1. Usual IP or STREP in atmospheric sciences ABCD A A BC Little reliance on each other

2. GEMS-aerosol is different ! ABCD A A BC GEMS-aerosol consists of many bricks which need to be assembled with each other Availability and timeliness of all partners is needed! Risk #1: delay in one deliverable delays the whole project. D GEMS-aerosol

3. Risk #2: Two GEMS projects develop aside from each other ECMWF Other GEMS partners Who is doing what at ECMWF, related to GEMS-Aerosols? - Jean-Jacques Morcrette: direct modelling, radiance direct and adjoint codes, simulations (FC) - Angela Benedetti: satellite data, error covariance matrices, simulations (AN) - Erik Andersson: overseeing data assimilation of aerosol quantities - Soumia Serrar, Johannes Flemming: emissions, link to RG - Claude Gibert: GEMS Web site - Agathe Untch, Anton Beljaars, Peter Bechtold: transport of tracers - Martin Suttie: Acquisition, archival and pre-processing of satellite data - Adrian Simmons for general feedbacks - Johannes Kaiser, link to HALO

4. WP1: Direct modelling of aerosols Partners: Informal meeting in Oslo during the AEROCOM workshop (15-17 June)