Chris.Flechard@rennes.inra.fr INRA UMR INRA/Agrocampus 1069 SAS   (Sol Agro - hydrosystème Spatialisation)      65, rue de St-Brieuc, CS 84215   35042 Rennes Cedex - France Tel : 02 23 48 52 22   Fax : 02 23 48 54 30

Investigations at the plot scale, field scale and landscape scale of ecosystem processes controlling emissions, surface chemical processing, and deposition of reactive nitrogen species and climate relevant gases (NH₃, HNO₃, NO_x, aerosol NH₄NO₃, N₂O, CO₂, CH₄).

Trace gas flux measurements including chamber methods, micrometeorological techniques including flux towers (aerodynamic flux-gradient, eddy covariance), vehicle-based mobile platform for dispersion plume measurements.

Monitoring of atmospheric pollutant concentrations using a range of optical, spectroscopic, wet chemistry methods, as well as low-cost passive diffusion samplers and denuder/filter systems, as part of local, regional and international observation networks.

Development of soil-vegetation-atmosphere transfer (SVAT) and inferential (dry deposition) models; modelling of chemical interactions on vegetation surfaces controlling the exchange of NH3 and other key reactive pollutants between the gaseous and condensed phases.

Publications