Impact of groundwater in earth system science


Florence Habets, Metis, University Pierre & Marie Curie, Paris, France
Bertrand Decharme, CNRS/CNRM Toulouse, France


Ground waters play a major role in the temporal and spatial availability of the water resource at the global scale. Indeed, groundwater can store large amount of water for long time period, but also, sustain wetlands and low flows with large impacts on the water cycle dynamics but also, on the interaction between the continental surface and the atmosphere. Moreover, ground waters are largely exploited for human activity, with large impact on the irrigated area, with again, some impacts on the water and energy balances of the earth. For all these reasons, groundwater modelling has been integrated in earth system models, and some of them will participate to the 6th climate model intercomparison project (CMIP6). Some other approaches are developed at the continental scale, with a finer spatial resolution.  These approaches include the connections of the ground water within the critical zone and with the atmosphere, and can be validated using some observations of the groundwater dynamic and /or of the large scale water and energy balance, which is also dependent of the anthropogenic water use.

This session welcomes presentations and discussions on how ground water systems are represented in earth system science as well as on the observation or estimation of the relationships between groundwater and the water and energy balances at large scale.

Papers that present state-of-the-art in physical modeling, parameterization, assessment, integration of the human management, and estimation of the feedback on ground waters are encouraged. Submissions may give details on processes included, modeling or observation systems, case studies, and impact.

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