Atmospheric aerosols mask a large but highly uncertain fraction of global warming, which directly translates into a wide range in projected future climates. Therefore, an accurate representation of aerosols and clouds is the foundation of any attempt to predict long-term climate change. This session invites abstracts from laboratory, observational, and modeling studies that advance process-level understanding of the chemical, microphysical, and dynamical mechanisms governing aerosol and CCN formation.

Topics of interest include:

(1) In-situ and remote observations of aerosol and CCN across troposphere and stratosphere.

(2) Modeling of preindustrial and present-day aerosol-CCN distributions and climate impacts.

(3) Development and evaluation of aerosol and CCN parameterizations.

(4) The role of dynamics (e.g., mixing, convection, and transport) in modulating aerosol and CCN formation.

(5) Oxidative chemistry leading to low volatility compounds.

(6) Molecular-level characterization of particle nucleation and growth.

(7) The effect of aerosol composition, morphology, and phase state on CCN activation.