Sondage de la glace de glacier in situ pour une meilleure compréhension de la réponse orbitale du climat
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Sondage de la glace de glacier in situ pour une meilleure compréhension de la réponse orbitale du climat

The IPEV SUBGLACIOR project makes the logistical counterpart of the following scientific projects already funded : (1) the European ERC Advanced grant project ICE&LASERS 2012-2017 (coordinator : J. Chappellaz), (2) the French ANR “Blanc” project SUBGLACIOR 2012-2016 (coordinator : O. Alemany), (3) the sponsoring of the BNP Paribas foundation (SUBGLACIOR 2011-2013, coordinator : J. Chappellaz), and (4) one of the components of the Equipex project CLIMCOR (coordinator : D.D. Rousseau, INSU/C2FN). These joint projects (or component) aim at building a revolutionary probe to measure as a function of depth, inside the glacier and in real time, the water isotopic composition (climatic signal) and the concentration of greenhouse gases (methane, and eventually carbon dioxide – provided that we handle solubility effets -), without bringing an ice core at the surface. Ultimately, the probe will allow us to rapidly test the pertinence of an Antarctic site for a new deep drilling operation, similar to EPICA, to study the link between climate and greenhouse gases through the main climatic transition of the mid-Pleistocene one million years ago. In addition, the probe will already obtain – within a single field season – the first and most important signals over this period of time. The IPEV SUGLACIOR project will include in a first step two test campaigns in 2013/2014 and 2014/2015, to evaluate some technical choices currently envisaged for specific components of this probe. In 2015/2016, the full probe will be implemented at Concordia to measure the depth profile of water isotopes and greenhouse gas down to 3260 m of depth, and thus to validate the method against the results already obtained with the EPICA Dome C deep drilling. The last year of the project, 2016/2017, will be dedicated to the implementation of the SUBGLACIOR probe at a site of the East Antarctic plateau which can easily be reached from Concordia. The site will have been pre-selected by the “oldest ice” committee of the International Partnerships in Ice Core Sciences (IPICS).