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Akinori Takahashi, Jean-Baptiste Thiebot, Yuuki Watanabe, Thierry Raclot, Yan Ropert-Coudert |
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Migratory movements and winter diving behaviour of Adélie penguins from two East Antarctic colonies |
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2017 |
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6th international bio-logging science symposium, konstanz, germany, 25-29/09/2017 |
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1091 |
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7536 |
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Thiebot JB, Arnould JPY, Mattern T, Ropert-Coudert Y, Sala JE, Takahashi A |
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Title |
Jellyfish and other gelata as food for four penguin species: insights from predator-borne videos |
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2017 |
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6th international bio-logging science symposium, konstanz, germany, 25-29/09/2017 |
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1091 |
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7538 |
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Margot Minju, Arnould- Pétré, Charlène Guillaumot, Bruno Danis, Thomas Saucède |
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Modelling the response of Abatus cordatus, an endemic sea urchin of the Kerguelen Islands, to a changing environment |
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2019 |
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Deb 2019, sixth international symposium and thematic school on deb theory for metabolic organization, 1-12 april 2019, brest, france |
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1044 |
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7543 |
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Gadea A., Le Lamer A.-C., Fanuel M., Boustie J., Lohezic-Le Dévéhat F., Charrier M. |
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Overcoming specialized metabolites by gaining essential nutrients: a lichen/snail case study. Sfécologie2018, International Conference of Ecological Sciences, Rennes, France, 22-25/10/2018 |
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2018 |
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7590 |
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Alliouane S., Fin J., Metzl N., Posner U., Fischer P. And Gattuso J.-p. |
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Title |
Carbonate system time-series in the coastal Arctic |
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Poster |
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2019 |
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Imber future oceans2, 17-21 June 2019, Brest, France |
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Predictions of the impact of global and climate changes in the oceans requires time-series data to detect internal variability, build realistic scenarios as well as parametrize and validate models. The Arctic ocean is subject to high rates of ocean warming and acidification, which has critical implications for marine organisms, ecosystems, and ecosystem services. Yet, only few measurements of the carbonate system have been performed in the Arctic Ocean and they are spotty both in space and in time. Notably, there is no time-series station measuring the carbonate chemistry in this region, particularly in coastal waters. In its 2013 assessment, the Arctic Monitoring and Assessment Programme (AMAP) stated “It is of paramount importance that long-term, dedicated marine carbonate system observation programs are developed”.
The Alfred Wegener Institute for Polar and Marine Research (AWI) together with the Helmholtz Centre for Coastal Research Geesthacht (HZG) and the French Polar Institute (IPEV) teamed up in 2015 to establish the first time-series of carbonate system parameters in the coastal Arctic (AWIPEV-CO2). This station, located at Ny-Ålesund (Spitsbergen) at 12 m depth, benefits from a lot of ancillary data from the AWIPEV FerryBox (http://bit.ly/2Dzqjsg). The following parameters have progressively been added in the past three years: discrete total alkalinity and dissolved inorganic carbon (once a week), pCO2 (every min), in situ and FerryBox pH (every min), and discrete spectrophotometric pH (once a month to calibrate the sensors). There are also attempts to get high frequency measurements of total alkalinity (every 90 min). Data are available in near-real-time (http://bit.ly/2DwByln).
This presentation will provide a broad overview of the challenges involved with Arctic time-series and will provide information on four key questions this data set could help answer: (1) What is the seasonal variability (there are very few winter data in the Arctic)?; (2) What is the rate of acidification in a high Arctic fjord ?; (3) What are the combined effects of changes in the carbonate chemistry, temperature and salinity on the calcium carbonate saturation state?; (4) What is the annual balance of air-sea-CO2 fluxes? |
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1141 |
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7607 |
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Crouzet N., Mékarnia D., Guillot T., Bayliss D., Deeg H., Palle E., Abe L., Agabi A., Rivet J.-P., Schmider F.-X., Murgas F., Gillon M., Delrez L., Jehin E., Espinoza N. |
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Searching for long period transiting exoplanets with ASTEP South at Dome C, Antarctica |
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2019 |
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Extreme Solar Systems IV, #ExSS4, 19-23 August, Reykjavik, Iceland |
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1066 |
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7833 |
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N. Crouzet, et al. |
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Searching for transiting exoplanets with ASTEP at Dome C, Antarctica |
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2019 |
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ESA Space Science Workshop SSW#12, 12-14 November 2019, Aranjuez, Spain |
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7832 |
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Denis Mercier, Armelle Decaulne, Emilie Portier, Etienne Cossart |
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Title |
La datation des glissements de terrain paraglaciaires en Islande |
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2022 |
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7th conference Climat & impacts, 23-25 novembre 2022, Gif-sur-Yvette, France (hal-03867107) |
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Holocene Climatic Changes Landslides Paraglacial adjustment Rock slope failures |
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La fonte des glaciers islandais à partir de 15ka a été suivi par des ajustements paraglaciaires dont les glissements de terrain représentent une des manifestations les plus emblématiques. Un travail d’inventaire de leur répartition spatiale permet de comptabiliser plusieurs centaines de glissements, dont 158 dans la région du Skagafjörður au Nord de l’île, 186 dans les Westfjords et 290 dans les fjords de l’est. Les logiques spatiales de leur répartition permettent de montrer un contrôle lithologique à l’échelle globale avec une surreprésentation des glissements dans les basaltes d’âge tertiaire dans des régions où les contrastes topographiques sont par ailleurs majeurs à l’échelle de l’île. Au-delà de ces éléments spatiaux, la question de l’âge de leur mise en place se pose. Si l’on compare la chronologie de la déglaciation de l’Islande avec la répartition spatiale des glissements, nous observons une décroissance de l’occurrence potentielle des glissements de terrain avec le temps. La majorité des glissements se localisent le long des versants qui ont été libérés au tout début de la déglaciation. A l’échelle des glissements eux-mêmes, des études ponctuelles permettent de préciser l’âge de leur mise en place. Différentes approches sont alors mobilisées. La première prédate les glissements en utilisant l’emboîtement des formes géomorphologiques et l’âge des plages soulevées par le rebond glacio-isostatiques sur lesquelles viennent mourir les dépôts des glissements de terrain. La seconde série de mesures postdate les glissements. En effet, des dépressions au sein des glissements ont piégé des cendres volcaniques datées et des végétaux piégés dans des tourbières. Ainsi, par téphrochronologie et datation radiocarbone, il est possible d’obtenir des dates pour caler les événements gravitaires. Les modèles âge-profondeur sont également utilisés pour affiner les résultats. Ainsi, les glissements de terrain islandais, datés avec plus ou moins de précisions, donnent des âges postglaciaires compatibles avec le schéma d’une mise en place paraglaciaire dans les tous premiers temps de l’Holocène. |
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8468 |
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Chattova B., Van de Vijver B., Lebouvier M., De Smet W., Uher B. |
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Freshwater diatoms of Ile Amsterdam (TAAF, Southern Indian Ocean) |
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2011 |
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European journal of phycology, fifth european phycological congress, rhodes, greece, 4–9 september 2011 submit an article journal homepage 2011 |
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46 |
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Sup1 |
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20967-0262 |
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8715 |
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Hureau J.C. |
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Un antigel dans le sang des poissons. |
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1993 |
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GEO |
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170 |
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192-193 |
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1144 |
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