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Author |
Cyril Palerme |
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Title |
Étude des précipitations en Antarctique par télédétection micro-onde passive |
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2011 |
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Le bilan de masse de l'Antarctique est un facteur clé concernant l'élévation du niveau des
mers. Les différents modèles ayant contribué à la réalisation du dernier rapport IPCC prédisent
une augmentation des précipitations entre 0 et 50% en Antarctique d'ici 2100. L'acquisition de
données de terrain sur ce continent étant difficile, nous ne savons pas mesurer les événements de
précipitation, et par conséquent comment évaluer la fiabilité des différents modèles.
Néanmoins, les données micro-ondes passives pourraient permettre de détecter les chutes
de neige. Lorsque de la neige fraîche se dépose, l'émissivité du manteau neigeux augmente
généralement, ce qui devrait être repérable dans les données de température de brillance.
Cependant d'autres processus peuvent affecter l'émissivité de la neige : les variations de la
température de surface, la fonte, le vent, la formation de givre de surface... Il est donc nécessaire
de déterminer quel processus est responsable d'une augmentation de la température de brillance.
En comparant les signaux satellites aux réanalyses ERA interim et à des mesures de terrain, ce
stage a consisté à la mise au point d'une méthode permettant de détecter les chutes de neige.
Cet algorithme devrait permettre de réaliser des statistiques sur ce sujet. Les modèles
climatiques divergeant fortement sur le nombre d'évènements de précipitation par an, nous
pourrions alors évaluer la capacité des différents modèles à reproduire ce paramètre.
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1013 |
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3682 |
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Author |
C. Amory |
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Title |
ANALYSE PRELIMINAIRE DE DONNEES METEOROLOGIQUES EN
CONTEXTE GLACIAIRE. CAS DE DOME C (ANTARCTIQUE, ANNEE
2010) ET DU GLACIER D’ARGENTIERE (ALPES, FRANCE, ETE 2010) |
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2011 |
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Ce stage traite de deux cas d’étude météorologique en contexte glaciaire de haute altitude, à
Dôme C (Antarctique, 3250 m d’altitude ) et sur la glacier d’Argentière (Alpes françaises, de
2400 à 2800 m d’altitude).
L’analyse des données issues de deux stations météorologiques automatiques implantées à 25
km au Nord et au Sud du site de Dôme C pendant l’année 2010 a confirmé l’existence de
hausses ponctuelles et de grande ampleur des températures autour du site. Ces évènements
chauds ont déjà été enregistrés à Dôme C même, et leur origine est encore mal connue.
L’estimation de bilans de masse estivaux pour l’année 2010 en zone d’ablation par la méthode
degré-jour, pour deux profils transversaux du réseau de balises implantées sur le glacier
d’Argentière dans le massif du Mont-Blanc donne des résultats encourageants. Les valeurs
obtenues sont satisfaisantes comparées aux bilans de masse évalués par lecture de balises. |
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3683 |
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Sciare, J., R. Sarda-Estève, D. Baisnée, N. Bonnaire, V. Gros, Michel Legrand, Susanne Preunkert, B. Jourdain |
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Les aérosols dans l’océan Austral : Quelles origines et quels impacts sur le climat ?, IPEV Activity report, 2011. |
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2011 |
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414 |
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3732 |
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Author |
J-L. Bonne, M. Darding, M. Delmotte, B. Wastine |
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Title |
Picarro CFADS #2164 Validation Report |
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2011 |
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ICOS ATC TEST LAB Validation report, 2011. |
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439 |
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yes |
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3774 |
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Constable, A.J., Raymond B., Doust, S., Welsford, D., Koubbi, P., Post, A.L. |
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Identifying marine protected areas (MPAs) in data-poor regions to conserve biodiversity and to monitor ecosystem change: an Antarctic case study. CCAMLR WS-MPA-11:5 |
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2011 |
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58 pp |
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report submitted for the CCAMLR MPA workshop in IPEV in 2011 |
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1142 |
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635 |
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Koubbi, P., Hosie G., Constable, A., Raymond, B., Moteki, M., Améziane, N., Causse, R., Fuentes, V., Heerah, K., Penot, F., Vincent, D., Ancel, A., Bost, C.A., Eléaume, M., Lindsay, D., Lindsay, M., Cottin, M., Charrassin, J.B., Ropert-Coudert, Y., Toda, R., Grossmann, M., Hopcroft, R., Ozouf-Costaz, C. and Zimmer, I. and CEAMARC experts. |
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Estimating the biodiversity of the shelf and oceanic zone of the d’Urville Sea (East Antarctica) for ecoregionalisation using the CEAMARC (Collaborative East Antarctic Marine Census) CAML surveys. CCAMLR WS-MPA-11/7. |
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2011 |
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report submitted for the CCAMLR MPA workshop in IPEV in 2011 |
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1142 |
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646 |
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Author |
Favier V., C. Genthon, et C. Agosta |
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Title |
L'observatoire GLACIOCLIM-SAMBA: les variations du bilan de masse de surface comme indicateur du changement climatique |
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2011 |
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Rapport d'activité 2010: campagnes d'été 2010/2011 |
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41-45 |
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Initié en 2004, le programme GLACIOCLIM-SAMBA est le volet Antarctique du SO/SOERE GLACIOCLIM, destiné à détecter, surveiller et comprendre l'évolution du climat et du bilan de masse en milieu glaciaire. Il s’agit d’un réseau pérenne de mesure du bilan de masse de surface dans la région de Cap Prud'homme, le long d'un transect de 156 km à proximité de la route du raid logistique vers Dôme C, et à Concordia. Des instruments météorologiques sont aussi déployés pour analyser les processus physiques d’accumulation et d’ablation. |
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901 |
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Nadia Améziane, Marc Eléaume, Patrice Pruvost, Guy Duhamel and Kerguelen group. |
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Estimating the biodiversity and distribution of the northern part of the Kerguelen Islands slope, shelf, and shelf-break for ecoregionalisation: benthos and demersal fish. CCAMLR Marine Protected Areas Worshop, WS-MPA-11/9 |
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2011 |
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1-19. |
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1772 |
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Author |
Favier V., C. Brun, C. Palerme |
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Title |
Rapport de mission glacioclim |
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2012 |
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3849 |
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V. Jomelli, D. Verfaillie, A. Gilbert, V. Favier |
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Title |
Rapport de mission GLACIOCLIM-KESAACO |
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2012 |
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1048 |
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3851 |
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