Front cover
Contents list
Atmospheric surfaces
Guest editors Miriam Freedman, Merete Bilde, Neil M. Donahue and Marianne Glasius introduce the Atmospheric Surfaces themed issue of Environmental Science: Processes & Impacts.
Paper
Effects of surface tension time-evolution for CCN activation of a complex organic surfactant
Time-evolving partitioning effects on surface tension and bulk water activity cancel out in Köhler predictions of CCN activation of mixed NAFA–NaCl particles.
Paper
Microphysics of the aqueous bulk counters the water activity driven rate acceleration of bromide oxidation by ozone from 289–245 K
Microphysics of the aqueous bulk counters rate acceleration of bromide oxidation by ozone at low temperatures.
Understanding interactions of organic nitrates with the surface and bulk of organic films: implications for particle growth in the atmosphere
Experiments, kinetics modeling and quantum chemical calculations are combined to probe both initial uptake and equilibrium partition coefficients for organic nitrates into various organic films.
Ice nucleation by particles containing long-chain fatty acids of relevance to freezing by sea spray aerosols
How do fatty acid particles induce freezing?
Organosulfates in aerosols downwind of an urban region in central Amazon
Aerosols in the central Amazon downwind of a city contain considerable concentrations of organic sulfate derived from isoprene, correlating with inorganic aerosol sulfate.
Emerging investigator series: exploring the surface properties of aqueous aerosols coated with mixed surfactants
Fatty acid monolayers form in a more well-ordered state upon mixing with cholesterol at the air–seawater surface.
Acidic processing of fly ash: chemical characterization, morphology, and immersion freezing
The ice nucleation activity of fly ash, a byproduct of coal combustion, depends on its composition.
Paper
Cloud droplet activation of organic–salt mixtures predicted from two model treatments of the droplet surface
A new monolayer model predicts the bulk-surface partitioning, surface composition, and thickness of droplets comprising chemically unresolved, atmospherically relevant organic aerosols.
Emission of formic and acetic acids from two Colorado soils
Soil emissions formic acid from a forest and managed lawn increase with temperature, while acetic acid emissions increase with both temperature and moisture.
Development of a hydrophilic interaction liquid chromatography (HILIC) method for the chemical characterization of water-soluble isoprene epoxydiol (IEPOX)-derived secondary organic aerosol
A developed non-thermal analytical method effectively resolves and quantifies major IEPOX-SOA components in PM2.5.
Extending surface enhanced Raman spectroscopy (SERS) of atmospheric aerosol particles to the accumulation mode (150–800 nm)
Due to their small size, measurements of the complex composition of atmospheric aerosol particles and their surfaces are analytically challenging.
Emerging investigator series: determination of biphasic core–shell droplet properties using aerosol optical tweezers
Algorithm to fit whispering gallery modes retrieves biphasic properties.
About this collection
Atmospheric surfaces are ubiquitous on all scales ranging from nanometer scale, such as the surfaces of particles, cloud droplets and ice crystals, to global scale including marine and terrestrial surfaces. This Themed Issue, Edited by ESPI Associate Editor Marianne Glasius (Aarhus University, Denmark) and Guest Editors Merete Bilde (Aarhus University, Denmark) Neil Donahue (Carnegie Mellon University, USA) and Miriam Freedman (Pennsylvania State University, USA) showcases some of the latest research in this area from a variety of leading groups. We hope you enjoy reading the papers in this collection.