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Author |
Valentin Wierner |
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Title |
Couverture nuageuse et précipitations neigeuses à Dumont d’Urville |
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Master |
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2020 |
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Master's report |
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1013 |
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Bachelor's thesis |
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7743 |
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Téchiné P., G. Alory, L. Testut, L'us-imago Brest &Amp; Nouméa Et La Dt/insu Brest. |
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Title |
ROSAME / SSS – Gestion d'observations océanographiques |
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Peer-reviewed symposium |
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Year |
2020 |
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Journées Développement Logiciel (JDEV), 6-10 juillet 2020, visioconférence |
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688 |
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yes |
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7746 |
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Duc Marine |
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Title |
Déclencher par la mise à distance ? Saisir l'expérience de la salle de classe par le story telling, politique des petites histoires et retour critique sur une initiative méthodologique |
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Peer-reviewed symposium |
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2020 |
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Colloque “l’éducation en situation migratoire”, 12-13 novembre 2020, Suresnes |
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Nb: Postponed Due To Covid Crisis |
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1213 |
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yes |
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7749 |
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Author |
Charlotte Groult |
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Title |
Effet des marées sur la cryo-sismicité côtière en Antarctique |
Type |
Master |
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Year |
2020 |
Publication |
Master 2 stpe sciences de la terre, des planètes et de l’environnement filière « master excellence », université de Strasbourg |
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L’étude sismologique de la glace permet de mieux comprendre la déformation des systèmes glaciaires et leur stabilité́ dans un contexte de réchauffement climatique global. La cryosphère est très active sismiquement. De nombreux évènements comme des icequakes, des trémors glaciaires ou des évènements à l’interface glace/terre solide émanent de la base des glaciers, des marges de cisaillement, des vêlages au front des glaciers ou encore des chenaux d’eau sous- glaciaire. Nous avons observé les signaux d’une dizaine de stations sismologiques sur les côtes de l’antarctique et parmi tous les évènements visibles, un signal de quelques heures présente une forte répétabilité́ dans le temps et dans l’espace. Pour l’étudier nous avons extrait des séries temporelles d’énergie sismique sur trois stations : drv, thur, vna1 et nous avons montré sa modulation avec les forçages de marée d’abord sur l’année 2018 puis sur 8 ans à thur, 10 ans à vna1 et 20 ans à drv. Le signal d’énergie sismique présente toutes les périodicités des forçages de marée avec cependant quelques décalages temporels, indicateurs de délais de réponse du système glaciaire et d’un comportement rhéologique viscoélastique de la glace. |
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133 |
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Bachelor's thesis |
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7752 |
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Author |
Do Rosario Valentin |
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Ecological, biological and physiological effects of climate change on insect species. Master 1 EFCE, Université de Rennes 1 (Encadrement : D. Renault) |
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Master 1 |
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Year |
2020 |
Publication |
Rapport de l'université de Rennes 1 |
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136 |
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7753 |
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Author |
Chelsea Ward |
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Examining the effect of experimentally induced stress and the stress response on eye region surface temperature in wild king penguins (Aptenodytes patagonicus) (supervisors P Bize and A Lewden) |
Type |
Master 1 |
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2020 |
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119 |
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7755 |
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Author |
Moynard Fanny |
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Title |
L’exposition des insectes aux insecticides accroît-elle leur sensibilité au réchauffement climatique? Master 1 EFCE, Université de Rennes 1 (Encadrement: D. Renault) |
Type |
Master 1 |
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2020 |
Publication |
Rapport de l'université de Rennes 1 |
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136 |
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yes |
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7757 |
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Author |
Eymar-Dauphin Pauline |
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Réponses des plantes aquatiques des Iles Kerguelen à l’intensification des contraintes thermiques de leur habitat. Approche par les hypervolumes. Master 2 ECOMONT, Université de Savoie Mont-Blanc (encadrement : A.-K. Bittebiere) |
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Master 2 |
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2020 |
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Rapport de l'université de Lyon 1 |
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136 |
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yes |
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7759 |
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Author |
Lebouvier Marc |
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Title |
Retour d'expérience sur l'éradication des ongulés introduits dans les îles subantarctiques |
Type |
Conference - National - Communication |
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Year |
2020 |
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Atelier UICN France sur les espèces exotiques envahissantes en outre-mer, Fort de France, 10-13/02/2020 |
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136 |
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Bachelor's thesis |
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7770 |
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Mario Lebrato, Dieter Garbe-Schönberg, Marius N. Müller, Sonia Blanco-Ameijeiras, Richard A. Feely, Laura Lorenzoni, Juan-Carlos Molinero, Karen Bremer, Daniel O. B. Jones, Debora Iglesias-Rodriguez, Dana Greeley, Miles D. Lamare, Aurelien Paulmier, Michelle Graco, Joan Cartes, Joana Barcelos e Ramos, Ana de Lara, Ricardo Sanchez-Leal, Paz Jimenez, Flavio E. Paparazzo, Susan E. Hartman, Ulrike Westernströer, Marie Küter, Roberto Benavides, Armindo F. da Silva, Steven Bell, Chris Payne, Solveig Olafsdottir, Kelly Robinson, Liisa M. Jantunen, Alexander Korablev, Richard J. Webster, Elizabeth M. Jones, Olivier Gilg, Pascal Bailly du Bois, Jacek Beldowski, Carin Ashjian, Nejib D. Yahia, Benjamin Twining, Xue-Gang Chen, Li-Chun Tseng, Jiang-Shiou Hwang, Hans-Uwe Dahms, Andreas Oschlies |
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Title |
Global variability in seawater Mg:Ca and Sr:Ca ratios in the modern ocean |
Type |
Book Chapter |
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Year |
2020 |
Publication |
Proceedings of the National Academy of Sciences |
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Volume |
117 |
Issue |
36 |
Pages |
22281-22292 |
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Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the environment and organisms' biology facilitates their application in marine sciences. Here, we present a measured single-laboratory dataset, combined with previous data, to test the assumption of limited seawater Mg:Ca and Sr:Ca variability across marine environments globally. High variability was found in open-ocean upwelling and polar regions, shelves/neritic and river-influenced areas, where seawater Mg:Ca and Sr:Ca ratios range from ∼4.40 to 6.40 mmol:mol and ∼6.95 to 9.80 mmol:mol, respectively. Open-ocean seawater Mg:Ca is semiconservative (∼4.90 to 5.30 mol:mol), while Sr:Ca is more variable and nonconservative (∼7.70 to 8.80 mmol:mol); both ratios are nonconservative in coastal seas. Further, the Ca, Mg, and Sr elemental fluxes are connected to large total alkalinity deviations from International Association for the Physical Sciences of the Oceans (IAPSO) standard values. Because there is significant modern seawater Mg:Ca and Sr:Ca ratios variability across marine environments we cannot absolutely assume that fossil archives using taxa-specific proxies reflect true global seawater chemistry but rather taxa- and process-specific ecosystem variations, reflecting regional conditions. This variability could reconcile secular seawater Mg:Ca and Sr:Ca ratio reconstructions using different taxa and techniques by assuming an error of 1 to 1.50 mol:mol, and 1 to 1.90 mmol:mol, respectively. The modern ratios’ variability is similar to the reconstructed rise over 20 Ma (Neogene Period), nurturing the question of seminonconservative behavior of Ca, Mg, and Sr over modern Earth geological history with an overlooked environmental effect. |
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0027-8424, 1091-6490 |
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7781 |
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