Data/hora: 01/06/2024 01:21:06

Provedor de dados: | 5
País: | France
Título: | Organic Carbon Export and Loss Rates in the Red Sea
Autores: | Kheireddine, Malika; Dall'Olmo, Giorgio; Ouhssain, Mustapha; Krokos, George; Claustre, Hervé; Schmechtig, Catherine; Poteau, Antoine; Zhan, Peng; Hoteit, Ibrahim; Jones, Burton H.
Data: | 2020-10
Ano: | 2020
Palavras-chave: | Carbon export; Carbon loss rates; Mesopelagic zone; Temperature; Oxygen; Tropical ecosystem.
Resumo: | The export and fate of organic carbon in the mesopelagic zone are still poorly understood and quantified due to lack of observations. We exploited data from a biogeochemical‐Argo float that was deployed in the Red Sea to study how a warm and hypoxic environment can affect the fate of the organic carbon in the ocean's interior. We observed that only 10% of the particulate organic carbon (POC) exported survived at depth due to remineralization processes in the upper mesopelagic zone. We also found that POC exported was rapidly degraded in a first stage and slowly in a second one, which may be dependent on the palatability of the organic matter. We observed that apparent oxygen utilization (AOU)‐based loss rates (a proxy of the remineralization of total organic matter) were significantly higher than the POC‐based loss rates, likely because changes in AOU are mainly attributed to changes in dissolved organic carbon. Finally, we showed that POC‐ and AOU‐based loss rates could be expressed as a function of temperature and oxygen concentration. These findings advance our understanding of the biological carbon pump and mesopelagic ecosystem.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00655/76730/77877.pdf

https://archimer.ifremer.fr/doc/00655/76730/77878.docx

DOI:10.1029/2020GB006650

https://archimer.ifremer.fr/doc/00655/76730/

Editor: | American Geophysical Union (AGU)

Relação:

info:eu-repo/grantAgreement/EC/H2020/834177/EU//REFINE

info:eu-repo/grantAgreement/EC/FP7/246777/EU//REMOCEAN

Formato: | application/pdf
Fonte: | Global Biogeochemical Cycles (0886-6236) (American Geophysical Union (AGU)), 2020-10 , Vol. 34 , N. 10 , P. e2020GB006650 (20p.)

Fonte:

info:eu-repo/semantics/openAccess

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