Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea
International audience [1] The last glacial was punctuated by several massive ice sheet surges into the North Atlantic that impacted surface water hydrology especially where icebergs melted. However, the links between variations in surface water hydrology and surface water productivity during these...
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-02959669 https://hal.science/hal-02959669/document https://hal.science/hal-02959669/file/2006PA001335.pdf https://doi.org/10.1029/2006PA001335 |
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ftuniversailles:oai:HAL:hal-02959669v1 2024-04-28T08:25:02+00:00 Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea Nave, S. Labeyrie, L. Gherardi, J. Caillon, N. Cortijo, E. Kissel, C. Abrantes, F. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Climat et Magnétisme (CLIMAG) Instituto Nacional de Engenharia, Tecnologia e Inovacao (INETI) 2007-09 https://hal.science/hal-02959669 https://hal.science/hal-02959669/document https://hal.science/hal-02959669/file/2006PA001335.pdf https://doi.org/10.1029/2006PA001335 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2006PA001335 hal-02959669 https://hal.science/hal-02959669 https://hal.science/hal-02959669/document https://hal.science/hal-02959669/file/2006PA001335.pdf doi:10.1029/2006PA001335 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02959669 Paleoceanography, 2007, 22 (3), pp.n/a-n/a. ⟨10.1029/2006PA001335⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2007 ftuniversailles https://doi.org/10.1029/2006PA001335 2024-04-04T17:36:17Z International audience [1] The last glacial was punctuated by several massive ice sheet surges into the North Atlantic that impacted surface water hydrology especially where icebergs melted. However, the links between variations in surface water hydrology and surface water productivity during these Heinrich events (HEs) remain uncertain. To address this issue, diatoms and organic carbon were examined across Heinrich event 1 (HE 1) and Heinrich event 4 (HE 4) in seven sediment cores spanning 40°N to 63°N latitude. Our results show low diatom abundances during HEs, consistent with decreased surface water productivity. Diatom dilution by increased sediment flux was tested by normalizing diatom abundance to a constant 230 Th flux. Although the particle rain rate was enhanced during HEs, this does not explain the sharp drop in diatoms. During HE 4, surface productivity decreased at all latitudes examined, probably because of strong, year-round stratification. The same inferred changes occurred during HE 1 within the area of maximum iceberg melting. However, at northern latitudes (above 50°N) the summer insolation increase of the glacial termination drove increased surface productivity during the whole period, including HE 1. Marine organic carbon, taken as independent proxy for export production, supports the diatom data. Trends shown by the productivity proxies evolve generally in parallel with the hydrographic proxies, with an increase in productivity when sea surface temperature increases. Article in Journal/Newspaper Ice Sheet North Atlantic Norwegian Sea Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Paleoceanography 22 3 n/a n/a |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Nave, S. Labeyrie, L. Gherardi, J. Caillon, N. Cortijo, E. Kissel, C. Abrantes, F. Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience [1] The last glacial was punctuated by several massive ice sheet surges into the North Atlantic that impacted surface water hydrology especially where icebergs melted. However, the links between variations in surface water hydrology and surface water productivity during these Heinrich events (HEs) remain uncertain. To address this issue, diatoms and organic carbon were examined across Heinrich event 1 (HE 1) and Heinrich event 4 (HE 4) in seven sediment cores spanning 40°N to 63°N latitude. Our results show low diatom abundances during HEs, consistent with decreased surface water productivity. Diatom dilution by increased sediment flux was tested by normalizing diatom abundance to a constant 230 Th flux. Although the particle rain rate was enhanced during HEs, this does not explain the sharp drop in diatoms. During HE 4, surface productivity decreased at all latitudes examined, probably because of strong, year-round stratification. The same inferred changes occurred during HE 1 within the area of maximum iceberg melting. However, at northern latitudes (above 50°N) the summer insolation increase of the glacial termination drove increased surface productivity during the whole period, including HE 1. Marine organic carbon, taken as independent proxy for export production, supports the diatom data. Trends shown by the productivity proxies evolve generally in parallel with the hydrographic proxies, with an increase in productivity when sea surface temperature increases. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Paléocéanographie (PALEOCEAN) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Climat et Magnétisme (CLIMAG) Instituto Nacional de Engenharia, Tecnologia e Inovacao (INETI) |
format |
Article in Journal/Newspaper |
author |
Nave, S. Labeyrie, L. Gherardi, J. Caillon, N. Cortijo, E. Kissel, C. Abrantes, F. |
author_facet |
Nave, S. Labeyrie, L. Gherardi, J. Caillon, N. Cortijo, E. Kissel, C. Abrantes, F. |
author_sort |
Nave, S. |
title |
Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
title_short |
Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
title_full |
Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
title_fullStr |
Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
title_full_unstemmed |
Primary productivity response to Heinrich events in the North Atlantic Ocean and Norwegian Sea |
title_sort |
primary productivity response to heinrich events in the north atlantic ocean and norwegian sea |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-02959669 https://hal.science/hal-02959669/document https://hal.science/hal-02959669/file/2006PA001335.pdf https://doi.org/10.1029/2006PA001335 |
genre |
Ice Sheet North Atlantic Norwegian Sea |
genre_facet |
Ice Sheet North Atlantic Norwegian Sea |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02959669 Paleoceanography, 2007, 22 (3), pp.n/a-n/a. ⟨10.1029/2006PA001335⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2006PA001335 hal-02959669 https://hal.science/hal-02959669 https://hal.science/hal-02959669/document https://hal.science/hal-02959669/file/2006PA001335.pdf doi:10.1029/2006PA001335 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2006PA001335 |
container_title |
Paleoceanography |
container_volume |
22 |
container_issue |
3 |
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1797584993799634944 |