Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition
Late Quaternary paleoceanographic changes at the Lomonosov Ridge, central Arctic Ocean, were reconstructed from a multicore and gravity core recovered during the 2014 SWERUS-C3 Expedition. Ostracode assemblages dated by accelerator mass spectrometry (AMS) indicate changing sea-ice conditions and war...
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Online Access: | https://doi.org/10.5194/cp-13-1473-2017 https://doaj.org/article/d3e4541dcb584f69b1da3accf053a975 |
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ftdoajarticles:oai:doaj.org/article:d3e4541dcb584f69b1da3accf053a975 2023-05-15T14:49:20+02:00 Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition L. Gemery T. M. Cronin R. K. Poirier C. Pearce N. Barrientos M. O'Regan C. Johansson A. Koshurnikov M. Jakobsson 2017-11-01T00:00:00Z https://doi.org/10.5194/cp-13-1473-2017 https://doaj.org/article/d3e4541dcb584f69b1da3accf053a975 EN eng Copernicus Publications https://www.clim-past.net/13/1473/2017/cp-13-1473-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1473-2017 1814-9324 1814-9332 https://doaj.org/article/d3e4541dcb584f69b1da3accf053a975 Climate of the Past, Vol 13, Pp 1473-1489 (2017) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2017 ftdoajarticles https://doi.org/10.5194/cp-13-1473-2017 2022-12-31T16:11:33Z Late Quaternary paleoceanographic changes at the Lomonosov Ridge, central Arctic Ocean, were reconstructed from a multicore and gravity core recovered during the 2014 SWERUS-C3 Expedition. Ostracode assemblages dated by accelerator mass spectrometry (AMS) indicate changing sea-ice conditions and warm Atlantic Water (AW) inflow to the Arctic Ocean from ∼ 50 ka to present. Key taxa used as environmental indicators include Acetabulastoma arcticum (perennial sea ice), Polycope spp. (variable sea-ice margins, high surface productivity), Krithe hunti (Arctic Ocean deep water), and Rabilimis mirabilis (water mass change/AW inflow). Results indicate periodic seasonally sea-ice-free conditions during Marine Isotope Stage (MIS) 3 ( ∼ 57–29 ka), rapid deglacial changes in water mass conditions (15–11 ka), seasonally sea-ice-free conditions during the early Holocene ( ∼ 10–7 ka) and perennial sea ice during the late Holocene. Comparisons with faunal records from other cores from the Mendeleev and Lomonosov ridges suggest generally similar patterns, although sea-ice cover during the Last Glacial Maximum may have been less extensive at the new Lomonosov Ridge core site ( ∼ 85.15° N, 152° E) than farther north and towards Greenland. The new data provide evidence for abrupt, large-scale shifts in ostracode species depth and geographical distributions during rapid climatic transitions. Article in Journal/Newspaper Arctic Arctic Ocean Greenland Lomonosov Ridge Sea ice SWERUS-C3 Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Greenland Climate of the Past 13 11 1473 1489 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 L. Gemery T. M. Cronin R. K. Poirier C. Pearce N. Barrientos M. O'Regan C. Johansson A. Koshurnikov M. Jakobsson Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Late Quaternary paleoceanographic changes at the Lomonosov Ridge, central Arctic Ocean, were reconstructed from a multicore and gravity core recovered during the 2014 SWERUS-C3 Expedition. Ostracode assemblages dated by accelerator mass spectrometry (AMS) indicate changing sea-ice conditions and warm Atlantic Water (AW) inflow to the Arctic Ocean from ∼ 50 ka to present. Key taxa used as environmental indicators include Acetabulastoma arcticum (perennial sea ice), Polycope spp. (variable sea-ice margins, high surface productivity), Krithe hunti (Arctic Ocean deep water), and Rabilimis mirabilis (water mass change/AW inflow). Results indicate periodic seasonally sea-ice-free conditions during Marine Isotope Stage (MIS) 3 ( ∼ 57–29 ka), rapid deglacial changes in water mass conditions (15–11 ka), seasonally sea-ice-free conditions during the early Holocene ( ∼ 10–7 ka) and perennial sea ice during the late Holocene. Comparisons with faunal records from other cores from the Mendeleev and Lomonosov ridges suggest generally similar patterns, although sea-ice cover during the Last Glacial Maximum may have been less extensive at the new Lomonosov Ridge core site ( ∼ 85.15° N, 152° E) than farther north and towards Greenland. The new data provide evidence for abrupt, large-scale shifts in ostracode species depth and geographical distributions during rapid climatic transitions. |
format |
Article in Journal/Newspaper |
author |
L. Gemery T. M. Cronin R. K. Poirier C. Pearce N. Barrientos M. O'Regan C. Johansson A. Koshurnikov M. Jakobsson |
author_facet |
L. Gemery T. M. Cronin R. K. Poirier C. Pearce N. Barrientos M. O'Regan C. Johansson A. Koshurnikov M. Jakobsson |
author_sort |
L. Gemery |
title |
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
title_short |
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
title_full |
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
title_fullStr |
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
title_full_unstemmed |
Central Arctic Ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the SWERUS 2014 expedition |
title_sort |
central arctic ocean paleoceanography from ∼ 50 ka to present, on the basis of ostracode faunal assemblages from the swerus 2014 expedition |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-1473-2017 https://doaj.org/article/d3e4541dcb584f69b1da3accf053a975 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Greenland Lomonosov Ridge Sea ice SWERUS-C3 |
genre_facet |
Arctic Arctic Ocean Greenland Lomonosov Ridge Sea ice SWERUS-C3 |
op_source |
Climate of the Past, Vol 13, Pp 1473-1489 (2017) |
op_relation |
https://www.clim-past.net/13/1473/2017/cp-13-1473-2017.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-13-1473-2017 1814-9324 1814-9332 https://doaj.org/article/d3e4541dcb584f69b1da3accf053a975 |
op_doi |
https://doi.org/10.5194/cp-13-1473-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
11 |
container_start_page |
1473 |
op_container_end_page |
1489 |
_version_ |
1766320394382344192 |