Phosphorus cycling in the upper waters of the Mediterranean Sea (PEACETIME cruise): relative contribution of external and internal sources

Pulido-Villena, Elvira; Desboeufs, Karine; Djaoudi, Kahina; Van Wambeke, France; Barrillon, Stéphanie; Doglioli, Andrea; Petrenko, Anne; Taillandier, Vincent; Fu, Franck; Gaillard, Tiphanie; Guasco, Sophie; Nunige, Sandra; Triquet, Sylvain; Guieu, Cécile

doi:https://doi.org/10.5194/bg-18-5871-2021

Articles | Volume 18, issue 21

Biogeosciences, 18, 5871–5889, 2021

https://doi.org/10.5194/bg-18-5871-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Atmospheric deposition in the low-nutrient-low-chlorophyll...

Biogeosciences, 18, 5871–5889, 2021

https://doi.org/10.5194/bg-18-5871-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 21

Research article 04 Nov 2021

Research article | 04 Nov 2021

Phosphorus cycling in the upper waters of the Mediterranean Sea (PEACETIME cruise): relative contribution of external and internal sources

Elvira Pulido-Villena et al.

Supplement

https://doi.org/10.5194/bg-18-5871-2021-supplement

Data sets

BIOGEOCHEMICAL dataset collected during the PEACETIME cruise Cecile Guieu, Karine Desboeufs, Samuel Albani , Samir Alliouane, Olivier Aumont, Marie Barbieux, Stéphanie Barrillon, Anne-Claire Baudoux, Léo Berline, Nagib Bhairy, Estelle Bigeard, Matthew Bloss, Matthieu Bressac, J. Brito, François Carlotti, Guillaume de Liege, Julie Dinasquet, Kahina Djaoudi, Andréa Doglioli, Fabrizio D'Ortenzio, Jean-François Doussin, Lucile Duforet, François Dulac, Jean-Claude Dutay, Anja Engel, Guillermo Feliu-Brito, Hélène Ferre, Paola Formenti, Franck Fu, David Garcia, Marc Garel, Frédéric Gazeau, Chiara Giorio, Gérald Gregori, Jean-Michel Grisoni, Sophie Guasco, Joris Guittonneau, Nils Haëntjens, Lars-Eric Heimburger, Sandra Helias, Stéphanie Jacquet, Brice Laurent, Nathalie Leblond, Dominique Lefevre, Marc Mallet, Emilio Marañón, Pierre Nabat, A. Nicosia, Ingrid Obernosterer, Maria Perez Lorenzo, Anne Petrenko, Elvira Pulido-Villena, Patrick Raimbault, Céline Ridame, Véronique Riffault, Gilles Rougier, Louise Rousselet, Matthieu Roy-Barman, Alfonso Saiz-Lopez, Catherine Schmechtig, Karine Sellegri, Guillaume Siour, Vincent Taillandier, Christian Tamburini, Melilotus Thyssen, Antonio Tovar-Sanchez, Sylvain Triquet, Julia Uitz, France Van Wambeke, Thibaut Wagener, and Birthe Zaencker https://www.seanoe.org/data/00645/75747/

Short summary

We report on phosphorus dynamics in the surface layer of the Mediterranean Sea. Highly sensitive phosphate measurements revealed vertical gradients above the phosphacline. The relative contribution of diapycnal fluxes to total external supply of phosphate to the mixed layer decreased towards the east, where atmospheric deposition dominated. Taken together, external sources of phosphate contributed little to total supply, which was mainly sustained by enzymatic hydrolysis of organic phosphorus.