Articles | Volume 19, issue 16
https://doi.org/10.5194/bg-19-3911-2022
© Author(s) 2022. 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-19-3911-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
30 Aug 2022
Research article |
| 30 Aug 2022
| 30 Aug 2022
Physical mechanisms for biological carbon uptake during the onset of the spring phytoplankton bloom in the northwestern Mediterranean Sea (BOUSSOLE site)
Liliane Merlivat
CORRESPONDING AUTHOR
LOCEAN-IPSL, Sorbonne Université-CNRS-IRD-MNHN, 75005 Paris,
France
Michael Hemming
Coastal and Regional Oceanography Lab, Centre for Marine Science
and Innovation, UNSW Sydney, Sydney, NSW 2052, Australia
Jacqueline Boutin
LOCEAN-IPSL, Sorbonne Université-CNRS-IRD-MNHN, 75005 Paris,
France
David Antoine
Remote Sensing and Satellite Research Group, School of Earth and
Planetary Sciences, Curtin University, Perth, WA 6845, Australia
Laboratoire d'Océanographie de Villefranche, Sorbonne Université, CNRS, Villefranche-sur-Mer 06230, France
Vincenzo Vellucci
Institut de la Mer de Villefranche, Sorbonne Université, CNRS, Villefranche-sur-Mer 06230, France
Melek Golbol
Institut de la Mer de Villefranche, Sorbonne Université, CNRS, Villefranche-sur-Mer 06230, France
Gareth A. Lee
Centre for Ocean and Atmospheric Sciences, School of Environmental
Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ,
UK
Laurence Beaumont
Division Technique, INSU-CNRS, 92195 Meudon CEDEX, France
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Paula Maria Salgado-Hernanz, Aurore Regaudie-de-Gioux, David Antoine, and Gotzon Basterretxea
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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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Multispectral optical sensors and models are increasingly adopted to study marine systems. In this work, bio-optical mooring and biogeochemical Argo float optical observations are combined with the Ocean-Atmosphere Spectral Irradiance Model (OASIM) to analyse the variability of sunlight at the sea surface. We show that the model skill in simulating data varies according to the wavelength of light and temporal scale considered and that it is significantly affected by cloud dynamics.
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The MALINA oceanographic expedition was conducted in the Mackenzie River and the Beaufort Sea systems. The sampling was performed across seven shelf–basin transects to capture the meridional gradient between the estuary and the open ocean. The main goal of this research program was to better understand how processes such as primary production are influencing the fate of organic matter originating from the surrounding terrestrial landscape during its transition toward the Arctic Ocean.
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Data from the ARKTIKA-2018 expedition and new satellite data help us to follow rapid changes in the upper layer of the Laptev and East Siberian seas (LS, ESS) in summer 2018. With satellite-derived surface temperature, an improved SMOS salinity, and wind, we study how the fresh river water is mixed with cold sea water and ice-melted water at small time and spatial scales. The wind pushes fresh water northward and northeastward, close to and under the ice, forcing it into the deep Arctic Ocean.
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Short summary
We use in situ high-temporal-resolution measurements of dissolved inorganic carbon and atmospheric parameters at the air–sea interface to analyse phytoplankton bloom initiation identified as the net rate of biological carbon uptake in the Mediterranean Sea. The shift from wind-driven to buoyancy-driven mixing creates conditions for blooms to begin. Active mixing at the air–sea interface leads to the onset of the surface phytoplankton bloom due to the relaxation of wind speed following storms.
We use in situ high-temporal-resolution measurements of dissolved inorganic carbon and...
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