1. WP4.1 optical properties of other aerosol types

2. What do you want? Refractive indices, size distribution (log- normal mode parameters) etc OR Pre-calculated (from Mie code) extinction, single scattering albedo, asymmetry parameter and phase function Note, some issues with how we deal with RH depending on choice above

3. Aerosol types Components planned Ammonium sulphate (different size modes?) Ammonium nitrate Soot Mineral dust Organics Sea salt Volcanic Types planned Desert Maritime Biomass Urban? Rural continental? Polluted continental? +???

4. Timescales Original deliverable Jan 2010 But… Will try to get this done by September 2009 (i.e. pre-leave). However, will have to scale back types etc a little due to needing to work on aircraft side too….