Calcite accumulation in the eastern equatorial Pacific ...
The eastern equatorial Pacific (EEP) is an important center of biological productivity, generating significant organic carbon and calcite fluxes to the deep ocean. We reconstructed paleocalcite flux for the past 30,000 years in four cores collected beneath the equatorial upwelling and the South Equa...
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ftdatacite:10.1594/pangaea.839228 2024-09-15T18:37:14+00:00 Calcite accumulation in the eastern equatorial Pacific ... Loubere, Paul Mekik, Figen Francois, Roger Pichat, Sylvain 2004 application/zip https://dx.doi.org/10.1594/pangaea.839228 https://doi.pangaea.de/10.1594/PANGAEA.839228 en eng PANGAEA https://dx.doi.org/10.1029/2003pa000986 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Ocean Drilling Program ODP article Collection Supplementary Publication Series of Datasets 2004 ftdatacite https://doi.org/10.1594/pangaea.83922810.1029/2003pa000986 2024-08-01T10:57:41Z The eastern equatorial Pacific (EEP) is an important center of biological productivity, generating significant organic carbon and calcite fluxes to the deep ocean. We reconstructed paleocalcite flux for the past 30,000 years in four cores collected beneath the equatorial upwelling and the South Equatorial Current (SEC) by measuring ex230Th-normalized calcite accumulation rates corrected for dissolution with a newly developed proxy for "fraction of calcite preserved". This method produced very similar results at the four sites and revealed that the export flux of calcite was 30-50% lower during the LGM compared to the Holocene. The internal consistency of these results supports our interpretation, which is also in agreement with emerging data indicating lower glacial productivity in the EEP, possibly as a result of lower nutrient supply from the southern ocean via the Equatorial Undercurrent. However, these findings contradict previous interpretations based on mass accumulation rates (MAR) of biogenic ... : Supplement to: Loubere, Paul; Mekik, Figen; Francois, Roger; Pichat, Sylvain (2004): Export fluxes of calcite in the eastern equatorial Pacific from the Last Glacial Maximum to present. Paleoceanography, 19(2), PA2018 ... Article in Journal/Newspaper Southern Ocean DataCite |
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English |
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Ocean Drilling Program ODP |
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Ocean Drilling Program ODP Loubere, Paul Mekik, Figen Francois, Roger Pichat, Sylvain Calcite accumulation in the eastern equatorial Pacific ... |
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Ocean Drilling Program ODP |
description |
The eastern equatorial Pacific (EEP) is an important center of biological productivity, generating significant organic carbon and calcite fluxes to the deep ocean. We reconstructed paleocalcite flux for the past 30,000 years in four cores collected beneath the equatorial upwelling and the South Equatorial Current (SEC) by measuring ex230Th-normalized calcite accumulation rates corrected for dissolution with a newly developed proxy for "fraction of calcite preserved". This method produced very similar results at the four sites and revealed that the export flux of calcite was 30-50% lower during the LGM compared to the Holocene. The internal consistency of these results supports our interpretation, which is also in agreement with emerging data indicating lower glacial productivity in the EEP, possibly as a result of lower nutrient supply from the southern ocean via the Equatorial Undercurrent. However, these findings contradict previous interpretations based on mass accumulation rates (MAR) of biogenic ... : Supplement to: Loubere, Paul; Mekik, Figen; Francois, Roger; Pichat, Sylvain (2004): Export fluxes of calcite in the eastern equatorial Pacific from the Last Glacial Maximum to present. Paleoceanography, 19(2), PA2018 ... |
format |
Article in Journal/Newspaper |
author |
Loubere, Paul Mekik, Figen Francois, Roger Pichat, Sylvain |
author_facet |
Loubere, Paul Mekik, Figen Francois, Roger Pichat, Sylvain |
author_sort |
Loubere, Paul |
title |
Calcite accumulation in the eastern equatorial Pacific ... |
title_short |
Calcite accumulation in the eastern equatorial Pacific ... |
title_full |
Calcite accumulation in the eastern equatorial Pacific ... |
title_fullStr |
Calcite accumulation in the eastern equatorial Pacific ... |
title_full_unstemmed |
Calcite accumulation in the eastern equatorial Pacific ... |
title_sort |
calcite accumulation in the eastern equatorial pacific ... |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://dx.doi.org/10.1594/pangaea.839228 https://doi.pangaea.de/10.1594/PANGAEA.839228 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://dx.doi.org/10.1029/2003pa000986 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.83922810.1029/2003pa000986 |
_version_ |
1810481585211834368 |