300 results on '"Guieu, Cécile"'
Search Results
2. Impact of Atmospheric Deposition on Marine Chemistry and Biogeochemistry
- Author
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Guieu, Cécile, Ridame, Céline, Dulac, François, editor, Sauvage, Stéphane, editor, and Hamonou, Eric, editor
- Published
- 2022
- Full Text
- View/download PDF
3. Pyrogenic iron: The missing link to high iron solubility in aerosols
- Author
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Ito, Akinori, Myriokefalitakis, Stelios, Kanakidou, Maria, Mahowald, Natalie M, Scanza, Rachel A, Hamilton, Douglas S, Baker, Alex R, Jickells, Timothy, Sarin, Manmohan, Bikkina, Srinivas, Gao, Yuan, Shelley, Rachel U, Buck, Clifton S, Landing, William M, Bowie, Andrew R, Perron, Morgane MG, Guieu, Cécile, Meskhidze, Nicholas, Johnson, Matthew S, Feng, Yan, Kok, Jasper F, Nenes, Athanasios, and Duce, Robert A
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Aerosols ,Atlantic Ocean ,Atmosphere ,Dust ,Ferrosoferric Oxide ,Indian Ocean ,Iron ,Models ,Chemical ,Osmolar Concentration ,Soil ,Solubility - Abstract
Atmospheric deposition is a source of potentially bioavailable iron (Fe) and thus can partially control biological productivity in large parts of the ocean. However, the explanation of observed high aerosol Fe solubility compared to that in soil particles is still controversial, as several hypotheses have been proposed to explain this observation. Here, a statistical analysis of aerosol Fe solubility estimated from four models and observations compiled from multiple field campaigns suggests that pyrogenic aerosols are the main sources of aerosols with high Fe solubility at low concentration. Additionally, we find that field data over the Southern Ocean display a much wider range in aerosol Fe solubility compared to the models, which indicate an underestimation of labile Fe concentrations by a factor of 15. These findings suggest that pyrogenic Fe-containing aerosols are important sources of atmospheric bioavailable Fe to the open ocean and crucial for predicting anthropogenic perturbations to marine productivity.
- Published
- 2019
4. Iron-binding by dissolved organic matter in the Western Tropical South Pacific Ocean (GEOTRACES TONGA cruise GPpr14)
- Author
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Mahieu, Léo, primary, Whitby, Hannah, additional, Dulaquais, Gabriel, additional, Tilliette, Chloé, additional, Guigue, Catherine, additional, Tedetti, Marc, additional, Lefevre, Dominique, additional, Fourrier, Pierre, additional, Bressac, Matthieu, additional, Sarthou, Géraldine, additional, Bonnet, Sophie, additional, Guieu, Cécile, additional, and Salaün, Pascal, additional
- Published
- 2024
- Full Text
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5. Significant Impact of Hydrothermalism on the Biogeochemical Signature of Sinking and Sedimented Particles in the Lau Basin
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Tilliette, Chloé, primary, Gazeau, Frédéric, additional, Chavagnac, Valérie, additional, Leblond, Nathalie, additional, Montanes, Maryline, additional, Leblanc, Karine, additional, Schmidt, Sabine, additional, Charrière, Bruno, additional, Bhairy, Nagib, additional, and Guieu, Cécile, additional
- Published
- 2023
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6. Plankton community structure in response to hydrothermal iron inputs along the Tonga-Kermadec arc
- Author
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Mériguet, Zoé, primary, Vilain, Marion, additional, Baudena, Alberto, additional, Tilliette, Chloé, additional, Habasque, Jérémie, additional, Lebourges-Dhaussy, Anne, additional, Bhairy, Nagib, additional, Guieu, Cécile, additional, Bonnet, Sophie, additional, and Lombard, Fabien, additional
- Published
- 2023
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7. Surface ocean microbiota determine cloud precursors
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Sellegri, Karine, Nicosia, Alessia, Freney, Evelyn, Uitz, Julia, Thyssen, Melilotus, Grégori, Gérald, Engel, Anja, Zäncker, Birthe, Haëntjens, Nils, Mas, Sébastien, Picard, David, Saint-Macary, Alexia, Peltola, Maija, Rose, Clémence, Trueblood, Jonathan, Lefevre, Dominique, D’Anna, Barbara, Desboeufs, Karine, Meskhidze, Nicholas, Guieu, Cécile, and Law, Cliff S.
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- 2021
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8. The role of humic-type ligands in the bioavailability and stabilization of dissolved iron in the Western Tropical South Pacific Ocean
- Author
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Dulaquais, Gabriel, primary, Fourrier, Pierre, additional, Guieu, Cécile, additional, Mahieu, Léo, additional, Riso, Ricardo, additional, Salaun, Pascal, additional, Tilliette, Chloé, additional, and Whitby, Hannah, additional
- Published
- 2023
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- View/download PDF
9. How French Bus Drivers, Managers and Unions Talk About Incivility and Physical and Verbal Assaults at Work
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Kornig, Cathel, Chanut-Guieu, Cécile, Domette, Lauriane, Louit-Martinod, Nathalie, Méhaut, Philippe, Cassilde, Stéphanie, editor, and Gilson, Adeline, editor
- Published
- 2017
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10. Modeling the impacts of atmospheric deposition of nitrogen and desert dust-derived phosphorus on nutrients and biological budgets of the Mediterranean Sea
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Richon, Camille, Dutay, Jean-Claude, Dulac, François, Wang, Rong, Balkanski, Yves, Nabat, Pierre, Aumont, Olivier, Desboeufs, Karine, Laurent, Benoı̂t, Guieu, Cécile, Raimbault, Patrick, and Beuvier, Jonathan
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- 2018
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11. Regionalisation of the Mediterranean basin, a MERMEX synthesis
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Ayata, Sakina-Dorothée, Irisson, Jean-Olivier, Aubert, Anaïs, Berline, Léo, Dutay, Jean-Claude, Mayot, Nicolas, Nieblas, Anne-Elise, D'Ortenzio, Fabrizio, Palmiéri, Julien, Reygondeau, Gabriel, Rossi, Vincent, and Guieu, Cécile
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- 2018
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12. Evolving research directions in Surface Ocean–Lower Atmosphere (SOLAS) science
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Law, Cliff S, Brévière, Emilie, de Leeuw, Gerrit, Garçon, Véronique, Guieu, Cécile, Kieber, David J, Kontradowitz, Stefan, Paulmier, Aurélien, Quinn, Patricia K, Saltzman, Eric S, Stefels, Jacqueline, and von Glasow, Roland
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Climate Action ,Life Below Water ,Chemical Sciences ,Earth Sciences ,Environmental Sciences - Abstract
This review focuses on critical issues in ocean-atmosphere exchange that will be addressed by new research strategies developed by the international Surface Ocean-Lower Atmosphere Study (SOLAS) research community. Eastern boundary upwelling systems are important sites for CO2 and trace gas emission to the atmosphere, and the proposed research will examine how heterotrophic processes in the underlying oxygen-deficient waters interact with the climate system. The second regional research focus will examine the role of sea-ice biogeochemistry and its interaction with atmospheric chemistry. Marine aerosols are the focus of a research theme directed at understanding the processes that determine their abundance, chemistry and radiative properties. A further area of aerosol-related research examines atmospheric nutrient deposition in the surface ocean, and how differences in origin, atmospheric processing and composition influence surface ocean biogeochemistry. Ship emissions are an increasing source of aerosols, nutrients and toxins to the atmosphere and ocean surface, and an emerging area of research will examine their effect on ocean biogeochemistry and atmospheric chemistry. The primary role of SOLAS is to coordinate coupled multi-disciplinary research within research strategies that address these issues, to achieve robust representation of critical ocean-atmosphere exchange processes in Earth System models. © 2013 CSIRO.
- Published
- 2013
13. Effect of Atmospheric Nutrients on the Autotrophic Communities in a Low Nutrient, Low Chlorophyll System
- Author
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Bonnet, Sophie, Guieu, Cécile, Chiaverini, Jacques, Ras, Joséphine, and Stock, Agnès
- Published
- 2005
14. Availability of Iron and Major Nutrients for Phytoplankton in the Northeast Atlantic Ocean
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Blain, Stéphane, Guieu, Cécile, Claustre, Hervé, Leblanc, Karine, Moutin, Thierry, Quéguiner, Bernard, Ras, Joséphine, and Sarthou, Géraldine
- Published
- 2004
15. Natural iron fertilization by shallow hydrothermal sources fuels diazotroph blooms in the ocean
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Bonnet, Sophie, primary, Guieu, Cécile, additional, Taillandier, Vincent, additional, Boulart, Cédric, additional, Bouruet-Aubertot, Pascale, additional, Gazeau, Frédéric, additional, Scalabrin, Carla, additional, Bressac, Matthieu, additional, Knapp, Angela N., additional, Cuypers, Yannis, additional, González-Santana, David, additional, Forrer, Heather J., additional, Grisoni, Jean-Michel, additional, Grosso, Olivier, additional, Habasque, Jérémie, additional, Jardin-Camps, Mercedes, additional, Leblond, Nathalie, additional, Le Moigne, Frédéric A. C., additional, Lebourges-Dhaussy, Anne, additional, Lory, Caroline, additional, Nunige, Sandra, additional, Pulido-Villena, Elvira, additional, Rizzo, Andrea L., additional, Sarthou, Géraldine, additional, and Tilliette, Chloé, additional
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- 2023
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16. Influence of shallow hydrothermal fluid release on the functioning of phytoplankton communities
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Tilliette, Chloé, primary, Gazeau, Frédéric, additional, Portlock, Gemma, additional, Benavides, Mar, additional, Bonnet, Sophie, additional, Guigue, Catherine, additional, Leblond, Nathalie, additional, Lory, Caroline, additional, Marie, Dominique, additional, Montanes, Maryline, additional, Pulido-Villena, Elvira, additional, Sarthou, Géraldine, additional, Tedetti, Marc, additional, Vorrath, Maria-Elena, additional, Whitby, Hannah, additional, and Guieu, Cécile, additional
- Published
- 2023
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17. Dust in the Ocean
- Author
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Guieu, Cécile, Shevchenko, Vladimir P., Harff, Jan, editor, Meschede, Martin, editor, Petersen, Sven, editor, and Thiede, JÖrn, editor
- Published
- 2016
- Full Text
- View/download PDF
18. Saharan Input of Phosphate to the Oligotrophic Water of the Open Western Mediterranean Sea
- Author
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Ridame, Céline and Guieu, Cécile
- Published
- 2002
19. Biogeochemical regions of the Mediterranean Sea: An objective multidimensional and multivariate environmental approach
- Author
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Reygondeau, Gabriel, Guieu, Cécile, Benedetti, Fabio, Irisson, Jean-Olivier, Ayata, Sakina-Dorothée, Gasparini, Stéphane, and Koubbi, Philippe
- Published
- 2017
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20. Temporal and spatial variability in the hydrothermal signature of sinking particles and sediments in the Western Tropical South Pacific Ocean
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Tilliette, Chloé, primary, Gazeau, Frédéric, additional, Chavagnac, Valerie, additional, Leblond, Nathalie, additional, Montanes, Maryline, additional, Leblanc, Karine, additional, Schmidt, Sabine, additional, Charrière, Bruno, additional, Bhairy, Nagib, additional, and Guieu, Cécile, additional
- Published
- 2023
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21. Ocean–Atmosphere Interactions of Particles
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de Leeuw, Gerrit, Guieu, Cécile, Arneth, Almuth, Bellouin, Nicolas, Bopp, Laurent, Boyd, Philip W., van der Gon, Hugo A. C. Denier, Desboeufs, Karine V., Dulac, François, Facchini, M. Cristina, Gantt, Brett, Langmann, Baerbel, Mahowald, Natalie M., Marañón, Emilio, O’Dowd, Colin, Olgun, Nazli, Pulido-Villena, Elvira, Rinaldi, Matteo, Stephanou, Euripides G., Wagener, Thibaut, Liss, Peter S., editor, and Johnson, Martin T., editor
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- 2014
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22. The MERMeX Program for the Mediterranean Sea
- Author
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Sempéré, Richard, de Madron, Xavier Durrieu, Guieu, Cécile, Ceccaldi, Hubert-Jean, editor, Dekeyser, Ivan, editor, Girault, Mathias, editor, and Stora, Georges, editor
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- 2011
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23. Iron from a submarine source impacts the productive layer of the Western Tropical South Pacific (WTSP)
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Guieu, Cécile, Bonnet, Sophie, Petrenko, Anne, Menkes, Christophe, Chavagnac, Valérie, Desboeufs, Karine, Maes, Christophe, and Moutin, Thierry
- Published
- 2018
- Full Text
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24. L’économie sociale et solidaire en coopérations
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Berdoulet, Stéphane, Blanc, Jérôme, Bornand, Elvire, Boudes, Mélissa, Chanut-Guieu, Cécile, Combes-Joret, Monique, Costanzo, Elsa, Cuénoud, Thibault, Defalvard, Hervé, Demoustier, Danièle, Desgris, Anne-Laure, Fare, Marie, Fraisse, Laurent, Gardin, Laurent, Gianfaldoni, Patrick, Glémain, Pascal, Gros, Laurent, Hiez, David, Jany-Catrice, Florence, Lambersens, Simon, Lerouvillois, Philippe, Leroy, Viviane, Lethielleux, Laëtitia, Lhuillier, Vincent, Linz, Blanca, Marival, Céline, Minuel, Renaud, Morin, Stéphanie, Nirello, Laura, Ouin, Virginie, Petrella, Francesca, Rasolonoromalaza, Kristina, Renault, Michel, Richez-Battesti, Nadine, Sangiorgio, Joseph, Semenowicz, Philippe, Tainturier, Pierre, Vaillancourt, Yves, Gardin, Laurent, and Jany-Catrice, Florence
- Subjects
économie sociale et solidaire ,Economics (General) ,BUS000000 ,Business - Abstract
Dans la situation actuelle des impasses du capitalisme contemporain, on attend de l’économie sociale et solidaire qu’elle incarne l’expérience concrète et située de modalités économiques alternatives à l’économie à but lucratif. La coopération, comme antinomie de la concurrence totale, est l’une des modalités de la coordination entre acteurs que l’économie sociale et solidaire met à l’épreuve dans le quotidien de ses pratiques. Cet ouvrage est un « livre ouvert de l’ESS en coopérations », c’est-à- dire qu’y est proposée une sorte de grammaire des coopérations, dans toutes les facettes que ces coopérations en marche peuvent suggérer ou susciter. Les acteurs conjuguent ces coopérations comme autant de « co-construction », de « co-production », de « partenariat », de « collaboration », voire de « dialogue social ». C’est cette présence multiforme, multiniveaux et multiacteurs qui est ici décrite, explorée et analysée. Si cette grammaire fait sens, alors la coopération exige un supplément de réflexivité sur les finalités des actions communes. C’est aussi dans les expérimentations et dans les résultats partiels auxquels elles donnent lieu, que les coopérations pourront enrichir les acteurs en compétences de coopération. Les auteurs de cet ouvrage offrent, par leurs disciplines diverses de rattachement, des regards croisés sur l’analyse des coopérations dans l’économie sociale et solidaire. On y trouvera des analyses des coopérations au sein de l’ESS, entre acteurs de l’ESS et acteurs du secteur à but lucratif, avec les pouvoirs publics, avec la recherche. Quelques travaux offrent un regard réflexif sur la manière par laquelle la formation oeuvre, ou pas, à la coopération dans et par l’ESS.
- Published
- 2022
25. Dissolved iron pattern impacted by shallow hydrothermal sources along a transect through the Tonga-Kermadec arc
- Author
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Tilliette, Chloé, Taillandier, Vincent, Bouruet-Aubertot, Pascale, Grima, Nicolas, Maes, Christophe, Montanes, Maryline, Sarthou, Géraldine, Vorrath, Maria-Elena, Arnone, Verónica, Bressac, Matthieu, González-Santana, David, Gazeau, Frédéric, Guieu, Cécile, Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Processus et interactions de fine échelle océanique (PROTEO), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Instituto de Oceanografía y Cambio Global (IOCAG), and Université de Las Palmas de Gran Canaria [Espagne] (ULPGC)
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Changement climatique ,[SDE]Environmental Sciences ,Climate change - Published
- 2022
26. Distribution of thiol and humic substances during the 2019 TONGA Cruise
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Portlock, Gemma, Fourrier, P., Dulaquais, Gabriel, Riso, R, Salaun, Pierre, Whitby, Hannah, Bonnet, Sophie, Guieu, Cécile, Gazeau, Frédéric, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SDE]Environmental Sciences - Abstract
International audience
- Published
- 2022
27. Impact of dust addition on the microbial food web under present and future conditions of pH and temperature
- Author
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Dinasquet, Julie, primary, Bigeard, Estelle, additional, Gazeau, Frédéric, additional, Azam, Farooq, additional, Guieu, Cécile, additional, Marañón, Emilio, additional, Ridame, Céline, additional, Van Wambeke, France, additional, Obernosterer, Ingrid, additional, and Baudoux, Anne-Claire, additional
- Published
- 2022
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- View/download PDF
28. DFe patterns impacted by shallow hydrothermal sources along a transect through the Tonga-Kermadec arc
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Tilliette, Chloé, primary, Taillandier, Vincent, additional, Bouruet-Aubertot, Pascale, additional, Grima, Nicolas, additional, Maes, Christophe, additional, Montanes, Maryline, additional, Sarthou, Geraldine, additional, Vorrath, Maria-Elena, additional, Arnone, Veronica, additional, Bressac, Matthieu, additional, González-Santana, David, additional, GAZEAU, Frédéric, additional, and Guieu, Cécile, additional
- Published
- 2022
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29. Wet deposition in the remote western and central Mediterranean as a source of trace metals to surface seawater
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Desboeufs, Karine, primary, Fu, Franck, additional, Bressac, Matthieu, additional, Tovar-Sánchez, Antonio, additional, Triquet, Sylvain, additional, Doussin, Jean-François, additional, Giorio, Chiara, additional, Chazette, Patrick, additional, Disnaquet, Julie, additional, Feron, Anaïs, additional, Formenti, Paola, additional, Maisonneuve, Franck, additional, Rodríguez-Romero, Araceli, additional, Zapf, Pascal, additional, Dulac, François, additional, and Guieu, Cécile, additional
- Published
- 2022
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30. N<sub>2</sub> fixation in the Mediterranean Sea related to the composition of the diazotrophic community and impact of dust under present and future environmental conditions
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Ridame, Céline, primary, Dinasquet, Julie, additional, Hallstrøm, Søren, additional, Bigeard, Estelle, additional, Riemann, Lasse, additional, Van Wambeke, France, additional, Bressac, Matthieu, additional, Pulido-Villena, Elvira, additional, Taillandier, Vincent, additional, Gazeau, Fréderic, additional, Tovar-Sanchez, Antonio, additional, Baudoux, Anne-Claire, additional, and Guieu, Cécile, additional
- Published
- 2022
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31. [ Sans Titre - No Title ]Start-up tribu : comment entreprendre avec sa communauté, Franck BARES, Bernard COVA, Anicet NEMANI, Éditions EMS, Novembre 2021
- Author
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Chanut-Guieu, Cécile, primary
- Published
- 2022
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32. Anomalously high abundance of Crocosphaera in the South Pacific Gyre
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Benavides, Mar, primary, Caffin, Mathieu, additional, Duhamel, Solange, additional, Foster, Rachel Ann, additional, Grosso, Olivier, additional, Guieu, Cécile, additional, Van Wambeke, France, additional, and Bonnet, Sophie, additional
- Published
- 2022
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33. Stratégies de croissance ou de coopération ? Les enjeux pour l’accueil du jeune enfant
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Petrella, Francesca, primary, Chanut-Guieu, Cécile, additional, Richez-Battesti, Nadine, additional, and Lhuillier, Vincent, additional
- Published
- 2016
- Full Text
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34. Dust in the Ocean
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Guieu, Cécile, primary and Shevchenko, Vladimir P., additional
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- 2016
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35. Subsurface iron accumulation and rapid aluminum removal in the Mediterranean following African dust deposition
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Bressac, Matthieu, primary, Wagener, Thibaut, additional, Leblond, Nathalie, additional, Tovar-Sánchez, Antonio, additional, Ridame, Céline, additional, Taillandier, Vincent, additional, Albani, Samuel, additional, Guasco, Sophie, additional, Dufour, Aurélie, additional, Jacquet, Stéphanie H. M., additional, Dulac, François, additional, Desboeufs, Karine, additional, and Guieu, Cécile, additional
- Published
- 2021
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36. Phosphorus cycling in the upper waters of the Mediterranean Sea (PEACETIME cruise): relative contribution of external and internal sources
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Pulido-Villena, Elvira, primary, Desboeufs, Karine, additional, Djaoudi, Kahina, additional, Van Wambeke, France, additional, Barrillon, Stéphanie, additional, Doglioli, Andrea, additional, Petrenko, Anne, additional, Taillandier, Vincent, additional, Fu, Franck, additional, Gaillard, Tiphanie, additional, Guasco, Sophie, additional, Nunige, Sandra, additional, Triquet, Sylvain, additional, and Guieu, Cécile, additional
- Published
- 2021
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37. Influence of atmospheric deposition on biogeochemical cycles in an oligotrophic ocean system
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Van Wambeke, France, primary, Taillandier, Vincent, additional, Desboeufs, Karine, additional, Pulido-Villena, Elvira, additional, Dinasquet, Julie, additional, Engel, Anja, additional, Marañón, Emilio, additional, Ridame, Céline, additional, and Guieu, Cécile, additional
- Published
- 2021
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- View/download PDF
38. Impact of dust addition on the metabolism of Mediterranean plankton communities and carbon export under present and future conditions of pH and temperature
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Gazeau, Frédéric, primary, Van Wambeke, France, additional, Marañón, Emilio, additional, Pérez-Lorenzo, Maria, additional, Alliouane, Samir, additional, Stolpe, Christian, additional, Blasco, Thierry, additional, Leblond, Nathalie, additional, Zäncker, Birthe, additional, Engel, Anja, additional, Marie, Barbara, additional, Dinasquet, Julie, additional, and Guieu, Cécile, additional
- Published
- 2021
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39. Impact of dust addition on Mediterranean plankton communities under present and future conditions of pH and temperature: an experimental overview
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Gazeau, Frédéric, Ridame, Céline, Van Wambeke, France, Alliouane, Samir, Stolpe, Christian, Irisson, Jean-Olivier, Marro, Sophie, Grisoni, Jean-Michel, De Liège, Guillaume, Nunige, Sandra, Djaoudi, Kahina, Pulido-Villena, Elvira, Dinasquet, Julie, Obernosterer, Ingrid, Catala, Philippe, Guieu, Cécile, Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Cycles biogéochimiques marins : processus et perturbations (CYBIOM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Scripps Institution of Oceanography (SIO - UC San Diego), University of California [San Diego] (UC San Diego), University of California (UC)-University of California (UC), Laboratoire d'Océanographie Microbienne (LOMIC), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Scripps Institution of Oceanography (SIO), University of California-University of California, and Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Banyuls (OOB)
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere ,[SDE]Environmental Sciences - Abstract
In low-nutrient low-chlorophyll areas, such as the Mediterranean Sea, atmospheric fluxes represent a considerable external source of nutrients likely supporting primary production, especially during periods of stratification. These areas are expected to expand in the future due to lower nutrient supply from sub-surface waters caused by climate-driven enhanced stratification, likely further increasing the role of atmospheric deposition as a source of new nutrients to surface waters. Whether plankton communities will react differently to dust deposition in a warmer and acidified environment remains; however, an open question. The potential impact of dust deposition both in present and future climate conditions was investigated in three perturbation experiments in the open Mediterranean Sea. Climate reactors (300 L) were filled with surface water collected in the Tyrrhenian Sea, Ionian Sea and in the Algerian basin during a cruise conducted in the frame of the PEACETIME project in May–June 2017. The experiments comprised two unmodified control tanks, two tanks enriched with a Saharan dust analogue and two tanks enriched with the dust analogue and maintained under warmer (+3 ∘C) and acidified (−0.3 pH unit) conditions. Samples for the analysis of an extensive number of biogeochemical parameters and processes were taken over the duration (3–4 d) of the experiments. Dust addition led to a rapid release of nitrate and phosphate, however, nitrate inputs were much higher than phosphate. Our results showed that the impacts of Saharan dust deposition in three different basins of the open northwestern Mediterranean Sea are at least as strong as those observed previously, all performed in coastal waters. The effects of dust deposition on biological stocks were different for the three investigated stations and could not be attributed to differences in their degree of oligotrophy but rather to the initial metabolic state of the community. Ocean acidification and warming did not drastically modify the composition of the autotrophic assemblage, with all groups positively impacted by warming and acidification. Although autotrophic biomass was more positively impacted than heterotrophic biomass under future environmental conditions, a stronger impact of warming and acidification on mineralization processes suggests a decreased capacity of Mediterranean surface plankton communities to sequester atmospheric CO2 following the deposition of atmospheric particles.
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- 2021
40. N2 fixation in the Mediterranean Sea related to the composition of the diazotrophic community, and impact of dust under present and future environmental conditions
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Ridame, Céline, Dinasquet, Julie, Hallstrøm, Søren, Bigeard, Estelle, Riemann, Lasse, van Wambeke, France, Bressac, Matthieu, Pulido-Villena, Elvira, Taillandier, Vincent, Gazeau, Frédéric, Tovar-Sánchez, Antonio, Baudoux, Anne-Claire, Guieu, Cécile, Cycles biogéochimiques marins : processus et perturbations (CYBIOM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Scripps Institution of Oceanography (SIO - UC San Diego), University of California [San Diego] (UC San Diego), University of California (UC)-University of California (UC), Laboratoire d'Océanographie Microbienne (LOMIC), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Observatoire océanologique de Banyuls (OOB), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Copenhagen = Københavns Universitet (UCPH), Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Institute of Marine Sciences of Andalusia (ICMAN), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Sorbonne Université (SU), Centre National de la Recherche Scientifique (CNRS), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Scripps Institution of Oceanography (SIO), University of California-University of California, Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire océanologique de Banyuls (OOB), University of Copenhagen = Københavns Universitet (KU), Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), PEACETIME project (http://peacetime-project.org), GEOTRACES, Centre National de la Recherche Scientifique (France), European Commission, Danish Council for Independent Research, and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
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[SDU]Sciences of the Universe [physics] ,[SDE]Environmental Sciences ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography - Abstract
N2 fixation rates were measured in the 0-1000ĝ€¯m layer at 13 stations located in the open western and central Mediterranean Sea (MS) during the PEACETIME cruise (late spring 2017). While the spatial variability in N2 fixation was not related to Fe, P nor N stocks, the surface composition of the diazotrophic community indicated a strong longitudinal gradient increasing eastward for the relative abundance of non-cyanobacterial diazotrophs (NCDs) (mainly 3-Proteobacteria) and conversely decreasing eastward for photo-heterotrophic group A (UCYN-A) (mainly UCYN-A1 and UCYN-A3), as did N2 fixation rates. UCYN-A4 and UCYN-A3 were identified for the first time in the MS. The westernmost station influenced by Atlantic waters and characterized by highest stocks of N and P displayed a patchy distribution of diazotrophic activity with an exceptionally high rate in the euphotic layer of 72.1ĝ€¯nmolNL-1d-1, which could support up to 19ĝ€¯% of primary production. At this station at 1ĝ€¯%PAR (photosynthetically available radiation) depth, UCYN-A4 represented up to 94ĝ€¯% of the diazotrophic community. These in situ observations of greater relative abundance of UCYN-A at stations with higher nutrient concentrations and dominance of NCDs at more oligotrophic stations suggest that nutrient conditions-even in the nanomolar range-may determine the composition of diazotrophic communities and in turn N2 fixation rates. The impact of Saharan dust deposition on N2 fixation and diazotrophic communities was also investigated, under present and future projected conditions of temperature and pH during short-Term (3-4ĝ€¯d) experiments at three stations. New nutrients from simulated dust deposition triggered a significant stimulation of N2 fixation (from 41ĝ€¯% to 565ĝ€¯%). The strongest increase in N2 fixation was observed at the stations dominated by NCDs and did not lead on this short timescale to changes in the diazotrophic community composition. Under projected future conditions, N2 fixation was either increased or unchanged; in that later case this was probably due to a too-low nutrient bioavailability or an increased grazing pressure. The future warming and acidification likely benefited NCDs (Pseudomonas) and UCYN-A2, while disadvantaged UCYN-A3 without knowing which effect (alone or in combination) is the driver, especially since we do not know the temperature optima of these species not yet cultivated as well as the effect of acidification., This study is a contribution to the PEACETIME project (http://peacetime-project.org, last access: 17 January 2022), a joint initiative of the MERMEX and ChArMEx components supported by the CNRS-INSU, IFREMER, CEA and Météo-France as part of the program MISTRALS coordinated by the INSU. PEACETIME was endorsed as a process study by GEOTRACES. Julie Dinasquet was funded by a Marie Curie Actions International Outgoing Fellowship (PIOF-GA-2013-629378). Søren Hallstrøm and Lasse Riemann were funded by grant 6108-00013 from the Danish Council for Independent Research.
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- 2021
41. Dust in the Ocean
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Guieu, Cécile, primary and Shevchenko, Vladimir Petrovitch, additional
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- 2015
- Full Text
- View/download PDF
42. Tell me what you read, I'll tell you what you are'. Relationship between environmental scanning and strategic orientation
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De Almeida, F., Pimentel, M., Chanut-Guieu, Cécile, Guieu, Gilles, Laboratoire d'Economie et de Sociologie du Travail (LEST), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Chanut-Guieu, Cécile, and Laboratoire d'économie et de sociologie du travail (LEST)
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Competitive Intelligence ,Monitoring ,Strategic orientation ,[SHS.GESTION]Humanities and Social Sciences/Business administration ,Organizational Strategy ,Organizational Environment ,[SHS.GESTION] Humanities and Social Sciences/Business administration - Abstract
International audience; This research aimed to investigate the relationship between how an organization monitors its external environment and defines its strategic orientation. These two constructs are assessed through the perception of professionals related to monitoring activities in their organizations. The approach chosen is quantitative, using the survey as research method. Data are analyzed by using descriptive statistics, non-parametric and multivariate analysis. The results indicate a relationship between external monitoring and strategic orientation: the formal search for information stood out more in analytical and prospector organizations and informal search, in reactive and defensive ones.
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- 2020
43. Atmospheric input of manganese and iron to the ocean: Seawater dissolution experiments with Saharan and North American dusts
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Mendez, Jeffrey, Guieu, Cecile, and Adkins, Jess
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- 2010
- Full Text
- View/download PDF
44. Quels modes de croissance pour les PME en hypercroissance ?
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Chanut-Guieu, Cécile and Guieu, Gilles
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entreprise ,gouvernance ,BUS000000 ,Economics ,management stratégique ,Business - Abstract
En se fondant sur la notion de paradoxes de Lewis (2000), le chapitre fait l’hypothèse que la combinaison des trois modalités de croissance (interne, externe, conjointe) permet de maintenir les tensions nécessaires à la longévité d’une trajectoire d’hypercroissance. À partir d’une revue de la littérature et de données de terrain (questionnaires et études de cas), les auteurs concluent que les opérations menées par les PME en forte croissance sont l’occasion d’apprendre sur elles-mêmes et de renouveler les rythmes et les compétences acquises. L’utilisation d’un portefeuille de modalités différentes pour croître permet à ces entreprises de se réinventer, et continuer à croître à grande vitesse. La combinaison des opérations de croissance interne, externe et conjointe peut être un moyen pour les PME en hypercroissance de dépasser les paradoxes auxquels elles ont à faire face en continuant à croître par un changement radical et permanent. Based on the notion of paradoxes (Lewis, 2000), the chapter puts the hypothesis that the combination of organic growth, acquisitions and alliances creates tensions that are necessary to maintain a hyper growth trajectory. Thanks to a review of the literature and field data (surveys and case studies), the authors conclude that the operations led by fast growing small businesses are opportunities of learning on their proper behaviour and of renewal of their paces and competences. The use of a set of various modalities of growth helps such firms to re-invent themselves and to continue rapid growth. The combination of organic growth, acquisitions and alliances could be a means for high-growth small businesses to go beyond the paradoxes they have to cope with, because this combination creates radical and permanent changes.
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- 2021
45. Contrasted release of insoluble elements (Fe, Al, rare earth elements, Th, Pa) after dust deposition in seawater: a tank experiment approach
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Roy-Barman, Matthieu, Foliot, Lorna, Douville, Eric, Leblond, Nathalie, Gazeau, Frédéric, Bressac, Matthieu, Wagener, Thibaut, Ridame, Céline, Desboeufs, Karine, Guieu, Cécile, Géochimie Des Impacts (GEDI), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Géochrononologie Traceurs Archéométrie (GEOTRAC), Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Tasmania [Hobart, Australia] (UTAS), Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Cycles biogéochimiques marins : processus et perturbations (CYBIOM), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), and Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
- Subjects
[SDE]Environmental Sciences - Abstract
Lithogenic elements such as aluminum (Al), iron (Fe), rare earth elements (REEs), thorium (232Th and 230Th, given as Th) and protactinium (Pa) are often assumed to be insoluble. In this study, their dissolution from Saharan dust reaching Mediterranean seawater was studied through tank experiments over 3 to 4 d under controlled conditions including controls without dust addition as well as dust seeding under present and future climate conditions (+3 ∘C and −0.3 pH). Unfiltered surface seawater from three oligotrophic regions (Tyrrhenian Sea, Ionian Sea and Algerian Basin) were used. The maximum dissolution was low for all seeding experiments: less than 0.3 % for Fe, 1 % for 232Th and Al, about 2 %–5 % for REEs and less than 6 % for Pa. Different behaviors were observed: dissolved Al increased until the end of the experiments, Fe did not dissolve significantly, and Th and light REEs were scavenged back on particles after a fast initial release. The constant 230Th/232Th ratio during the scavenging phase suggests that there is little or no further dissolution after the initial Th release. Quite unexpectedly, comparison of present and future conditions indicates that changes in temperature and/or pH influence the release of Th and REEs in seawater, leading to lower Th release and a higher light REE release under increased greenhouse conditions.
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- 2021
46. Supplementary material to "Wet deposition in the remote western and central Mediterranean as a source of trace metals to surface seawater"
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Desboeufs, Karine, primary, Fu, Franck, additional, Bressac, Matthieu, additional, Tovar-Sánchez, Antonio, additional, Triquet, Sylvain, additional, Doussin, Jean-François, additional, Giorio, Chiara, additional, Chazette, Patrick, additional, Disnaquet, Julie, additional, Feron, Anaïs, additional, Formenti, Paola, additional, Maisonneuve, Franck, additional, Rodríguez-Romero, Araceli, additional, Zapf, Pascal, additional, Dulac, François, additional, and Guieu, Cécile, additional
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- 2021
- Full Text
- View/download PDF
47. Wet deposition in the remote western and central Mediterranean as a source of trace metals to surface seawater
- Author
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Desboeufs, Karine, primary, Fu, Franck, additional, Bressac, Matthieu, additional, Tovar-Sánchez, Antonio, additional, Triquet, Sylvain, additional, Doussin, Jean-François, additional, Giorio, Chiara, additional, Chazette, Patrick, additional, Disnaquet, Julie, additional, Feron, Anaïs, additional, Formenti, Paola, additional, Maisonneuve, Franck, additional, Rodríguez-Romero, Araceli, additional, Zapf, Pascal, additional, Dulac, François, additional, and Guieu, Cécile, additional
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- 2021
- Full Text
- View/download PDF
48. Supplementary material to "N2 fixation in the Mediterranean Sea related to the composition of the diazotrophic community, and impact of dust under present and future environmental conditions"
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Ridame, Céline, primary, Dinasquet, Julie, additional, Hallstrøm, Søren, additional, Bigeard, Estelle, additional, Riemann, Lasse, additional, Van Wambeke, France, additional, Bressac, Matthieu, additional, Pulido-Villena, Elvira, additional, Taillandier, Vincent, additional, Gazeau, Frederic, additional, Tover-Sanchez, Antonio, additional, Baudoux, Anne-Claire, additional, and Guieu, Cécile, additional
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- 2021
- Full Text
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49. N2 fixation in the Mediterranean Sea related to the composition of the diazotrophic community, and impact of dust under present and future environmental conditions
- Author
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Ridame, Céline, primary, Dinasquet, Julie, additional, Hallstrøm, Søren, additional, Bigeard, Estelle, additional, Riemann, Lasse, additional, Van Wambeke, France, additional, Bressac, Matthieu, additional, Pulido-Villena, Elvira, additional, Taillandier, Vincent, additional, Gazeau, Frederic, additional, Tover-Sanchez, Antonio, additional, Baudoux, Anne-Claire, additional, and Guieu, Cécile, additional
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- 2021
- Full Text
- View/download PDF
50. Mediterranean nascent sea spray organic aerosol and relationships with seawater biogeochemistry
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Freney, Evelyn, primary, Sellegri, Karine, additional, Nicosia, Alessia, additional, Williams, Leah R., additional, Rinaldi, Matteo, additional, Trueblood, Jonathan T., additional, Prévôt, André S. H., additional, Thyssen, Melilotus, additional, Grégori, Gérald, additional, Haëntjens, Nils, additional, Dinasquet, Julie, additional, Obernosterer, Ingrid, additional, Van Wambeke, France, additional, Engel, Anja, additional, Zäncker, Birthe, additional, Desboeufs, Karine, additional, Asmi, Eija, additional, Timonen, Hilkka, additional, and Guieu, Cécile, additional
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- 2021
- Full Text
- View/download PDF
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