| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Particulate biogenic barium tracer of mesopelagic carbon remineralization in the Mediterranean Sea (PEACETIME project)
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| Autores: |
Jacquet, Stéphanie Hm
Tamburini, Christian
Garel, Marc
Dufour, Aurélie
Van Vambeke, France
Le Moigne, Frédéric Ac
Bhairy, Nagib
Guasco, Sophie
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| Data: |
2020
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| Ano: |
2020
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| Resumo: |
We report on the sub-basins variability of particulate organic carbon (POC) remineralization in the central and western Mediterranean Sea during a late spring period (PEACETIME cruise). POC remineralization rates (MR) were estimated using the excess non-lithogenic particulate barium (Baxs) inventories in mesopelagic waters (100–1000 m) and compared with prokaryotic heterotrophic production (PHP). MR range from 25 ± 2 to 306 ± 70 mg C m−2 d−1. Results reveal larger MR processes in the Algerian (ALG) basin compared to the Tyrrhenian (TYR) and Ionian (ION) basins. Baxs inventories and PHP also indicates that significant remineralization occurs over the whole mesopelagic layers in the ALG basin in contrast to the ION and TYR basins where remineralization is mainly located in the upper 500 m horizon. We propose that this may be due to particle injection pumps likely driven by strong winter convection in the Western basin of the Mediterranean Sea. This implies significant differences in the remineralization length scale of POC in the central Mediterranean Sea relative to the western region.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00652/76399/77438.pdf
DOI:10.5194/bg-2020-271
https://archimer.ifremer.fr/doc/00652/76399/
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| Editor: |
Copernicus GmbH
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| Formato: |
application/pdf
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| Fonte: |
Biogeosciences (1726-4189) (Copernicus GmbH) In Press
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| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
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