The project EXTREMA filed in response to the tender program "Vulnérabilité : Milieu et Climat - 2006" was selected for funding by a notification dated 18 April 2007 (ANR-06-VULN-005). The duration of the project is 48 months from 1 January 2007. EXTREMA involves teams from IRSN, CEFREM, CEREGE, IFREMER, and the Laboratoire d’Aérologie du Pôle d’Océanographie de l'Observatoire Midi-Pyrénées. As a reminder, EXTREMA proposes to study, in the short and medium term, natural processes generating paroxistic flow of material and their impact on the redistribution of pollutants within the different compartments Geosphere: air, soil and rivers, coastal marine environment, marine depths.

This contractual biannual report on the activities carried out over the period June 2007- December 2007 and underlines that the activities carried out over this reference period are in line with those planned.