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Reinhard DREWS


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Reinhard DREWS
tel +32-2-650.22.15, fax +32-2-650.22.26, rdrews@ulb.ac.be
http://homepages.ulb.ac.be/~rdrews/
Campus du Solbosch
CP160/03, avenue F.D. Roosevelt 50, 1050 Bruxelles




unités de recherche


Glaciologie (DSTE-Glaciologie)



projets


IceCon : réduction des incertitudes sur le bilan de masse des glaces antarctiques : cas du Dronning Maud Land côtier. [IceCon : constraining ice mass changes in coastal Dronning Maud Land, Antarctica.]
Le projet ICECON a pour objectif de mieux cerner les volumes de glace passés et présents ainsi que les variations d'extension de la calotte antarctique en Dronning Maud Land (DML), à l'aide d'une nouvelle série de mesures et d'observations et de modélisations de la calotte glaciaire. La connaissance des volumes passés de la calotte antarctique est cruciale car celle-ci répond encore aujourd'hui à son état antérieur, plus particulièrement celui du Dernier Maximum Glaciaire (LGM), il y à environ 18.000 ans, alors que la calotte antarctique était significativement plus développée. L'hypothèse de travail principale du projet ICECON est que, bien que la calotte se soit indéniablement considérablement étendue sur la plateforme continentale au cours du dernier maximum glaciaire en Dronning Maud Land, son extension n'a probablement pas été aussi importante que prédite précédemment par les modèles dynamiques de calotte à grande échelle. [The IceCon project aims at a better understanding of the past andpresent ice volumes and extension of the Antarctic ice sheet in Dronning MaudLand (DML) through a new series of measurements and observations inconjunction with ice sheet system modelling. Knowledge of past ice volumes areimportant, since the ice sheet is still reacting to what happened in the past,especially since the Last Glacial Maximum (LGM), roughly 18,000 years ago,when the Antarctic ice sheet was significantly bigger. IceCon's main hypothesis isthat the LGM ice sheet volume in Dronning Maud Land was not as big aspreviously predicted by large-scale ice sheet models, although it advanced as faronto the continental shelf.]

IDyRA - Ice Dynamics derived from englacial Radar reflection Architecture [IDyRA - Ice Dynamics derived from englacial Radar reflection Architecture]
IDyRA aims at improving our knowledge of the interaction between the ice sheet and the ice shelf (Antarctic grounding zones). It specifically aims at understanding the processes of subglacial melting and basal sliding by combining englacial information obtained from radio-echo sounding surveys withstate-of-the-art higher-order ice sheet models. This way, numerical ice-sheet models can be validated by reconstructing the internal layer architecture.Grounding lines are key areas in ice sheets and at present subject to much attention. IDyRA will improve the understanding of grounding line migration, ocean interaction, and the role of buttressing in east Dronning Maud Land, Antarctica, where the marine ice sheet is buttressed by numerous ice rises. Results of the project will contribute to a quantitative interpretation ofmelting under the ice shelf, its effect on ice sheet behavior and the effectof a thermohaline circulation under the ice shelf. [IDyRA aims at improving our knowledge of the interaction between the ice sheet and the ice shelf (Antarctic grounding zones). It specifically aims at understanding the processes of subglacial melting and basal sliding by combining englacial information obtained from radio-echo sounding surveys withstate-of-the-art higher-order ice sheet models. This way, numerical ice-sheet models can be validated by reconstructing the internal layer architecture.Grounding lines are key areas in ice sheets and at present subject to much attention. IDyRA will improve the understanding of grounding line migration, ocean interaction, and the role of buttressing in east Dronning Maud Land, Antarctica, where the marine ice sheet is buttressed by numerous ice rises. Results of the project will contribute to a quantitative interpretation ofmelting under the ice shelf, its effect on ice sheet behavior and the effectof a thermohaline circulation under the ice shelf.]



disciplines et mots clés déclarés


Climatologie Glaciologie Sciences de la terre et du cosmos

analyses des carottes glaciaires calottes glaciaires glaciologie gnss historique de la déglaciation ice rise modélisation modélisation de la calotte glaciaire radio-écho sondage réajustement glacio-isostatique