Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C
Baffin Bay is a semi-enclosed basin connecting the Arctic Ocean and the western North Atlantic, thus making out a significant pathway for heat exchange. Here we reconstruct the alternating advection of relatively warmer and saline Atlantic waters versus the incursion of colder Arctic water masses en...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.920240 2024-09-15T17:52:14+00:00 Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C Hansen, Katrine Elnegaard Giraudeau, Jacques Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig LATITUDE: 73.261050 * LONGITUDE: -57.899780 * DATE/TIME START: 2014-07-28T00:00:00 * DATE/TIME END: 2014-07-28T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.045 m * MAXIMUM DEPTH, sediment/rock: 7.375 m 2020 text/tab-separated-values, 2106 data points https://doi.pangaea.de/10.1594/PANGAEA.920240 https://doi.org/10.1594/PANGAEA.920240 en eng PANGAEA Hansen, Katrine Elnegaard; Giraudeau, Jacques; Wacker, Lukas; Pearce, Christof; Seidenkrantz, Marit-Solveig (2020): Reconstruction of Holocene oceanographic conditions in eastern Baffin Bay. Climate of the Past, 16(3), 1075-1095, https://doi.org/10.5194/cp-16-1075-2020 https://doi.pangaea.de/10.1594/PANGAEA.920240 https://doi.org/10.1594/PANGAEA.920240 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess AGE AMD14_1b AMD14-204_CASQ AMD14-204C ArcticNet Astrononion gallowayi Baffin Bay Benthic foraminifera Bolivina pseudopunctata Buliminella elegantissima Calypso square corer CASQ Cassidulina neoteretis Cassidulina reniforme CCGS Amundsen DEPTH sediment/rock Elphidium clavatum Epistominella arctica Epistominella vitrea Foraminifera benthic benthic agglutinated benthic atlantic species benthic calcareous planktic sea ice species Holocene Islandiella norcrossi Nonionellina labradorica Portatrochammina bipolaris Psammosphaera fusca Ratio Recurvoides trochamminiformis Reophax subfusiformis Stainforthia feylingi Textularia earlandi Textularia kattegatensis Textularia torquata dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.92024010.5194/cp-16-1075-2020 2024-07-24T02:31:34Z Baffin Bay is a semi-enclosed basin connecting the Arctic Ocean and the western North Atlantic, thus making out a significant pathway for heat exchange. Here we reconstruct the alternating advection of relatively warmer and saline Atlantic waters versus the incursion of colder Arctic water masses entering Baffin Bay through the multiple gateways in the Canadian Arctic Archipelago and the Nares Strait during the Holocene. We carried out benthic foraminiferal assemblage analyses, X-ray fluorescence scanning, and radiocarbon dating of a 738 cm long marine sediment core retrieved from eastern Baffin Bay near Upernavik, Greenland (Core AMD14-204C; 987m water depth). Results reveal that eastern Baffin Bay was subjected to several oceanographic changes during the last 9.2 kyrCE1. Waning deglacial conditions with enhanced meltwater influxes and an extensive sea-ice cover prevailed in eastern Baffin Bay from 9.2 to 7.9 ka. A transition towards bottom water amelioration is recorded at 7.9 ka by increased advection of Atlantic water masses, encompassing the Holocene Thermal Maximum. A cold period with growing sea-ice cover at 6.7 ka interrupts the overall warm subsurface water conditions, promoted by a weaker northward flow of Atlantic waters. The onset of the neoglaciation at ca. 2.9 ka is marked by an abrupt transition towards a benthic fauna dominated by agglutinated species, likely in part explained by a reduction of the influx of Atlantic Water, allowing an increased influx of the cold, corrosive Baffin Bay Deep Water originating from the Arctic Ocean to enter Baffin Bay through the Nares Strait. These cold subsurface water conditions persisted throughout the Late Holocene, only interrupted by short-lived warmings superimposed on this cooling trend. Dataset Arctic Archipelago Arctic Ocean ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Foraminifera* Greenland Nares strait North Atlantic Sea ice Upernavik PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-57.899780,-57.899780,73.261050,73.261050) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AGE AMD14_1b AMD14-204_CASQ AMD14-204C ArcticNet Astrononion gallowayi Baffin Bay Benthic foraminifera Bolivina pseudopunctata Buliminella elegantissima Calypso square corer CASQ Cassidulina neoteretis Cassidulina reniforme CCGS Amundsen DEPTH sediment/rock Elphidium clavatum Epistominella arctica Epistominella vitrea Foraminifera benthic benthic agglutinated benthic atlantic species benthic calcareous planktic sea ice species Holocene Islandiella norcrossi Nonionellina labradorica Portatrochammina bipolaris Psammosphaera fusca Ratio Recurvoides trochamminiformis Reophax subfusiformis Stainforthia feylingi Textularia earlandi Textularia kattegatensis Textularia torquata |
spellingShingle |
AGE AMD14_1b AMD14-204_CASQ AMD14-204C ArcticNet Astrononion gallowayi Baffin Bay Benthic foraminifera Bolivina pseudopunctata Buliminella elegantissima Calypso square corer CASQ Cassidulina neoteretis Cassidulina reniforme CCGS Amundsen DEPTH sediment/rock Elphidium clavatum Epistominella arctica Epistominella vitrea Foraminifera benthic benthic agglutinated benthic atlantic species benthic calcareous planktic sea ice species Holocene Islandiella norcrossi Nonionellina labradorica Portatrochammina bipolaris Psammosphaera fusca Ratio Recurvoides trochamminiformis Reophax subfusiformis Stainforthia feylingi Textularia earlandi Textularia kattegatensis Textularia torquata Hansen, Katrine Elnegaard Giraudeau, Jacques Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
topic_facet |
AGE AMD14_1b AMD14-204_CASQ AMD14-204C ArcticNet Astrononion gallowayi Baffin Bay Benthic foraminifera Bolivina pseudopunctata Buliminella elegantissima Calypso square corer CASQ Cassidulina neoteretis Cassidulina reniforme CCGS Amundsen DEPTH sediment/rock Elphidium clavatum Epistominella arctica Epistominella vitrea Foraminifera benthic benthic agglutinated benthic atlantic species benthic calcareous planktic sea ice species Holocene Islandiella norcrossi Nonionellina labradorica Portatrochammina bipolaris Psammosphaera fusca Ratio Recurvoides trochamminiformis Reophax subfusiformis Stainforthia feylingi Textularia earlandi Textularia kattegatensis Textularia torquata |
description |
Baffin Bay is a semi-enclosed basin connecting the Arctic Ocean and the western North Atlantic, thus making out a significant pathway for heat exchange. Here we reconstruct the alternating advection of relatively warmer and saline Atlantic waters versus the incursion of colder Arctic water masses entering Baffin Bay through the multiple gateways in the Canadian Arctic Archipelago and the Nares Strait during the Holocene. We carried out benthic foraminiferal assemblage analyses, X-ray fluorescence scanning, and radiocarbon dating of a 738 cm long marine sediment core retrieved from eastern Baffin Bay near Upernavik, Greenland (Core AMD14-204C; 987m water depth). Results reveal that eastern Baffin Bay was subjected to several oceanographic changes during the last 9.2 kyrCE1. Waning deglacial conditions with enhanced meltwater influxes and an extensive sea-ice cover prevailed in eastern Baffin Bay from 9.2 to 7.9 ka. A transition towards bottom water amelioration is recorded at 7.9 ka by increased advection of Atlantic water masses, encompassing the Holocene Thermal Maximum. A cold period with growing sea-ice cover at 6.7 ka interrupts the overall warm subsurface water conditions, promoted by a weaker northward flow of Atlantic waters. The onset of the neoglaciation at ca. 2.9 ka is marked by an abrupt transition towards a benthic fauna dominated by agglutinated species, likely in part explained by a reduction of the influx of Atlantic Water, allowing an increased influx of the cold, corrosive Baffin Bay Deep Water originating from the Arctic Ocean to enter Baffin Bay through the Nares Strait. These cold subsurface water conditions persisted throughout the Late Holocene, only interrupted by short-lived warmings superimposed on this cooling trend. |
format |
Dataset |
author |
Hansen, Katrine Elnegaard Giraudeau, Jacques Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig |
author_facet |
Hansen, Katrine Elnegaard Giraudeau, Jacques Wacker, Lukas Pearce, Christof Seidenkrantz, Marit-Solveig |
author_sort |
Hansen, Katrine Elnegaard |
title |
Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
title_short |
Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
title_full |
Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
title_fullStr |
Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
title_full_unstemmed |
Benthic foraminiferal abundances from eastern Baffin Bay, sediment core AMD14-204C |
title_sort |
benthic foraminiferal abundances from eastern baffin bay, sediment core amd14-204c |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.920240 https://doi.org/10.1594/PANGAEA.920240 |
op_coverage |
LATITUDE: 73.261050 * LONGITUDE: -57.899780 * DATE/TIME START: 2014-07-28T00:00:00 * DATE/TIME END: 2014-07-28T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.045 m * MAXIMUM DEPTH, sediment/rock: 7.375 m |
long_lat |
ENVELOPE(-57.899780,-57.899780,73.261050,73.261050) |
genre |
Arctic Archipelago Arctic Ocean ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Foraminifera* Greenland Nares strait North Atlantic Sea ice Upernavik |
genre_facet |
Arctic Archipelago Arctic Ocean ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Foraminifera* Greenland Nares strait North Atlantic Sea ice Upernavik |
op_relation |
Hansen, Katrine Elnegaard; Giraudeau, Jacques; Wacker, Lukas; Pearce, Christof; Seidenkrantz, Marit-Solveig (2020): Reconstruction of Holocene oceanographic conditions in eastern Baffin Bay. Climate of the Past, 16(3), 1075-1095, https://doi.org/10.5194/cp-16-1075-2020 https://doi.pangaea.de/10.1594/PANGAEA.920240 https://doi.org/10.1594/PANGAEA.920240 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.92024010.5194/cp-16-1075-2020 |
_version_ |
1810294299906015232 |