Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge
Expansion of fresh and sea-ice loaded surface waters from the Arctic Ocean into the sub-polar North Atlantic is suggested to modulate the northward heat transport within the North Atlantic Current (NAC). The Reykjanes Ridge south of Iceland is a suitable area to reconstruct changes in the mid- to la...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.898398 2023-05-15T15:18:38+02:00 Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge Perner, Kerstin Moros, Matthias Jansen, Eystein Kuijpers, Antoon Troelstra, Simon Prins, Maarten Arnoud MEDIAN LATITUDE: 58.922750 * MEDIAN LONGITUDE: -30.827100 * SOUTH-BOUND LATITUDE: 58.912200 * WEST-BOUND LONGITUDE: -31.254200 * NORTH-BOUND LATITUDE: 58.933300 * EAST-BOUND LONGITUDE: -30.400000 * DATE/TIME START: 1997-08-31T00:00:00 * DATE/TIME END: 1997-08-31T00:00:00 2019-02-14 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.898398 https://doi.org/10.1594/PANGAEA.898398 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.898398 https://doi.org/10.1594/PANGAEA.898398 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Perner, Kerstin; Moros, Matthias; Jansen, Eystein; Kuijpers, Antoon; Troelstra, Simon; Prins, Maarten Arnoud (2018): Subarctic Front migration at the Reykjanes Ridge during the mid- to late Holocene: evidence from planktic foraminifera. Boreas, 47(1), 175-188, https://doi.org/10.1111/bor.12263 GREENClim Holocene planktic foraminifera Reykjanes Ridge Stable isotopes Subarctic Front Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.898398 https://doi.org/10.1111/bor.12263 2023-01-20T07:34:17Z Expansion of fresh and sea-ice loaded surface waters from the Arctic Ocean into the sub-polar North Atlantic is suggested to modulate the northward heat transport within the North Atlantic Current (NAC). The Reykjanes Ridge south of Iceland is a suitable area to reconstruct changes in the mid- to late Holocene fresh and sea-ice loaded surface water expansion, which is marked by the Subarctic Front (SAF). Here, shifts in the location of the SAF result from the interaction of freshwater expansion and inflow of warmer and saline (NAC) waters to the Ridge. Using planktic foraminiferal assemblage and concentration data from a marine sediment core on the eastern Reykjanes Ridge elucidates SAF location changes and thus, changes in the water-mass composition (upper ~200 m) during the last c. 5.8 ka BP. Our foraminifer data highlight a late Holocene shift (at c. 3.0 ka BP) in water-mass composition at the Reykjanes Ridge, which reflects the occurrence of cooler and fresher surface waters when compared to the mid-Holocene. We document two phases of SAF presence at the study site: from (i) c. 5.5 to 5.0 ka BP and (ii) c. 2.7 to 1.5 ka BP. Both phases are characterized by marked increases in the planktic foraminiferal concentration, which coincides with freshwater expansions and warm subsurface water conditions within the sub-polar North Atlantic. We link the SAF changes, from c. 2.7 to 1.5 ka BP, to a strengthening of the East Greenland Current and awarming in the NAC, as identified by various studies underlying these two currents. From c. 1.5 ka BP onwards, we record a prominent subsurface cooling and continued occurrence of fresh and sea-ice loaded surface waters at the study site. This implies that the SAF migrated to the southeast of our core site during the last millennium. Dataset Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Greenland Iceland north atlantic current North Atlantic Sea ice Subarctic PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Greenland Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-31.254200,-30.400000,58.933300,58.912200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
GREENClim Holocene planktic foraminifera Reykjanes Ridge Stable isotopes Subarctic Front |
spellingShingle |
GREENClim Holocene planktic foraminifera Reykjanes Ridge Stable isotopes Subarctic Front Perner, Kerstin Moros, Matthias Jansen, Eystein Kuijpers, Antoon Troelstra, Simon Prins, Maarten Arnoud Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
topic_facet |
GREENClim Holocene planktic foraminifera Reykjanes Ridge Stable isotopes Subarctic Front |
description |
Expansion of fresh and sea-ice loaded surface waters from the Arctic Ocean into the sub-polar North Atlantic is suggested to modulate the northward heat transport within the North Atlantic Current (NAC). The Reykjanes Ridge south of Iceland is a suitable area to reconstruct changes in the mid- to late Holocene fresh and sea-ice loaded surface water expansion, which is marked by the Subarctic Front (SAF). Here, shifts in the location of the SAF result from the interaction of freshwater expansion and inflow of warmer and saline (NAC) waters to the Ridge. Using planktic foraminiferal assemblage and concentration data from a marine sediment core on the eastern Reykjanes Ridge elucidates SAF location changes and thus, changes in the water-mass composition (upper ~200 m) during the last c. 5.8 ka BP. Our foraminifer data highlight a late Holocene shift (at c. 3.0 ka BP) in water-mass composition at the Reykjanes Ridge, which reflects the occurrence of cooler and fresher surface waters when compared to the mid-Holocene. We document two phases of SAF presence at the study site: from (i) c. 5.5 to 5.0 ka BP and (ii) c. 2.7 to 1.5 ka BP. Both phases are characterized by marked increases in the planktic foraminiferal concentration, which coincides with freshwater expansions and warm subsurface water conditions within the sub-polar North Atlantic. We link the SAF changes, from c. 2.7 to 1.5 ka BP, to a strengthening of the East Greenland Current and awarming in the NAC, as identified by various studies underlying these two currents. From c. 1.5 ka BP onwards, we record a prominent subsurface cooling and continued occurrence of fresh and sea-ice loaded surface waters at the study site. This implies that the SAF migrated to the southeast of our core site during the last millennium. |
format |
Dataset |
author |
Perner, Kerstin Moros, Matthias Jansen, Eystein Kuijpers, Antoon Troelstra, Simon Prins, Maarten Arnoud |
author_facet |
Perner, Kerstin Moros, Matthias Jansen, Eystein Kuijpers, Antoon Troelstra, Simon Prins, Maarten Arnoud |
author_sort |
Perner, Kerstin |
title |
Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
title_short |
Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
title_full |
Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
title_fullStr |
Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
title_full_unstemmed |
Planktic foraminifera fauna and stable isotope from sediment core DS97-2P and GS06-144 sampled at the Reykjanes Ridge |
title_sort |
planktic foraminifera fauna and stable isotope from sediment core ds97-2p and gs06-144 sampled at the reykjanes ridge |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.898398 https://doi.org/10.1594/PANGAEA.898398 |
op_coverage |
MEDIAN LATITUDE: 58.922750 * MEDIAN LONGITUDE: -30.827100 * SOUTH-BOUND LATITUDE: 58.912200 * WEST-BOUND LONGITUDE: -31.254200 * NORTH-BOUND LATITUDE: 58.933300 * EAST-BOUND LONGITUDE: -30.400000 * DATE/TIME START: 1997-08-31T00:00:00 * DATE/TIME END: 1997-08-31T00:00:00 |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-31.254200,-30.400000,58.933300,58.912200) |
geographic |
Arctic Arctic Ocean Greenland Reykjanes |
geographic_facet |
Arctic Arctic Ocean Greenland Reykjanes |
genre |
Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Greenland Iceland north atlantic current North Atlantic Sea ice Subarctic |
genre_facet |
Arctic Arctic Ocean East Greenland east greenland current Foraminifera* Greenland Iceland north atlantic current North Atlantic Sea ice Subarctic |
op_source |
Supplement to: Perner, Kerstin; Moros, Matthias; Jansen, Eystein; Kuijpers, Antoon; Troelstra, Simon; Prins, Maarten Arnoud (2018): Subarctic Front migration at the Reykjanes Ridge during the mid- to late Holocene: evidence from planktic foraminifera. Boreas, 47(1), 175-188, https://doi.org/10.1111/bor.12263 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.898398 https://doi.org/10.1594/PANGAEA.898398 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.898398 https://doi.org/10.1111/bor.12263 |
_version_ |
1766348827375173632 |