Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice
Antarctic sea-ice extent, primary productivity and ocean circulation represent interconnected systems that form important components of the global carbon cycle. Subdecadal to centennial-scale variability can influence the characteristics and interactions of these systems, but observational records a...
Published in: | Nature Geoscience |
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Main Authors: | , , , , , , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
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Nature Publishing Group
2021
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Online Access: | http://hdl.handle.net/10261/276335 https://doi.org/10.1038/s41561-021-00816-y https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100001691 https://doi.org/10.13039/501100004837 https://doi.org/10.13039/501100001665 |
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Digital.CSIC (Spanish National Research Council) |
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Antarctica East Antarctica Southern Ocean Circulation Climate Holocene Ocean Drilling Program Productivity Sea ice |
spellingShingle |
Antarctica East Antarctica Southern Ocean Circulation Climate Holocene Ocean Drilling Program Productivity Sea ice Johnson, Katelyn M. McKay, Robert M. Etourneau, Johan Jiménez-Espejo, Francisco J. Albot, Anya Riesselman, Christina R. Bertler, Nancy A. N. Horgan, Huw Joseph Crosta, Xavier Bendle, James A. Ashley, Kate E. Yamane, Masako Yokoyama, Yusuke Pekar, Stephen F. Escutia, Carlota Dunbar, Robert B. Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
topic_facet |
Antarctica East Antarctica Southern Ocean Circulation Climate Holocene Ocean Drilling Program Productivity Sea ice |
description |
Antarctic sea-ice extent, primary productivity and ocean circulation represent interconnected systems that form important components of the global carbon cycle. Subdecadal to centennial-scale variability can influence the characteristics and interactions of these systems, but observational records are too short to evaluate the impacts of this variability over longer timescales. Here, we use a 170-m-long sediment core collected from Integrated Ocean Drilling Program Site U1357B, offshore Adélie Land, East Antarctica to disentangle the impacts of sea ice and subdecadal climate variability on phytoplankton bloom frequency over the last ~11,400 years. We apply X-ray computed tomography, Ice Proxy for the Southern Ocean with 25 carbon atoms, diatom, physical property and geochemical analyses to the core, which contains an annually resolved, continuously laminated archive of phytoplankton bloom events. Bloom events occurred annually to biennially through most of the Holocene, but became less frequent (~2–7 years) at ~4.5 ka when coastal sea ice intensified. We propose that coastal sea-ice intensification subdued annual sea-ice break-out, causing an increased sensitivity of sea-ice dynamics to subdecadal climate modes, leading to a subdecadal frequency of bloom events. Our data suggest that projected loss of coastal sea ice will impact the influence of subdecadal variability on Antarctic margin primary productivity, altering food webs and carbon-cycling processes at seasonal timescales. This research used samples and data provided by IODP expedition 318, sponsored by the US National Science Foundation (NSF) and participating countries under the management of the Consortium for Ocean Leadership, including the Australian and New Zealand International Ocean Discovery Program Consortium. Funding was provided by Royal Society Te Apārangi Marsden Fund (18-VUW-089 to R.M.M. and 15-VUW-131 to N.A.N.B.) and the New Zealand Ministry of Business, Innovation and Employment through the Antarctic Science Platform (ANTA1801). ... |
author2 |
Ministerio de Ciencia e Innovación (España) Japan Society for the Promotion of Science European Commission Agence Nationale de la Recherche (France) |
format |
Article in Journal/Newspaper |
author |
Johnson, Katelyn M. McKay, Robert M. Etourneau, Johan Jiménez-Espejo, Francisco J. Albot, Anya Riesselman, Christina R. Bertler, Nancy A. N. Horgan, Huw Joseph Crosta, Xavier Bendle, James A. Ashley, Kate E. Yamane, Masako Yokoyama, Yusuke Pekar, Stephen F. Escutia, Carlota Dunbar, Robert B. |
author_facet |
Johnson, Katelyn M. McKay, Robert M. Etourneau, Johan Jiménez-Espejo, Francisco J. Albot, Anya Riesselman, Christina R. Bertler, Nancy A. N. Horgan, Huw Joseph Crosta, Xavier Bendle, James A. Ashley, Kate E. Yamane, Masako Yokoyama, Yusuke Pekar, Stephen F. Escutia, Carlota Dunbar, Robert B. |
author_sort |
Johnson, Katelyn M. |
title |
Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
title_short |
Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
title_full |
Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
title_fullStr |
Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
title_full_unstemmed |
Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice |
title_sort |
sensitivity of holocene east antarctic productivity to subdecadal variability set by sea ice |
publisher |
Nature Publishing Group |
publishDate |
2021 |
url |
http://hdl.handle.net/10261/276335 https://doi.org/10.1038/s41561-021-00816-y https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100001691 https://doi.org/10.13039/501100004837 https://doi.org/10.13039/501100001665 |
long_lat |
ENVELOPE(66.067,66.067,-67.867,-67.867) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica New Zealand Marsden |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica New Zealand Marsden |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
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#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-1-P/ES/EVENTOS TECTONICOS Y OCEANOGRAFICOS EN EL DESARROLLO DE LA CORRIENTE CIRCUMPOLAR ANTARTICA (ACC) Y SU RELACION CON LA EVOLUCION PALEOCLIMATICA Y DEL CASQUETE DE HIELOS/ info:eu-repo/grantAgreement/EC/FP7/203441 Publisher's version http://dx.doi.org/10.1038/s41561-021-00816-y Sí doi:10.1038/s41561-021-00816-y issn: 1752-0908 Nature Geoscience 14: 762-768 (2021) http://hdl.handle.net/10261/276335 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100001691 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100001665 |
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https://doi.org/10.1038/s41561-021-00816-y10.13039/50110000078010.13039/50110000169110.13039/50110000483710.13039/501100001665 |
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Nature Geoscience |
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ftcsic:oai:digital.csic.es:10261/276335 2024-02-11T09:58:39+01:00 Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice Johnson, Katelyn M. McKay, Robert M. Etourneau, Johan Jiménez-Espejo, Francisco J. Albot, Anya Riesselman, Christina R. Bertler, Nancy A. N. Horgan, Huw Joseph Crosta, Xavier Bendle, James A. Ashley, Kate E. Yamane, Masako Yokoyama, Yusuke Pekar, Stephen F. Escutia, Carlota Dunbar, Robert B. Ministerio de Ciencia e Innovación (España) Japan Society for the Promotion of Science European Commission Agence Nationale de la Recherche (France) 2021-09-09 http://hdl.handle.net/10261/276335 https://doi.org/10.1038/s41561-021-00816-y https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100001691 https://doi.org/10.13039/501100004837 https://doi.org/10.13039/501100001665 unknown Nature Publishing Group #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2017-89711-C2-1-P/ES/EVENTOS TECTONICOS Y OCEANOGRAFICOS EN EL DESARROLLO DE LA CORRIENTE CIRCUMPOLAR ANTARTICA (ACC) Y SU RELACION CON LA EVOLUCION PALEOCLIMATICA Y DEL CASQUETE DE HIELOS/ info:eu-repo/grantAgreement/EC/FP7/203441 Publisher's version http://dx.doi.org/10.1038/s41561-021-00816-y Sí doi:10.1038/s41561-021-00816-y issn: 1752-0908 Nature Geoscience 14: 762-768 (2021) http://hdl.handle.net/10261/276335 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100001691 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100001665 open Antarctica East Antarctica Southern Ocean Circulation Climate Holocene Ocean Drilling Program Productivity Sea ice artículo 2021 ftcsic https://doi.org/10.1038/s41561-021-00816-y10.13039/50110000078010.13039/50110000169110.13039/50110000483710.13039/501100001665 2024-01-16T11:27:28Z Antarctic sea-ice extent, primary productivity and ocean circulation represent interconnected systems that form important components of the global carbon cycle. Subdecadal to centennial-scale variability can influence the characteristics and interactions of these systems, but observational records are too short to evaluate the impacts of this variability over longer timescales. Here, we use a 170-m-long sediment core collected from Integrated Ocean Drilling Program Site U1357B, offshore Adélie Land, East Antarctica to disentangle the impacts of sea ice and subdecadal climate variability on phytoplankton bloom frequency over the last ~11,400 years. We apply X-ray computed tomography, Ice Proxy for the Southern Ocean with 25 carbon atoms, diatom, physical property and geochemical analyses to the core, which contains an annually resolved, continuously laminated archive of phytoplankton bloom events. Bloom events occurred annually to biennially through most of the Holocene, but became less frequent (~2–7 years) at ~4.5 ka when coastal sea ice intensified. We propose that coastal sea-ice intensification subdued annual sea-ice break-out, causing an increased sensitivity of sea-ice dynamics to subdecadal climate modes, leading to a subdecadal frequency of bloom events. Our data suggest that projected loss of coastal sea ice will impact the influence of subdecadal variability on Antarctic margin primary productivity, altering food webs and carbon-cycling processes at seasonal timescales. This research used samples and data provided by IODP expedition 318, sponsored by the US National Science Foundation (NSF) and participating countries under the management of the Consortium for Ocean Leadership, including the Australian and New Zealand International Ocean Discovery Program Consortium. Funding was provided by Royal Society Te Apārangi Marsden Fund (18-VUW-089 to R.M.M. and 15-VUW-131 to N.A.N.B.) and the New Zealand Ministry of Business, Innovation and Employment through the Antarctic Science Platform (ANTA1801). ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Southern Ocean The Antarctic East Antarctica New Zealand Marsden ENVELOPE(66.067,66.067,-67.867,-67.867) Nature Geoscience 14 10 762 768 |