Data/hora: 08/06/2024 14:29:10

Provedor de dados: | 5
País: | France
Título: | On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization
Autores: | Jacquet, Stéphanie Hm; Lefèvre, Dominique; Tamburini, Christian; Garel, Marc; Le Moigne, Frédéric Ac; Bhairy, Nagib; Guasco, Sophie.
Data: | 2021
Ano: | 2021
Resumo: | n the ocean, remineralization rate associated with sinking particles is a crucial variable. Since the 1990s, particulate biogenic barium (Baxs) has been used as an indicator of carbon remineralization by applying a transfer function relating Baxs to O2 consumption (Dehairs's transfer function, Southern Ocean-based). Here, we tested its validity in the Mediterranean Sea (ANTARES/EMSO-LO) for the first time by investigating connections between Baxs, prokaryotic heterotrophic production (PHP) and oxygen consumption (JO2-Opt; optodes measurement). We show that (1) higher Baxs (409 pM; 100–500 m) occurs in situations where integrated PHP (PHP100/500=0.90) is located deeper, (2) higher Baxs occurs with increasing JO2-Opt, and (3) there is similar magnitude between JO2-Opt (3.14 mmol m−2 d−1; 175–450 m) and JO2-Ba (4.59 mmol m−2 d−1; transfer function). Overall, Baxs, PHP and JO2 relationships follow trends observed earlier in the Southern Ocean. We conclude that such a transfer function could apply in the Mediterranean Sea.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00648/76038/76959.pdf

https://archimer.ifremer.fr/doc/00648/76038/83021.pdf

DOI:10.5194/bg-18-2205-2021

https://archimer.ifremer.fr/doc/00648/76038/

Editor: | Copernicus GmbH
Formato: | application/pdf
Fonte: | Biogeosciences (1726-4189) (Copernicus GmbH), 2021 , Vol. 18 , N. 6 , P. 2205-2212

Fonte:

info:eu-repo/semantics/openAccess

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