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Université Paul Sabatier +
Toulouse +
pierre.maffre@get.omp.eu +
Pierre +
Maffre +
+33679535602 +
France +
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10:53:48, 11 January 2018 +
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I am a PhD student at the Geoscience-Envir … I am a PhD student at the Geoscience-Environment lab in Toulouse. My work consists of modeling the interaction between erosion, silicate weathering and climate at the global scale and at the geological timescale. The aim is to explain climatic variations throughout the Earth History by changes in the erosion/weathering system (such as orogenies or mountain ranges decline). Such a modeling work requires a spatial discretization of continents, as well as upscaling of smaller-scale processes due to the coarse resolution (hundred of kilometers). In the future, I would like to explore further how weathering is affected by the horizontal advection of sediments, tectonic forcings and landscape evolution. The complexity of small-scale processes and computational costs are the main limitations of this investigation. Therefore, I wish to discuss the possibilities and barriers of upscaling from the catchment scale to the continental scale: what is the appropriate scale for each process, (tectonic forcings, evolution of topography, weathering, climate…). For instance, one key issue is how well hydrographic network should be represented (for sediment routing or calculation of drainage area), and how to upscale it. Another issue is how well constrained are the existing models and to what extent a combined model at these spatial and time scales would be relevant. This meeting is a very good opportunity to have a scientific discussion about those topics. scientific discussion about those topics. +
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17:21:09, 11 January 2018 +
