Articles | Volume 18, issue 2
https://doi.org/10.5194/bg-18-755-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-755-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
01 Feb 2021
Research article |
| 01 Feb 2021
| 01 Feb 2021
Dynamics of the deep chlorophyll maximum in the Black Sea as depicted by BGC-Argo floats
Florian Ricour
Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
Laboratoire d'Océanographie de Villefranche, Sorbonne Universités, Villefranche-sur-Mer, France
Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
Fabrizio D'Ortenzio
Laboratoire d'Océanographie de Villefranche, Sorbonne Universités, Villefranche-sur-Mer, France
Bruno Delille
Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
Marilaure Grégoire
Freshwater and OCeanic science Unit of reSearch (FOCUS), University of Liège, Liège, Belgium
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Revised manuscript not accepted
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Paolo Lazzari, Stefano Salon, Elena Terzić, Watson W. Gregg, Fabrizio D'Ortenzio, Vincenzo Vellucci, Emanuele Organelli, and David Antoine
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Preprint withdrawn
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Arthur Capet, Luc Vandenbulcke, and Marilaure Grégoire
Biogeosciences, 17, 6507–6525, https://doi.org/10.5194/bg-17-6507-2020, https://doi.org/10.5194/bg-17-6507-2020, 2020
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The Black Sea is 2000 m deep, but, due to limited ventilation, only about the upper 100 m contains enough oxygen to support marine life such as fish. This oxygenation depth has been shown to be decreasing (1955–2019). Here, we evidence that atmospheric warming induced a clear shift in an important ventilation mechanism. We highlight the impact of this shift on oxygenation. There are important implications for marine life and carbon and nutrient cycling if this new ventilation regime persists.
Cécile Guieu, Fabrizio D'Ortenzio, François Dulac, Vincent Taillandier, Andrea Doglioli, Anne Petrenko, Stéphanie Barrillon, Marc Mallet, Pierre Nabat, and Karine Desboeufs
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We describe here the objectives and strategy of the PEACETIME project and cruise, dedicated to dust deposition and its impacts in the Mediterranean Sea. Our strategy to go a step further forward than in previous approaches in understanding these impacts by catching a real deposition event at sea is detailed. We summarize the work performed at sea, the type of data acquired and their valorization in the papers published in the special issue.
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Short summary
This paper addresses the phenology of the deep chlorophyll maximum (DCM) in the Black Sea (BS). We show that the DCM forms in March at a density level set by the winter mixed layer. It maintains this location until June, suggesting an influence of the DCM on light and nutrient profiles rather than mere adaptation to external factors. In summer, the DCM concentrates ~55 % of the chlorophyll in a 10 m layer at ~35 m depth and should be considered a major feature of the BS phytoplankton dynamics.
This paper addresses the phenology of the deep chlorophyll maximum (DCM) in the Black Sea (BS)....
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