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Images from 19th International Conference on Nucleation and Atmospheric Aerosols, June 24th-28th, 2013, Fort Collins, CO, USA. Information on 20th conference (ICNAA 2017) is now available here -->

The Committee on Nucleation and Atmospheric Aerosols brings together scientists covering the following subject areas:

Nucleation Theory & Experiment: Studies of homogeneous, heterogeneous and ion induced nucleation including single or multicomponent system cluster formation and properties, condensation, and evaporation, and experimental, theoretical and computational investigations.

Tropospheric & Stratospheric Aerosols: Fundamental processes associated with tropospheric and stratospheric aerosols, especially related to global warming, acid rain, air quality and multi-phase chemistry.  Studies into aerosol concentrations and distributions, variability and long term trends. Focus on composition, hygroscopicity, thermodynamics, phase changes, physico-chemical properties, and optical properties.

Cloud Drop and Ice Nucleation: Fundamental processes related to droplet and ice-crystal activation, growth, cloud condensation nuclei and ice nuclei origin, composition, spatial and temporal distributions and loadings, experimental and theoretical studies.

Aerosol-Climate Interactions: Direct and indirect effects of atmospheric aerosols on radiative forcing and climate, remote sensing and regional to global scale climate modelling of aerosol impacts and feedback systems.

The CNAA is a committee of the International Association of Meteorology and Atmospheric Sciences (IAMAS, a constituent association of the IUGG) that is affiliated with IAMAS's International Commission on Clouds and Precipitation (ICCP). The 20th International Conference on Nucleation & Atmospheric Aerosols (ICNAA 2017) to be held in Helsinki, Finland in June 2017 is one of a series organized by the CNAA, now at 4 year intervals. This conference is currently held one year following the ICCP’s related International Conference on Clouds and Precipitation, the next of which will be held in Manchester, UK in 2016.