Improve and validate the description of wind-blown dust presently used in the EMEP models , and carry out coordinated sensitivity studies for a common parametrization at both modelling centres ( MSC-W , MSC-W ) ; Develop and improve the parametrization of coarse nitrate and validate through comparison with the EMEP intensive campaigns ( MSC-W , CCC , Task Force ) ; Evaluate alternative methods to the calculation of water content in PM ( MSC-W ) ; Continue the analysis of the chemical composition of PM in Europe , in particular for carbonaceous contributions , differentiation between primary and secondary organic aerosols and assessment of the effect of biogenic versus anthropogenic emissions on the formation of organic aerosols ( Task Force , MSC-W , CCC ) ;