Overview of the French contribution to the EMEP 2012-2013 summer and winter campaigns

The EMEP network aims at providing scientific supporton atmospheric monitoring and modelling, emissioninventories and projections, and integrated assessmentmodelling. To reach these objectives, it has encouragedlong- and short-term measurement periods in order toimprove the scientific knowledge on PM levels, sourcesand formation processes at the European scale.Within this framework and in coordination withthe existing ChArMEx French program and ACTRIS EUproject, two intensive periods have been held betweenJune 8 and July 12, 2012 for summer and January 11 toFebruary 8, 2013 for winter. Five locations in France (cf.Figure 1) were equipped with various on-line and offlineinstruments (cf. Table 1) aiming at measuring PMchemical and physical properties, as well as precursorgases (both organic and inorganic).The main objectives of these two campaigns wereto (i) provide a large quality controlled database of PMlevels and chemical composition for sites under rural,mid-altitude, urban or marine influences during twocontrasted seasons; (ii) measure simultaneously PMcompounds and their precursors to better understandprocesses such as secondary organic aerosols (SOA)formation or condensation of semi-volatile species; (iii)assess the importance of vertical exchanges in thevariability of PM ground levels, especially in case ofdust events; (iv) determine PM sources and their relativecontributions.Preliminary results will be presented anddiscussed.