbard |
geographic_facet |
Arctic Barents Sea Hanssen Norway Svalbard |
genre |
Arctic Barents Sea Foraminifera* Fram Strait Nordic Seas north atlantic current North Atlantic North Atlantic oscillation Sea ice Svalbard Spitsbergen |
genre_facet |
Arctic Barents Sea Foraminifera* Fram Strait Nordic Seas north atlantic current North Atlantic North Atlantic oscillation Sea ice Svalbard Spitsbergen |
op_source |
Supplement to: Dylmer, Christian Valdemar; Giraudeau, Jacques; Eynaud, Frédérique; Husum, Katrine; de Vernal, Anne (2013): Northward advection of Atlantic water in the eastern Nordic Seas over the last 3000 yr. Climate of the Past, 9(4), 1505-1518, https://doi.org/10.5194/cp-9-1505-2013 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.842591 https://doi.org/10.1594/PANGAEA.842591 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.842591 https://doi.org/10.5194/cp-9-1505-2013 |
_version_ |
1766330176767000576 |