Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218
This study analyzes coccolithophore abundance fluctuations (e.g., Emiliania huxleyi, Gephyrocapsa specimens, and Florisphaera profunda) in core MD01-2444 sediment strata retrieved at the Iberian Margin, northeastern Atlantic Ocean. Coccolithophores are calcareous nannofossils, a major component of t...
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Online Access: | https://dx.doi.org/10.1594/pangaea.831559 https://doi.pangaea.de/10.1594/PANGAEA.831559 |
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ftdatacite:10.1594/pangaea.831559 2023-05-15T15:19:15+02:00 Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 Incarbona, Alessandro Martrat, Belén Di Stefano, Enrico Grimalt, Joan O Pelosi, Nicola Patti, Bernardo Tranchida, Giorgio 2010 application/zip https://dx.doi.org/10.1594/pangaea.831559 https://doi.pangaea.de/10.1594/PANGAEA.831559 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/2008pa001709 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Calypso Corer MD123 Marion Dufresne 1995 article Supplementary Collection of Datasets Collection 2010 ftdatacite https://doi.org/10.1594/pangaea.831559 https://doi.org/10.1029/2008pa001709 2022-02-09T13:17:41Z This study analyzes coccolithophore abundance fluctuations (e.g., Emiliania huxleyi, Gephyrocapsa specimens, and Florisphaera profunda) in core MD01-2444 sediment strata retrieved at the Iberian Margin, northeastern Atlantic Ocean. Coccolithophores are calcareous nannofossils, a major component of the oceanic phytoplankton, which provide information about past ecological and climatological variability. Results are supported by data on fossil organic compounds (sea surface temperatures, alkenones, and n-hexacosan-1-ol index) and geochemical analyses (benthic d13Ccc and planktonic d18Occ isotopes). Three scenarios are taken into account for this location at centennial-scale resolution over the last 70,000 years: the Holocene and the stadial and interstadial modes. The different alternatives are described by means of elements such as nutrients; upwelling phenomena; temperatures at surface and subsurface level; or the arrival of surface turbid, fresh, and cold waters due to icebergs, low sea level, increased aridity, and dust. During the Holocene, moderate primary productivity was observed (mainly concentrated in E. huxleyi specimens); surface temperatures were at maxima while the water column was highly ventilated by northern-sourced polar deep waters and warmer subsurface, nutrient-poor subtropical waters. Over most of the last glacial stadials, surface productivity weakened (higher F. profunda and reworked specimen percentages and lower diunsaturated and triunsaturated C37 alkenones); the arrival of cold Arctic surface waters traced by tetraunsaturated C37 peaks and large E. huxleyi, together with powerful ventilated southern-sourced polar deep waters, disturbed, in all likelihood, the delicate vertical equilibrium while preventing significant upwelling mixing. Finally, during the last glacial interstadials (lower F. profunda percentages, nonreworked material, and higher diunsaturated and triunsaturated C37 alkenones) a combined signal is observed: warm surface temperatures were concurrent with generally low oxygenation of the deep-sea floor, moderate arrival of northern-sourced deep waters, and subsurface cold, nutrient-rich, recently upwelled waters, probably of polar origin; these particular conditions may have promoted vertical mixing while enhancing surface primary productivity (mainly of Gephyrocapsa specimens). Article in Journal/Newspaper Arctic Iceberg* Phytoplankton DataCite Metadata Store (German National Library of Science and Technology) Arctic |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Calypso Corer MD123 Marion Dufresne 1995 |
spellingShingle |
Calypso Corer MD123 Marion Dufresne 1995 Incarbona, Alessandro Martrat, Belén Di Stefano, Enrico Grimalt, Joan O Pelosi, Nicola Patti, Bernardo Tranchida, Giorgio Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
topic_facet |
Calypso Corer MD123 Marion Dufresne 1995 |
description |
This study analyzes coccolithophore abundance fluctuations (e.g., Emiliania huxleyi, Gephyrocapsa specimens, and Florisphaera profunda) in core MD01-2444 sediment strata retrieved at the Iberian Margin, northeastern Atlantic Ocean. Coccolithophores are calcareous nannofossils, a major component of the oceanic phytoplankton, which provide information about past ecological and climatological variability. Results are supported by data on fossil organic compounds (sea surface temperatures, alkenones, and n-hexacosan-1-ol index) and geochemical analyses (benthic d13Ccc and planktonic d18Occ isotopes). Three scenarios are taken into account for this location at centennial-scale resolution over the last 70,000 years: the Holocene and the stadial and interstadial modes. The different alternatives are described by means of elements such as nutrients; upwelling phenomena; temperatures at surface and subsurface level; or the arrival of surface turbid, fresh, and cold waters due to icebergs, low sea level, increased aridity, and dust. During the Holocene, moderate primary productivity was observed (mainly concentrated in E. huxleyi specimens); surface temperatures were at maxima while the water column was highly ventilated by northern-sourced polar deep waters and warmer subsurface, nutrient-poor subtropical waters. Over most of the last glacial stadials, surface productivity weakened (higher F. profunda and reworked specimen percentages and lower diunsaturated and triunsaturated C37 alkenones); the arrival of cold Arctic surface waters traced by tetraunsaturated C37 peaks and large E. huxleyi, together with powerful ventilated southern-sourced polar deep waters, disturbed, in all likelihood, the delicate vertical equilibrium while preventing significant upwelling mixing. Finally, during the last glacial interstadials (lower F. profunda percentages, nonreworked material, and higher diunsaturated and triunsaturated C37 alkenones) a combined signal is observed: warm surface temperatures were concurrent with generally low oxygenation of the deep-sea floor, moderate arrival of northern-sourced deep waters, and subsurface cold, nutrient-rich, recently upwelled waters, probably of polar origin; these particular conditions may have promoted vertical mixing while enhancing surface primary productivity (mainly of Gephyrocapsa specimens). |
format |
Article in Journal/Newspaper |
author |
Incarbona, Alessandro Martrat, Belén Di Stefano, Enrico Grimalt, Joan O Pelosi, Nicola Patti, Bernardo Tranchida, Giorgio |
author_facet |
Incarbona, Alessandro Martrat, Belén Di Stefano, Enrico Grimalt, Joan O Pelosi, Nicola Patti, Bernardo Tranchida, Giorgio |
author_sort |
Incarbona, Alessandro |
title |
Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
title_short |
Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
title_full |
Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
title_fullStr |
Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
title_full_unstemmed |
Coccolithosphores and fossil organic compounds of sediment core MD01-2444, supplement to: Incarbona, Alessandro; Martrat, Belén; Di Stefano, Enrico; Grimalt, Joan O; Pelosi, Nicola; Patti, Bernardo; Tranchida, Giorgio (2010): Primary productivity variability on the Atlantic Iberian Margin over the last 70,000 years: Evidence from coccolithophores and fossil organic compounds. Paleoceanography, 25(2), PA2218 |
title_sort |
coccolithosphores and fossil organic compounds of sediment core md01-2444, supplement to: incarbona, alessandro; martrat, belén; di stefano, enrico; grimalt, joan o; pelosi, nicola; patti, bernardo; tranchida, giorgio (2010): primary productivity variability on the atlantic iberian margin over the last 70,000 years: evidence from coccolithophores and fossil organic compounds. paleoceanography, 25(2), pa2218 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2010 |
url |
https://dx.doi.org/10.1594/pangaea.831559 https://doi.pangaea.de/10.1594/PANGAEA.831559 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Iceberg* Phytoplankton |
genre_facet |
Arctic Iceberg* Phytoplankton |
op_relation |
https://dx.doi.org/10.1029/2008pa001709 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.831559 https://doi.org/10.1029/2008pa001709 |
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1766349435383578624 |