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| Kheireddine, Malika; Dall'Olmo, Giorgio; Ouhssain, Mustapha; Krokos, George; Claustre, Hervé; Schmechtig, Catherine; Poteau, Antoine; Zhan, Peng; Hoteit, Ibrahim; Jones, Burton H.. |
| 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... |
| Tipo: Text |
Palavras-chave: Carbon export; Carbon loss rates; Mesopelagic zone; Temperature; Oxygen; Tropical ecosystem. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00655/76730/77877.pdf |
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| Ras, Joséphine; Ouhssain, Mustapha. |
| The "BOUée pour l'acquiSition d'une Série Optique à Long termE" project (BOUSSOLE), can be translated from French as the “buoy for the acquisition of a long-‐term optical series." It involves monthly servicing cruises to an offshore site between Nice and Corsica where a buoy dedicated to radiometric measurements acquires data continuously. During these visits, the activities are dedicated to the buoy servicing and to the acquisition of complementary data such as vertical profiles of radiometric quantities, phytoplankton pigments (HPLC), particulate absorption (filter pad technique), total suspended matter etc…(Antoine et al., 2006). These latter three parameters are obtained thanks to in situ sampling of seawater at 11 depths throughout the euphotic layer... |
| Tipo: Text |
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| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00655/76702/77861.pdf |
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