Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years
Climate warming is rapidly reshaping the Arctic cryosphere and ocean conditions, with consequences for sea ice and pelagic productivity patterns affecting the entire marine food web. To predict how ongoing changes will impact Arctic marine ecosystems, concerted effort from various disciplines is req...
Published in: | Global Change Biology |
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Language: | English |
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/189138 https://hdl.handle.net/20.500.12278/189138 https://doi.org/10.1111/gcb.15334 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/189138 2024-04-28T08:05:30+00:00 Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years LIMOGES, Audrey WECKSTRÖM, Kaarina RIBEIRO, Sofia GEORGIADIS, Eleanor HANSEN, Katrine Elnegaard MARTINEZ, Philippe SEIDENKRANTZ, Marit-Solveig GIRAUDEAU, Jacques CROSTA, Xavier MASSÉ, Guillaume 2020 https://oskar-bordeaux.fr/handle/20.500.12278/189138 https://hdl.handle.net/20.500.12278/189138 https://doi.org/10.1111/gcb.15334 EN eng 1354-1013 https://oskar-bordeaux.fr/handle/20.500.12278/189138 doi:10.1111/gcb.15334 open Pas de Licence CC diatoms highly branched isoprenoid (HBI) biomarkers marine sediment phytoplankton paleoceanography Arctic Oscillation Baffin Bay climate change Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences du Vivant [q-bio]/Ecologie Environnement/Bioclimatologie Article de revue 2020 ftoskarbordeaux https://doi.org/20.500.12278/18913810.1111/gcb.15334 2024-04-08T14:50:49Z Climate warming is rapidly reshaping the Arctic cryosphere and ocean conditions, with consequences for sea ice and pelagic productivity patterns affecting the entire marine food web. To predict how ongoing changes will impact Arctic marine ecosystems, concerted effort from various disciplines is required. Here, we contribute multi-decadal reconstructions of changes in diatom production and sea-ice conditions in relation to Holocene climate and ocean conditions off Northwest Greenland. Our multiproxy study includes diatoms, sea-ice biomarkers (IP 25 and HBI III) and geochemical tracers (TOC, TOC:TN, δ 13 C, δ 15 N) from a sediment core record spanning the last ca. 9000 years. Our results suggest that the balance between the outflow of polar water from the Arctic, and input of Atlantic water from the Irminger Current into the West Greenland Current is a key factor in controlling sea-ice conditions, and both diatom phenology and production in northeastern Baffin Bay. Our proxy record notably shows that changes in sea-surface conditions initially forced by Neoglacial cooling were dynamically amplified by the shift in the dominant phase of the Arctic Oscillation (AO) mode that occurred at ca. 3000 yrs BP, and caused drastic changes in community composition and a decline in diatom production at the study site. In the future, with projected dominant positive AO conditions favored by Arctic warming, increased water column stratification may counteract the positive effect of a longer open-water growth season and negatively impact diatom production. Article in Journal/Newspaper arctic cryosphere Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland Phytoplankton Sea ice OSKAR Bordeaux (Open Science Knowledge ARchive) Global Change Biology 26 12 6767 6786 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
diatoms highly branched isoprenoid (HBI) biomarkers marine sediment phytoplankton paleoceanography Arctic Oscillation Baffin Bay climate change Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences du Vivant [q-bio]/Ecologie Environnement/Bioclimatologie |
spellingShingle |
diatoms highly branched isoprenoid (HBI) biomarkers marine sediment phytoplankton paleoceanography Arctic Oscillation Baffin Bay climate change Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences du Vivant [q-bio]/Ecologie Environnement/Bioclimatologie LIMOGES, Audrey WECKSTRÖM, Kaarina RIBEIRO, Sofia GEORGIADIS, Eleanor HANSEN, Katrine Elnegaard MARTINEZ, Philippe SEIDENKRANTZ, Marit-Solveig GIRAUDEAU, Jacques CROSTA, Xavier MASSÉ, Guillaume Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
topic_facet |
diatoms highly branched isoprenoid (HBI) biomarkers marine sediment phytoplankton paleoceanography Arctic Oscillation Baffin Bay climate change Planète et Univers [physics]/Sciences de la Terre/Océanographie Sciences du Vivant [q-bio]/Ecologie Environnement/Bioclimatologie |
description |
Climate warming is rapidly reshaping the Arctic cryosphere and ocean conditions, with consequences for sea ice and pelagic productivity patterns affecting the entire marine food web. To predict how ongoing changes will impact Arctic marine ecosystems, concerted effort from various disciplines is required. Here, we contribute multi-decadal reconstructions of changes in diatom production and sea-ice conditions in relation to Holocene climate and ocean conditions off Northwest Greenland. Our multiproxy study includes diatoms, sea-ice biomarkers (IP 25 and HBI III) and geochemical tracers (TOC, TOC:TN, δ 13 C, δ 15 N) from a sediment core record spanning the last ca. 9000 years. Our results suggest that the balance between the outflow of polar water from the Arctic, and input of Atlantic water from the Irminger Current into the West Greenland Current is a key factor in controlling sea-ice conditions, and both diatom phenology and production in northeastern Baffin Bay. Our proxy record notably shows that changes in sea-surface conditions initially forced by Neoglacial cooling were dynamically amplified by the shift in the dominant phase of the Arctic Oscillation (AO) mode that occurred at ca. 3000 yrs BP, and caused drastic changes in community composition and a decline in diatom production at the study site. In the future, with projected dominant positive AO conditions favored by Arctic warming, increased water column stratification may counteract the positive effect of a longer open-water growth season and negatively impact diatom production. |
format |
Article in Journal/Newspaper |
author |
LIMOGES, Audrey WECKSTRÖM, Kaarina RIBEIRO, Sofia GEORGIADIS, Eleanor HANSEN, Katrine Elnegaard MARTINEZ, Philippe SEIDENKRANTZ, Marit-Solveig GIRAUDEAU, Jacques CROSTA, Xavier MASSÉ, Guillaume |
author_facet |
LIMOGES, Audrey WECKSTRÖM, Kaarina RIBEIRO, Sofia GEORGIADIS, Eleanor HANSEN, Katrine Elnegaard MARTINEZ, Philippe SEIDENKRANTZ, Marit-Solveig GIRAUDEAU, Jacques CROSTA, Xavier MASSÉ, Guillaume |
author_sort |
LIMOGES, Audrey |
title |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
title_short |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
title_full |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
title_fullStr |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
title_full_unstemmed |
Learning from the past: Impact of the Arctic Oscillation on sea ice and marine productivity off northwest Greenland over the last 9,000 years |
title_sort |
learning from the past: impact of the arctic oscillation on sea ice and marine productivity off northwest greenland over the last 9,000 years |
publishDate |
2020 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/189138 https://hdl.handle.net/20.500.12278/189138 https://doi.org/10.1111/gcb.15334 |
genre |
arctic cryosphere Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland Phytoplankton Sea ice |
genre_facet |
arctic cryosphere Arctic Baffin Bay Baffin Bay Baffin Climate change Greenland Phytoplankton Sea ice |
op_relation |
1354-1013 https://oskar-bordeaux.fr/handle/20.500.12278/189138 doi:10.1111/gcb.15334 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/18913810.1111/gcb.15334 |
container_title |
Global Change Biology |
container_volume |
26 |
container_issue |
12 |
container_start_page |
6767 |
op_container_end_page |
6786 |
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1797575504179494912 |