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Emprego
Postdoctoral position – Migration of grounding line and stress transmission Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE), CNRS & UJF, Grenoble, France
The Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE, CNRS&UJF, Grenoble, France) is currently seeking to fill a 3-years postdoctoral research position in ice flow modelling. The work is a part of the European Union FP7 program Ice2sea, of which LGGE is a partner. Ice2sea is a consortium of European institutes funded by Europe to support an integrated scientific programme to improve understanding concerning the future glacial contribution to sea-level rise. This includes improving understanding of the processes that control, past, current and future sea-level rise, and generation of improved estimates of the contribution of glacial components to sea-level rise over the next 200 years. The programme will include targeted studies of key processes in mountain glacier systems and ice caps (e.g. Svalbard), and in ice sheets in both polar regions (Greenland and Antarctica) to improve understanding of how these systems will respond to future climate change. It will include fieldwork and remote sensing studies, and develop a suite of new, cross-validated glacier and ice-sheet model. Ice2sea will deliver these results in forms accessible to scientists, policy-makers and the general public, which will include clear presentations of the sources of uncertainty. Our aim is both, to provide improved projections of the glacial contribution to sea-level rise, and to leave a legacy of improved tools and techniques that will form the basis of ongoing refinements in sea-level projection. The aim of the 3-year postdoctoral research position is to improve ice flow models in order to represent accurately the motion of the grounding line and quantify the effect of stress transmission on the flow of outlet glaciers. The successful candidate will contribute to the development of the finite element code Elmer/Ice which solve the Stokes system without any assumption. The work will be based on a new intercomparison exercice with the aim of evaluating the efficiency of time dependent higher-order models. Based on the legacy of the ISMIP-HOM exercices (http://homepages.ulb.ac.be/~ work will also consist in studying the mesh size refinement required to capture the inclusion of specific processes in ice flow models, such as grounding line migration and basal sliding. The successful candidate will contribute in the development of a grid-size-independent friction law adapted to reproduce the basal friction induced by topographic rugosity at a scale smaller than the mesh size. The final objective is to contribute to the improvement of large scale ice sheet models, by proposing adapted parameterizations inferred at the small scale and capable to reproduce the expected behavior for larger scales. This work will be done in close collaboration with other partners of the ice2sea project, an particularly ULB, BAS and CSC. The desired qualifications are a PhD in glaciology, geophysics, or mechanics, with good programming skills in a fortran and linux environment. Knowledge on finite elements techniques is desirable. The position is for a period of 3 years and will start as soon as possible (preferably July). Applicants should email a cover letter and Curriculum Vitae at the address below. Review of the applications will begin 18 May and will continue until the position is filled. For more information, please contact: Dr. Olivier GAGLIARDINI LGGE, CNRS&UJF Este endereço de e-mail está protegido contra spam bots, pelo que o JavaScript terá de estar activado para que possa visualizar o endereço de e-mail http://www-lgge.ujf-grenoble. Tel: +33 4 76 82 42 76 Fax: +33 4 76 82 42 01 Laboratoire de Glaciologie et Géophysique de l'Environnement 54, rue Molière BP 96, 38402 Saint-Martin-d'Hères Cedex, France
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