Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study
Reconstructions of sea-surface conditions during the Holocene were achieved using three sediment cores from northeastern Baffin Bay (GeoB19948-3 and GeoB19927-3) and the Labrador Sea (GeoB19905-1) along a north– south transect based on sea-ice IP25 and open-water phytoplankton biomarkers (brassicast...
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WILEY-BLACKWELL PUBLISHING
2022
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Online Access: | https://epic.awi.de/id/eprint/55690/ https://hdl.handle.net/10013/epic.dc611a08-c590-45cf-ba42-063051089014 |
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ftawi:oai:epic.awi.de:55690 2024-09-15T17:56:54+00:00 Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study Saini, Jeetendra Stein, Rüdiger Fahl, Kirsten Weiser, Jens Hebbeln, Dierk Madaj, Lina 2022-02-10 https://epic.awi.de/id/eprint/55690/ https://hdl.handle.net/10013/epic.dc611a08-c590-45cf-ba42-063051089014 unknown WILEY-BLACKWELL PUBLISHING Saini, J. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 , Weiser, J. , Hebbeln, D. and Madaj, L. (2022) Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study , Boreas, pp. 1-20 . doi:10.1111/bor.12583 <https://doi.org/10.1111/bor.12583> , hdl:10013/epic.dc611a08-c590-45cf-ba42-063051089014 EPIC3Boreas, WILEY-BLACKWELL PUBLISHING, pp. 1-20, ISSN: 0300-9483 Article isiRev 2022 ftawi https://doi.org/10.1111/bor.12583 2024-06-24T04:28:46Z Reconstructions of sea-surface conditions during the Holocene were achieved using three sediment cores from northeastern Baffin Bay (GeoB19948-3 and GeoB19927-3) and the Labrador Sea (GeoB19905-1) along a north– south transect based on sea-ice IP25 and open-water phytoplankton biomarkers (brassicasterol, dinosterol and HBI III). In Baffin Bay, sea-surface conditions in the Early Holocene were characterized by extended (early) spring sea ice cover (SIC) prior to 7.6 ka BP. The conditions in the NE Labrador Sea, however, remained predominantly ice-free in spring/autumn due to the enhanced influx of Atlantic Water (West Greenland Current,WGC) from11.5 until ~9.1 ka BP, succeeded by a period of continued (spring–autumn) ice-free conditions between 9.1 and 7.6 ka BP corresponding to the onset of Holocene Thermal Maximum (HTM)-like conditions. A transition towards reoccurring ice-edge and significantly reduced SIC conditions in Baffin Bay is evident in the Middle Holocene (~7.6–3 ka BP) probably caused by the variations in the WGC influence associated with the ice melting and can be characterized as HTM-like conditions. These HTM-like conditions are predominantly recorded in the NE Labrador Sea area shown by (spring– autumn) ice-free conditions from 5.9–3 ka BP. In the Late Holocene (last ~3 ka), our combined proxy records from eastern Baffin Bay indicate low in-situ ice algae production; however, enhanced multi-year (drifted) sea ice in this area was possibly attributed to the increased influx of Polar Water mass influx and may correlate with the Neoglacial cooling. The conditions in the NE Labrador Sea during the last 3 ka, however, continued to remain (spring–autumn) ice-free. Our data from the Baffin Bay–Labrador Sea transect suggest a dominant influence of meltwater influx on sea ice formation throughout the Holocene, in contrast to sea-ice records from the Fram Strait area,which seem to follow predominantly the summer insolation trend. Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Fram Strait Greenland ice algae Labrador Sea Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Boreas |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Reconstructions of sea-surface conditions during the Holocene were achieved using three sediment cores from northeastern Baffin Bay (GeoB19948-3 and GeoB19927-3) and the Labrador Sea (GeoB19905-1) along a north– south transect based on sea-ice IP25 and open-water phytoplankton biomarkers (brassicasterol, dinosterol and HBI III). In Baffin Bay, sea-surface conditions in the Early Holocene were characterized by extended (early) spring sea ice cover (SIC) prior to 7.6 ka BP. The conditions in the NE Labrador Sea, however, remained predominantly ice-free in spring/autumn due to the enhanced influx of Atlantic Water (West Greenland Current,WGC) from11.5 until ~9.1 ka BP, succeeded by a period of continued (spring–autumn) ice-free conditions between 9.1 and 7.6 ka BP corresponding to the onset of Holocene Thermal Maximum (HTM)-like conditions. A transition towards reoccurring ice-edge and significantly reduced SIC conditions in Baffin Bay is evident in the Middle Holocene (~7.6–3 ka BP) probably caused by the variations in the WGC influence associated with the ice melting and can be characterized as HTM-like conditions. These HTM-like conditions are predominantly recorded in the NE Labrador Sea area shown by (spring– autumn) ice-free conditions from 5.9–3 ka BP. In the Late Holocene (last ~3 ka), our combined proxy records from eastern Baffin Bay indicate low in-situ ice algae production; however, enhanced multi-year (drifted) sea ice in this area was possibly attributed to the increased influx of Polar Water mass influx and may correlate with the Neoglacial cooling. The conditions in the NE Labrador Sea during the last 3 ka, however, continued to remain (spring–autumn) ice-free. Our data from the Baffin Bay–Labrador Sea transect suggest a dominant influence of meltwater influx on sea ice formation throughout the Holocene, in contrast to sea-ice records from the Fram Strait area,which seem to follow predominantly the summer insolation trend. |
format |
Article in Journal/Newspaper |
author |
Saini, Jeetendra Stein, Rüdiger Fahl, Kirsten Weiser, Jens Hebbeln, Dierk Madaj, Lina |
spellingShingle |
Saini, Jeetendra Stein, Rüdiger Fahl, Kirsten Weiser, Jens Hebbeln, Dierk Madaj, Lina Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
author_facet |
Saini, Jeetendra Stein, Rüdiger Fahl, Kirsten Weiser, Jens Hebbeln, Dierk Madaj, Lina |
author_sort |
Saini, Jeetendra |
title |
Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
title_short |
Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
title_full |
Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
title_fullStr |
Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
title_full_unstemmed |
Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study |
title_sort |
holocene variability in sea-ice conditions in the eastern baffin bay-labrador sea – a north–south biomarker transect study |
publisher |
WILEY-BLACKWELL PUBLISHING |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/55690/ https://hdl.handle.net/10013/epic.dc611a08-c590-45cf-ba42-063051089014 |
genre |
Baffin Bay Baffin Bay Baffin Fram Strait Greenland ice algae Labrador Sea Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Fram Strait Greenland ice algae Labrador Sea Sea ice |
op_source |
EPIC3Boreas, WILEY-BLACKWELL PUBLISHING, pp. 1-20, ISSN: 0300-9483 |
op_relation |
Saini, J. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 , Weiser, J. , Hebbeln, D. and Madaj, L. (2022) Holocene variability in sea-ice conditions in the eastern Baffin Bay-Labrador Sea – A north–south biomarker transect study , Boreas, pp. 1-20 . doi:10.1111/bor.12583 <https://doi.org/10.1111/bor.12583> , hdl:10013/epic.dc611a08-c590-45cf-ba42-063051089014 |
op_doi |
https://doi.org/10.1111/bor.12583 |
container_title |
Boreas |
_version_ |
1810433075410108416 |