Search

Your search keyword '"Six, Delphine"' showing total 140 results
Start Over Author "Six, Delphine"
140 results on '"Six, Delphine"'

3. Spatial variability of Saharan dust deposition revealed through a citizen science campaign

Author

Dumont, Marie, primary, Gascoin, Simon, additional, Réveillet, Marion, additional, Voisin, Didier, additional, Tuzet, François, additional, Arnaud, Laurent, additional, Bonnefoy, Mylène, additional, Bacardit Peñarroya, Montse, additional, Carmagnola, Carlo, additional, Deguine, Alexandre, additional, Diacre, Aurélie, additional, Dürr, Lukas, additional, Evrard, Olivier, additional, Fontaine, Firmin, additional, Frankl, Amaury, additional, Fructus, Mathieu, additional, Gandois, Laure, additional, Gouttevin, Isabelle, additional, Gherab, Abdelfateh, additional, Hagenmuller, Pascal, additional, Hansson, Sophia, additional, Herbin, Hervé, additional, Josse, Béatrice, additional, Jourdain, Bruno, additional, Lefevre, Irene, additional, Le Roux, Gaël, additional, Libois, Quentin, additional, Liger, Lucie, additional, Morin, Samuel, additional, Petitprez, Denis, additional, Robledano, Alvaro, additional, Schneebeli, Martin, additional, Salze, Pascal, additional, Six, Delphine, additional, Thibert, Emmanuel, additional, Trachsel, Jürg, additional, Vernay, Matthieu, additional, Viallon-Galinier, Léo, additional, and Voiron, Céline, additional

Published
2023
Full Text
View/download PDF

5. A method to estimate surface mass-balance in glacier accumulation areas based on digital elevation models and submergence velocities

Author

Jourdain, Bruno, primary, Vincent, Christian, additional, Réveillet, Marion, additional, Rabatel, Antoine, additional, Brun, Fanny, additional, Six, Delphine, additional, Laarman, Olivier, additional, Piard, Luc, additional, Ginot, Patrick, additional, Sanchez, Olivier, additional, and Berthier, Etienne, additional

Published
2023
Full Text
View/download PDF

6. Supplementary material to "Spatial variability of Saharan dust deposition revealed through a citizen science campaign"

Author

Dumont, Marie, primary, Gascoin, Simon, additional, Réveillet, Marion, additional, Voisin, Didier, additional, Tuzet, François, additional, Arnaud, Laurent, additional, Bonnefoy, Mylène, additional, Bacardit Peñarroya, Montse, additional, Carmagnola, Carlo, additional, Deguine, Alexandre, additional, Diacre, Aurélie, additional, Dürr, Lukas, additional, Evrard, Olivier, additional, Fontaine, Firmin, additional, Frankl, Amaury, additional, Fructus, Mathieu, additional, Gandois, Laure, additional, Gouttevin, Isabelle, additional, Gherab, Abdelfateh, additional, Hagenmuller, Pascal, additional, Hansson, Sophia, additional, Herbin, Hervé, additional, Josse, Béatrice, additional, Jourdain, Bruno, additional, Lefevre, Irene, additional, Le Roux, Gaël, additional, Libois, Quentin, additional, Liger, Lucie, additional, Morin, Samuel, additional, Petitprez, Denis, additional, Robledano, Alvaro, additional, Schneebeli, Martin, additional, Salze, Pascal, additional, Six, Delphine, additional, Thibert, Emmanuel, additional, Trachsel, Jürg, additional, Vernay, Matthieu, additional, Viallon-Galinier, Léo, additional, and Voiron, Céline, additional

Published
2023
Full Text
View/download PDF

9. Glacier-wide seasonal and annual geodetic mass balances from Pléiades stereo images: application to the Glacier d'Argentière, French Alps.

Author

Beraud, Luc, Cusicanqui, Diego, Rabatel, Antoine, Brun, Fanny, Vincent, Christian, and Six, Delphine

Subjects
ALPINE glaciers, GLACIERS, STEREO image, DIGITAL elevation models, REMOTE-sensing images, TIME series analysis
Abstract

The increased availability of high-resolution and high-quality digital elevation models (DEMs) allows for the investigation of small-scale glaciological changes and improved precision in geodetic mass-balance estimates. However, high precision and careful methodological choices are required to retrieve glacier-wide mass changes at annual to seasonal time scales. Here, we used a 7-year time series of 12 DEMs of the Glacier d'Argentière, in the French Alps, derived from the Pléiades optical satellites to assess the ability of sub-metre stereoscopic satellite images to retrieve annual-to-seasonal mass balances. We found good agreement between the five annual and the four winter mass-balance values estimated using a geodetic method and those of in situ glaciological measurements: mean values via the geodetic method are −0.66 m w.e. and 1.47 m w.e. for annual and winter balances, respectively; mean absolute discrepancies are 0.25 m w.e. (annual) and 0.36 m w.e. (winter). Our study identified three main limitations of this methodology: (i) the intrinsic DEM precision; (ii) the lack of control over the satellite acquisition dates; and (iii) the density assumption. The consistency between the methods demonstrates the potential of short time-scale glacier mass-balance monitoring using very high-resolution satellite images. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

10. Sensitivity of Alpine glaciers to anthropogenic atmospheric forcings: case study of the Argentière glacier

Author

Clauzel, Léo, Gilbert, Adrien, Martin, Ménégoz, Gagliardini, Olivier, Six, Delphine, Gastineau, Guillaume, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Océan et variabilité du climat (VARCLIM), 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), ANR-18-CE01-0015,SAUSSURE,Glissement des glaciers et pression hydrologique sous glaciaire en relat(2018), Menegoz, Martin, and APPEL À PROJETS GÉNÉRIQUE 2018 - Glissement des glaciers et pression hydrologique sous glaciaire en relat - - SAUSSURE2018 - ANR-18-CE01-0015 - AAPG2018 - VALID

Subjects
[SDE] Environmental Sciences, [SDE]Environmental Sciences
Abstract

This study aims at quantifying the contribution of external climate forcings on the retreat of the Argentière glacier (Mont-Blanc area). Its evolution is simulated over 1850-2014 following retrospective scenarios produced with the IPSL-CM6-LR climate model, excluding and including natural and anthropogenic forcings. These scenarios are statistically adjusted at the local scale, ensuring a preservation of the long-term trends and a physical consistency between precipitation and temperature, to finally force an ice flow model coupled with a surface mass balance scheme. The regional aerosol cooling partly counteracted the greenhouse gases warming, delaying the time of emergence of anthropogenic signals: The anthropogenic influences emerged from the natural variability in 1979 for temperature and in 2008 for the mass of the glacier, whereas its snout position in 2014 remains compatible with natural variability. We found that 66% [20-112%] of the total mass loss in 2014 since 1850 can be attributed to anthropogenic activities.

Published
2022

11. Evidence of Seasonal Uplift in the Argentière Glacier (Mont Blanc Area, France)

Author

Vincent, Christian, primary, Gilbert, Adrien, additional, Walpersdorf, Andrea, additional, Gimbert, Florent, additional, Gagliardini, Olivier, additional, Jourdain, Bruno, additional, Roldan Blasco, Juan Pedro, additional, Laarman, Olivier, additional, Piard, Luc, additional, Six, Delphine, additional, Moreau, Luc, additional, Cusicanqui, Diego, additional, and Thibert, Emmanuel, additional

Published
2022
Full Text
View/download PDF

13. Dépôts massifs de poussières sahariennes sur le manteau neigeux dans les Alpes et les Pyrénées du 5 au 7 février 2021 : Contexte, enjeux et résultats préliminaires Version du 3 mai 2021

Author

Réveillet, Marion, Tuzet, François, Dumont, Marie, Gascoin, Simon, Arnaud, Laurent, Bonnefoy, Mylène, Carmagnola, Carlo, Deguine, Alexandre, Evrard, Olivier, Flin, Frédéric, Fontaine, Firmin, Gandois, Laure, Hagenmuller, Pascal, Herbin, Hervé, Josse, Béatrice, Lafaysse, Matthieu, Le Roux, Gaël, Morin, Samuel, Nabat, Pierre, Petitprez, Denis, Picard, Ghislain, Robledano, Alvaro, Schneebeli, Martin, Six, Delphine, Thibert, Emmanuel, Vernay, Matthieu, Viallon-Galinier, Léo, Voiron, Céline, Voisin, Didier, Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), IRD/CESBIO, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Laboratoire d’Optique Atmosphérique - UMR 8518 (LOA), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 (PC2A), Université de Lille-Centre National de la Recherche Scientifique (CNRS), 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), Géochimie Des Impacts (GEDI), 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), Laboratoire Ecologie Fonctionnelle et Environnement (LEFE), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Swiss Federal Institute for Forest, Snow and Landscape Research WSL, CNRM, Université de Toulouse, Météo-France, CNRS, Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), 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), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), and Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDE]Environmental Sciences, Panoply
Published
2021

15. Geodetic point surface mass balances: a new approach to determine point surface mass balances on glaciers from remote sensing measurements

Author

Vincent, Christian, primary, Cusicanqui, Diego, additional, Jourdain, Bruno, additional, Laarman, Olivier, additional, Six, Delphine, additional, Gilbert, Adrien, additional, Walpersdorf, Andrea, additional, Rabatel, Antoine, additional, Piard, Luc, additional, Gimbert, Florent, additional, Gagliardini, Olivier, additional, Peyaud, Vincent, additional, Arnaud, Laurent, additional, Thibert, Emmanuel, additional, Brun, Fanny, additional, and Nanni, Ugo, additional

Published
2021
Full Text
View/download PDF

16. Three-dimensional surface velocity variations of the Argentière glacier (French Alps) monitored with a high-resolution continuous GNSS network

Author

Togaibekov, Anuar, primary, Walpersdorf, Andrea, additional, Gimbert, Florent, additional, Vincent, Christian, additional, Helmstetter, Agnès, additional, Six, Delphine, additional, Moreau, Luc, additional, Roldan-Blasco, Juan Pedro, additional, Ott, Laurent, additional, Mercier, Stéphane, additional, Laarman, Olivier, additional, Piard, Luc, additional, Nanni, Ugo, additional, Matthey, Marguerite, additional, Urruty, Benoit, additional, Sue, Christian, additional, Bouvier, Jean-Noël, additional, Radiguet, Mathilde, additional, Romeyer, Olivier, additional, and Mugnier, Jean-Louis, additional

Published
2021
Full Text
View/download PDF

17. Contrasting seasonal changes in temperature, precipitation and snow cover simulated over the European Alps during the twentieth century

Author

Ménégoz, Martin, primary, Beaumet, Julien, additional, Gallée, Hubert, additional, Fettweis, Xavier, additional, Morin, Samuel, additional, Blanchet, Juliette, additional, Six, Delphine, additional, Vincent, Christian, additional, Jourdain, Nicolas C., additional, Wilhelm, Bruno, additional, and Anquetin, Sandrine, additional

Published
2021
Full Text
View/download PDF

20. Reanalysing the 2007–19 glaciological mass-balance series of Mera Glacier, Nepal, Central Himalaya, using geodetic mass balance

Author

Wagnon, Patrick, primary, Brun, Fanny, additional, Khadka, Arbindra, additional, Berthier, Etienne, additional, Shrestha, Dibas, additional, Vincent, Christian, additional, Arnaud, Yves, additional, Six, Delphine, additional, Dehecq, Amaury, additional, Ménégoz, Martin, additional, and Jomelli, Vincent, additional

Published
2020
Full Text
View/download PDF

21. Geodetic point surface mass balances: A new approach to determine point surface mass balances from remote sensing measurements

Author

Vincent, Christian, primary, Cusicanqui, Diego, additional, Jourdain, Bruno, additional, Laarman, Olivier, additional, Six, Delphine, additional, Gilbert, Adrien, additional, Walpersdorf, Andrea, additional, Rabatel, Antoine, additional, Piard, Luc, additional, Gimbert, Florent, additional, Gagliardini, Olivier, additional, Peyaud, Vincent, additional, Arnaud, Laurent, additional, Thibert, Emmanuel, additional, Brun, Fanny, additional, and Nanni, Ugo, additional

Published
2020
Full Text
View/download PDF

24. Evidence of uplift at Argentière glacier (Mont Blanc area, France)

Author

Vincent, Christian, primary, Walpersdorf, Andrea, additional, Gilbert, Adrien, additional, Gagliardini, Olivier, additional, Gimbert, Florent, additional, Gillet-Chaulet, Fabien, additional, Piard, Luc, additional, Jourdain, Bruno, additional, Cusicanqui, Diego, additional, Moreau, Luc, additional, Laarman, Olivier, additional, and Six, Delphine, additional

Published
2020
Full Text
View/download PDF

27. Déclin des deux plus grands glaciers des Alpes françaises au cours du XXI e siècle : Argentière et Mer de Glace

Author

Vincent, Christian, Peyaud, Vincent, Laarman, Olivier, Six, Delphine, Gilbert, Adrien, Gillet-Chaulet, Fabien, Berthier, Etienne, Morin, Samuel, Verfaillie, Deborah, Rabatel, Antoine, Jourdain, Bruno, Bolibar, Jordi, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), University of Oslo (UiO), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), GREAT ICE, Centre d'Enseignement et de Recherche en Mathématiques et Calcul Scientifique (CERMICS), École des Ponts ParisTech (ENPC), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU]Sciences of the Universe [physics], [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology
Abstract

International audience; Des modélisations ont été réalisées sur les deux plus grands glaciers des Alpes françaises afin d'estimer leur évolution au cours du XXI e siècle. Pour un scénario climatique intermédiaire avec réduction des émissions de gaz à effet de serre avant la fin du XXI e siècle (RCP 4.5), les simulations indiquent que le glacier d'Argentière devrait disparaître vers la fin du XXI e siècle et que la surface de la Mer de Glace pourrait diminuer de 80 %. Dans l'hypothèse la plus pessimiste d'une croissance ininterrompue des émissions de gaz à effet de serre (RCP 8.5), la Mer de Glace pourrait disparaître avant 2100 et le glacier d'Argentière une vingtaine d'années plus tôt.

Published
2019

28. Ten years of temperature and wind observation on a 45-m tower at Dome C, East Antarctic plateau.

Author

Genthon, Christophe, Veron, Dana E., Vignon, Etienne, Six, Delphine, Dufresne, Jean-Louis, Madeleine, Jean-Baptiste, Sultan, Emmanuelle, and Forget, François

Subjects
PANGAEA (Supercontinent), ATMOSPHERIC boundary layer, TEMPERATURE lapse rate, KATABATIC winds, SOLAR cycle, SEASONS
Abstract

Long-term, continuous in situ observations of the near-surface atmospheric boundary layer are critical for many weather and climate applications. Although there is a proliferation of surface stations globally, especially in and around populous areas, there are notably fewer tall meteorological towers with multiple instrumented levels. This is particularly true in remote and extreme environments such as the Eastern Antarctic plateau. In the article, we present and analyze 10 years of data from 6 levels of meteorological instrumentation mounted on a 42-m tower located at Dome C, East Antarctica near the Concordia research station, producing a unique climatology of the near-surface atmospheric environment (Genthon et al., 2021,a,b). Monthly temperature and wind data demonstrate the large seasonal differences in the near-surface boundary layer dynamics, depending on the presence or absence of solar surface forcing. Strong vertical temperature gradients (inversions) frequently develop in calm, winter conditions, while vertical convective mixing occurs in the summer leading to near-uniform temperatures along the tower. Seasonal variation in wind speed is much less notable at this location than the temperature variation as the winds are less influenced by the solar cycle; there are no katabatic winds as Dome C is quite flat. Harmonic analysis confirms that most of the energy in the power spectrum is at diurnal, annual and semi-annual time scales. Analysis of observational uncertainty and comparison to reanalysis data from ERA-5 indicate that wind speed is particularly difficult to measure at this location. Data are distributed on PANGAEA data repository, see data availability section. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

29. Involvment of the Soere Cryobs-Clim (Cryosphere, an observatory of the climate - IR OZCAR) in snow and ice related hazards prevention in an alpine context

Author

Six, Delphine, Naaim-Bouvet, Florence, Schoeneich, Philippe, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Pacte, Laboratoire de sciences sociales, Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), NAAIM, florence, Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Pacte, Laboratoire de sciences sociales (PACTE), and Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
[SDE] Environmental Sciences, [SDU] Sciences of the Universe [physics], [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU]Sciences of the Universe [physics], [SDE]Environmental Sciences, [SDU.STU] Sciences of the Universe [physics]/Earth Sciences, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

31. Supplementary material to "Strong changes in englacial temperatures despite insignificantchanges in ice thickness at Dôme du Goûter glacier (Mont-Blanc area)"

Author

Vincent, Christian, primary, Gilbert, Adrien, additional, Jourdain, Bruno, additional, Piard, Luc, additional, Ginot, Patrick, additional, Mikhalenko, Vladimir, additional, Possenti, Philippe, additional, Le Meur, Emmanuel, additional, Laarman, Olivier, additional, and Six, Delphine, additional

Published
2019
Full Text
View/download PDF

34. Déclin des deux plus grands glaciers des Alpes françaises au cours du XXIe siècle : Argentière et Mer de Glace

Author

Vincent, Christian, primary, Peyaud, Vincent, additional, Laarman, Olivier, additional, Six, Delphine, additional, Gilbert, Adrien, additional, Gillet-Chaulet, Fabien, additional, Berthier, Étienne, additional, Morin, Samuel, additional, Verfaillie, Deborah, additional, Rabatel, Antoine, additional, Jourdain, Bruno, additional, and Bolibar, Jordi, additional

Published
2019
Full Text
View/download PDF

35. The European mountain cryosphere: a review of its current state, trends, and future challenges

Author

Beniston, Martin, Farinotti, Daniel, Stoffel, Markus, Andreassen, Liss M., Coppola, Erika, Eckert, Nicolas, Fantini, Adriano, Giacona, Florie, Hauck, Christian, Huss, Matthias, Huwald, Hendrik, Lehning, Michael, Lopez-Moreno, Juan-Ignacio, Magnusson, Jan, Marty, Christoph, Moran-Tejeda, Enrique, Morin, Samuel, Naaim, Mohamed, Provenzale, Antonello, Rabatel, Antoine, Six, Delphine, Stötter, johann, Strasser, Ulrich, Terzago, Silvia, Vincent, Christian., Beniston, Martin, Farinotti, Daniel, Stoffel, Markus, Andreassen, Liss M., Coppola, Erika, Eckert, Nicolas, Fantini, Adriano, Giacona, Florie, Hauck, Christian, Huss, Matthias, Huwald, Hendrik, Lehning, Michael, Lopez-Moreno, Juan-Ignacio, Magnusson, Jan, Marty, Christoph, Moran-Tejeda, Enrique, Morin, Samuel, Naaim, Mohamed, Provenzale, Antonello, Rabatel, Antoine, Six, Delphine, Stötter, johann, Strasser, Ulrich, Terzago, Silvia, and Vincent, Christian.

Abstract

The mountain cryosphere of mainland Europe is recognized to have important impacts on a range of environmental processes. In this paper, we provide an overview on the current knowledge on snow, glacier, and permafrost processes, as well as their past, current, and future evolution. We additionally provide an assessment of current cryosphere research in Europe and point to the different domains requiring further research. Emphasis is given to our understanding of climate–cryosphere interactions, cryosphere controls on physical and biological mountain systems, and related impacts. By the end of the century, Europe’s mountain cryosphere will have changed to an extent that will impact the landscape, the hydrological regimes, the water resources, and the infrastructure. The impacts will not remain confined to the mountain area but also affect the downstream lowlands, entailing a wide range of socio-economical consequences. European mountains will have a completely different visual appearance, in which low- and mid-range-altitude glaciers will have disappeared and even large valley glaciers will have experienced significant retreat and mass loss. Due to increased air temperatures and related shifts from solid to liquid precipitation, seasonal snow lines will be found at much higher altitudes, and the snow season will be much shorter than today. These changes in snow and ice melt will cause a shift in the timing of discharge maxima, as well as a transition of runoff regimes from glacial to nival and from nival to pluvial. This will entail significant impacts on the seasonality of high-altitude water availability, with consequences for water storage and management in reservoirs for drinking water, irrigation, and hydropower production. Whereas an upward shift of the tree line and expansion of vegetation can be expected into current periglacial areas, the disappearance of permafrost at lower altitudes and its warming at higher elevations will likely result in mass movements

Published
2018
Full Text
View/download PDF

37. Spatio-temporal variability of surface mass balance in the accumulation zone of the Mer de Glace, French Alps, from multitemporal terrestrial LiDAR measurements.

Author

Réveillet, Marion, Vincent, Christian, Six, Delphine, Rabatel, Antoine, Sanchez, Olivier, Piard, Luc, and Laarman, Olivier

Subjects
LIDAR, DIGITAL elevation models, VELOCITY measurements, ALPINE glaciers, GLACIERS
Abstract

Spatio-temporal variability of the winter surface mass balance is a major uncertainty in the modelling of annual surface mass balance. Moreover, its measurement at high spatio-temporal resolution (sub-200 m) is very useful to force, calibrate or validate models. This study presents the results of year-round field campaigns to study the evolution of the surface mass balance in a ~2 km2 portion of the accumulation zone of the Mer de Glace (France). It is based on repeated LiDAR acquisitions, submergence-velocity measurements and meteorological records. The two methods used to quantify submergence velocities show good agreement. They present a linear temporal evolution without significant seasonal changes but display significant spatial variability. We conclude that a dense network of submergence velocity measurements is required to reduce the uncertainties when computing winter and annual surface mass balance from digital elevation model differencing. Finally, a height spatio-temporal variability of the winter surface mass balance is highlighted (e.g., a std dev. of 0.92 m in April) even though the topography is homogeneous (std dev. of 25 m). Attempts to relate this variability to different morpho-topographic variables and wind-related indexes show the need for studies conducted at the snowfall event scale to obtain a better understanding of the variability in mass balance at the glacier scale. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

38. Reanalysing the 2007–19 glaciological mass-balance series of Mera Glacier, Nepal, Central Himalaya, using geodetic mass balance.

Author

Wagnon, Patrick, Brun, Fanny, Khadka, Arbindra, Berthier, Etienne, Shrestha, Dibas, Vincent, Christian, Arnaud, Yves, Six, Delphine, Dehecq, Amaury, Ménégoz, Martin, and Jomelli, Vincent

Subjects
GLACIERS, ALPINE glaciers, GEODESICS
Abstract

The 2007–19 glaciological mass-balance series of Mera Glacier in the Everest Region, East Nepal, is reanalysed using the geodetic mass balance assessed by differencing two DEMs obtained from Pléiades stereo-images acquired in November 2012 and in October 2018. The glaciological glacier-wide annual mass balance of Mera Glacier has to be systematically decreased by 0.11 m w.e. a−1 to match the geodetic mass balance. We attribute part of the positive bias of the glaciological mass balance to an over-estimation of the accumulation above 5520 m a.s.l., likely due to a measurement network unable to capture its spatial variability. Over the period 2007–19, Mera Glacier has lost mass at a rate of −0.41 ± 0.20 m w.e. a−1, in general agreement with regional averages for the central Himalaya. We observe a succession of negative mass-balance years since 2013. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

39. CRYOBS-CLIM: the CRYosphere, an OBServatory of the CLIMate

Author

Six, Delphine, Naaim-Bouvet, F., Schoeneich, Philippe, Institut des Géosciences de l’Environnement (IGE), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Pacte, Laboratoire de sciences sociales (PACTE), Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Pacte, Laboratoire de sciences sociales, and Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
monitoring, glacier, [SDU]Sciences of the Universe [physics], [SDE]Environmental Sciences, snow, ice sheet, permafrost
Abstract

International audience; The SOERE CRYOBS-Clim aims at gathering monitoring strategies and observations performed on mountain glaciers, polar ice-sheets, seasonal snow cover and mountain permafrost in different regions (European Alps, tropical Andes, Himalayas, Antarctica,Svalbard).It addresses major societal issues such as water resources, ice-related hazards, atmospheric processes, avalanches, sea level rise, global climate change, …The observation strategy is based on in-situ (automated and manual) and remote (photogrammetry, LiDAR, satellite) monitoring of snow and ice related variables, which are conducted at different spatial scales (from tens of square meters to tens of square kilometers) and different time scales (from hourly to decadal) depending on the observation purpose. Many variables of interest are challenging to measure, requiringthe developments of innovative technology.An overview of data, new technologies and examples of significant results obtained in he framework of CRYOBS-CLIM will be given in the presentation.

Published
2017

40. Involvment of the SOERE CRYOBS-CLIM (CRYosphere, an OBServatory of the CLIMate) in snow and ice related hazards prevention

Author

Six, Delphine, Naaim-Bouvet, F., Schoeneich, Philippe, Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Erosion torrentielle neige et avalanches (UR ETGR (ETNA)), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Pacte, Laboratoire de sciences sociales, Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut national des sciences de l'Univers (INSU - CNRS), Pacte, Laboratoire de sciences sociales (PACTE), Sciences Po Grenoble - Institut d'études politiques de Grenoble (IEPG)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Irstea Publications, Migration, Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and NAAIM, florence

Subjects
[SDU] Sciences of the Universe [physics], [SDE] Environmental Sciences, ice related hazard, [SDU]Sciences of the Universe [physics], [SDE]Environmental Sciences, water ressources, ALPES FRANCAISES, Avalanche
Abstract

International audience; The SOERE CRYOBS-Clim aims at gathering monitoring strategies and observations performed on mountain glaciers, polar ice-sheets, seasonal snow cover and mountain permafrost in different regions (European Alps, tropical Andes, Himalayas, Antarctica, Svalbard). The monitoring and research topics consist in documenting and studying: i) Ice, water, and vapor mass fluxes (precipitation, snow transport, melt ...) mainly at the interface with the atmosphere. ii) Radiative and turbulent energy fluxes between the atmosphere and the surface, and the thermodynamic variables of the boundary layer. iii) The internal state of subsurface systems (temperature, conductivity, density, liquid water content, etc.) and the resulting continental water mass storage (water resource, sea-level). iv) Ice dynamics It addresses major societal issues such as water resources, ice-related hazards, atmospheric processes, avalanches, sea level rise and ocean circulation, global climate change. Significant examples obtained in the framework of CRYOBS-CLIM will be given in the presentation : water ressources in the Andes, blowing snow forecast related to avalanche hazard, glacial destabilization (including rock glaciers) in the French Alps...

Published
2017

41. OZCAR: the French network of Critical Zone Observatories: principlesand scientific objectives

Author

Braud, Isabelle, Gaillardet, Jerome, Hankard, Fatim, Le Borgne, Tanguy, Nord, Guillaume, Six, Delphine, Galy, Catherine, Laggoun-Défarge, Fatima, Tallec, Tiphaine, Pauwels, Hélène, Hydrologie-Hydraulique (UR HHLY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Institut de Physique du Globe de Paris (IPGP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-IPG PARIS-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS), Géosciences Rennes (GR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Centre National de la Recherche Scientifique (CNRS), Institut des Géosciences de l’Environnement (IGE), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Centre d'études spatiales de la biosphère (CESBIO), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), European Geosciences Union, Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Biogéosystèmes Continentaux - UMR7327, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)

Subjects
[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology
Abstract

[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAU; International audience; This contribution aims at presenting the principles that underlined the creation of the OZCAR research infras-tructure, gathering various Critical Zone Observatories in France, and the scientific questions that drives theobservation settings.The Critical Zone includes the fine zone between the lower atmosphere at the top of the canopy down to thebedrock-soil interface. This lithosphere-atmosphere boundary is critical for the availability of life-sustainingresources and critical for humanity because this is the zone where we live, where we build our cities, from whichwe extract our food and our water and where we release most of our wastes. This is the fragile zone on which thenatural ecosystem relies because this is where nutrients are being released from the rocks.OZCAR is a distributed research infrastructure gathering instrumented sites and catchments on continentalsurfaces all dedicated to the observation and monitoring of the different compartments of the Critical Zone atthe national scale. All these observatories (more that 40) were all built up on specific questions (acid deposition,flood prediction, urban hydrology. . . ), some of them more than 50 years ago, but they have all in common tobe highly instrumented, permanently funded as infrastructures. They all share the same overarching goal ofunderstanding and predicting the Critical Zone in a changing world. OZCAR gathers instrumented catchments,hydrogeological sites, peatlands, glacier and permafrost regions and a spatial observatory under the commonumbrella of understanding water and biogeochemical cycles and the associated fluxes of energy by using naturalgradients and experimentation. Based on the collaboration with Southern Countries, OZCAR’s sites have a globalcoverage including tropical areas and high mountainous regions in the Andes and the Himalaya.OZCAR benefits from a French investments project called CRITEX (Innovative equipment for the critical zone,https://www.critex.fr/critex-3/observatories/ ) that is centered on the development and deployment of innovativeinstrumentation in the sites.OZCAR was launched in 2016 under the leadership of the French Ministry in charge of Higher Education andResearch, assembling all French Research Institutions involved in environmental studies and with the ambitionof facilitating interdisciplinary research in terrestrial surfaces, stimulating instrumental development and beingvisible at the international level.The paper will presents the main common scientific questions, challenges in terms of instrumentation andexperimentation deployment, in particular in terms of co-location of sites, data base and modelling activities thatthe OZCAR network plan to address in the next years.

Published
2017

43. Multi-Criteria Evaluation of Snowpack Simulations in Complex Alpine Terrain Using Satellite and In Situ Observations

Author

Revuelto, Jesús, primary, Lecourt, Grégoire, additional, Lafaysse, Matthieu, additional, Zin, Isabella, additional, Charrois, Luc, additional, Vionnet, Vincent, additional, Dumont, Marie, additional, Rabatel, Antoine, additional, Six, Delphine, additional, Condom, Thomas, additional, Morin, Samuel, additional, Viani, Alessandra, additional, and Sirguey, Pascal, additional

Published
2018
Full Text
View/download PDF

45. The European mountain cryosphere: a review of its current state, trends, and future challenges

Author

Beniston, Martin, primary, Farinotti, Daniel, additional, Stoffel, Markus, additional, Andreassen, Liss M., additional, Coppola, Erika, additional, Eckert, Nicolas, additional, Fantini, Adriano, additional, Giacona, Florie, additional, Hauck, Christian, additional, Huss, Matthias, additional, Huwald, Hendrik, additional, Lehning, Michael, additional, López-Moreno, Juan-Ignacio, additional, Magnusson, Jan, additional, Marty, Christoph, additional, Morán-Tejéda, Enrique, additional, Morin, Samuel, additional, Naaim, Mohamed, additional, Provenzale, Antonello, additional, Rabatel, Antoine, additional, Six, Delphine, additional, Stötter, Johann, additional, Strasser, Ulrich, additional, Terzago, Silvia, additional, and Vincent, Christian, additional

Published
2018
Full Text
View/download PDF

47. Meteorological and snow accumulation gradients across Dome C, East Antarctic plateau

Author

Genthon, Christophe, Six, Delphine, Scarchilli, C., Frezzotti, M., Université Grenoble Alpes (UGA), Laboratoire de glaciologie et géophysique de l'environnement (LGGE), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Observatoire des Sciences de l'Univers de Grenoble (OSUG ), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Centre National de la Recherche Scientifique (CNRS)

Subjects
spatial gradients, surface mass balance, [SDE]Environmental Sciences, surface meteorology, Antarctic plateau
Abstract

International audience; In situ observations show that snow accumulation is ∼10% larger 25 km north than south of the summit of DomeC on the east antarctic plateau. The mean wind direction is southerly. Although a slight slope-related diverging katabatic owcomponent is detectable, the area is an essentially at (∼10 m elevation change or less) homogeneous snow surface. TheEuropean Center for Medium-range Weather Forecasts meteorological analyses data reproduce a signicant accumulationgradient and suggest that 90% of the the mean accumulation results from the 25% largest precipitation events. During theseevents, air masses originate from coastal areas in the north rather than from inland in the south. Radiative cooling condensationoccurs on the way across the dome and as the moisture reservoir is depleted less snow is dumped 25 km south than north, withlittle direct impact from the local (50-km scale) topography. Air masses are warmer on average, and warmer north than south,when originating from the coast. This marginally affects the mean temperature gradients. The moisture gradients are moreaffected because moisture is nonlinearly related to temperature: the mean atmospheric moisture is larger north than south.Signicant meteorological and hydrological gradients over such relatively small distances (50 km) over locally at regionmay be an issue when interpreting ice cores: although cores are drilled at the top of domes and ridges where the slopes andelevation gradients are minimal, they sample small surfaces in areas affected by signicant meteorological and hydrologicalspatial gradients.

Published
2016

48. Distributed vs. semi-distributed simulations of snowpack dynamics in alpine areas: case study in the upper Arve catchment, French Alps, 1989–2015

Author

Revuelto, Jesús, primary, Lecourt, Grégoire, additional, Lafaysse, Matthieu, additional, Zin, Isabella, additional, Charrois, Luc, additional, Vionnet, Vincent, additional, Dumont, Marie, additional, Rabatel, Antoine, additional, Six, Delphine, additional, Condom, Thomas, additional, Morin, Samuel, additional, Viani, Alessandra, additional, and Sirguey, Pascal, additional

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results