Articles | Volume 19, issue 4
https://doi.org/10.5194/bg-19-1165-2022
https://doi.org/10.5194/bg-19-1165-2022
Research article
 | 
24 Feb 2022
Research article |  | 24 Feb 2022

Biological production in two contrasted regions of the Mediterranean Sea during the oligotrophic period: an estimate based on the diel cycle of optical properties measured by BioGeoChemical-Argo profiling floats

Marie Barbieux, Julia Uitz, Alexandre Mignot, Collin Roesler, Hervé Claustre, Bernard Gentili, Vincent Taillandier, Fabrizio D'Ortenzio, Hubert Loisel, Antoine Poteau, Edouard Leymarie, Christophe Penkerc'h, Catherine Schmechtig, and Annick Bricaud

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Cited articles

Ahn, Y.-H., Bricaud, A., and Morel, A.: Light backscattering efficiency and related properties of some phytoplankters, Deep-Sea Res. Pt. A, 39, 1835–1855, https://doi.org/10.1016/0198-0149(92)90002-B, 1992. 
Allen, J. I., Somerfield, P. J., and Siddorn, J.: Primary and bacterial production in the Mediterranean Sea: a modelling study, J. Mar. Syst., 33/34, 473–495, https://doi.org/10.1016/S0924-7963(02)00072-6, 2002. 
Álvarez, E., Morán, X. A. G., López-Urrutia, Á., and Nogueira, E.: Size-dependent photoacclimation of the phytoplankton community in temperate shelf waters (southern Bay of Biscay), Mar. Ecol. Prog. Ser., 543, 73–87, https://doi.org/10.3354/meps11580, 2016. 
Antoine, D., Morel, A., and André, J.-M.: Algal pigment distribution and primary production in the eastern Mediterranean as derived from coastal zone color scanner observations, J. Geophys. Res, 100, 16193–16209, https://doi.org/10.1029/95JC00466, 1995. 
Antoine, D., André, J.-M., and Morel, A.: Oceanic primary production: 2. Estimation at global scale from satellite (Coastal Zone Color Scanner) chlorophyll, Global Biogeochem. Cy., 10, 57–69, https://doi.org/10.1029/95GB02832, 1996. 
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Short summary
This study assesses marine biological production in two Mediterranean systems representative of vast desert-like (oligotrophic) areas encountered in the global ocean. We use a novel approach based on non-intrusive high-frequency in situ measurements by two profiling robots, the BioGeoChemical-Argo (BGC-Argo) floats. Our results indicate substantial yet variable production rates and contribution to the whole water column of the subsurface layer, typically considered steady and non-productive.
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