Anthropogenic emissions and land use changes have modified atmospheric aerosol
concentrations and size distributions over time. Understanding preindustrial conditions and …

The importance of organic aerosol particles in the environment has been long established,
influencing cloud formation and lifetime, absorbing and scattering sunlight, affecting …

Secondary organic aerosols (SOA) are a large source of uncertainty in our current
understanding of climate change and air pollution. The phase state of SOA is important for …

Multiphase chemistry plays a vital role in the Earth system, climate, and health. Chemical
reactions, mass transport, and phase transitions between gases, liquids, and solids are …

Predicting the formation of ice in the atmosphere presents one of the great challenges in
physical sciences with important implications for the chemistry and composition of the …

Biomass burning is a major source of atmospheric particulate matter (PM) with impacts on
health, climate, and air quality. The particles and vapors within biomass burning plumes …

Particles composed of secondary organic material (SOM) are abundant in the lower
troposphere. The viscosity of these particles is a fundamental property that is presently …

Particle pH is a critical but poorly constrained quantity that affects many aerosol processes
and properties, including aerosol composition, concentrations, and toxicity. We assess PM1 …

Biomass burning is the largest combustion-related source of volatile organic compounds
(VOCs) to the atmosphere. We describe the development of a state-of-the-science model to …

Acid-catalyzed reactions between gas-and particle-phase constituents are critical to
atmospheric secondary organic aerosol (SOA) formation. The aerosol-phase state is thought …