This is a general open session on all aspects of Aerosol Chemistry and Microphysics. This year the session will have a focus on the description of particle phase and the effect of phase on chemical and physical particle properties.

Tropospheric aerosol particles are traditionally described to be in thermodynamic equilibrium with the surrounding gas phase, and are assumed to be in a liquid or solid state. Organic particles have been assumed to be mostly liquid under conditions relevant for the lower troposphere. However, there is increasing evidence that organic aerosol particles might be present in a glassy, highly viscous state.

Laboratory, field and theoretical contributions are encouraged, which describe the particle phase, phase changes and implications of phase on other physico-chemical particle properties. Contributions discussing the consequences of aerosol phase upon atmospheric processes such as particle-cloud interactions, particle composition and ageing are also encouraged.