Dear colleagues,

We could like to draw your attention to the following session planned at the GU-CGU-GAC-MAC Joint Assembly in Montréal, Québec, Canada, May 3-7, 2015.

Geosphere-Atmosphere Gas Exchanges: from Local Processes to Continental Seepage
Several gaseous species, of primordial origin (noble gases), produced by biological/geological reactions (N2, O2, CO2, CH4 etc.), or of anthropogenic origin (SF6, CFCs), are useful tracers for quantifying exchanges between the crust and the atmosphere. Processes driving gas fluxes are multiple (barometric pumping, diffusion, water infiltration, biological reaction, etc). They can be deciphered at different temporal and spatial scales, from local scale, for micro-seepage from water bodies through the unsaturated zone, up to continental scale, to quantify sources, sinks and fluxes between surface reservoirs.

This session aims at bringing together people from various backgrounds, such as geochemistry, hydrogeology, physics, modeling… Contributions covering all aspects of gas seepage and fluxes in the subsurface – from field monitoring, development and use of new analytical techniques, to conceptual and numerical models – are welcomed. Fields of applications are groundwater dating, paleoenvironmental reconstruction, leakage from underground gas storage sites, pollution by organic contaminants, etc.

The dead-line for abstracts submission is January 14, 2015, at 11:59 PM EST.
Abstracts can be submitted at :

For more information on the meeting :
We look forward to seing you in Montréal! Don't hesitate to forward this message.

Sophie Guillon
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Matthias Brennwald
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Daniele L. Pinti
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