Multiphase chemistry experiment in Fogs and Aerosols in the North China Plain (McFAN): integrated analysis and intensive winter campaign 2018

Abstract

Fine-particle pollution associated with winter haze threatens the health of more than 400 million people in the North China Plain. The Multiphase chemistry experiment in Fogs and Aerosols in the...

Exploring the Nanostructures Accessible to an Organic Surfactant Atmospheric Aerosol Proxy

“…If aerosol composition varies within a single aerosol particle, there could be a similar spatial heterogeneity in fatty acid nanostructure, impacting aerosol processes and subsequent effects on urban air pollution and climate through variations in the time scales of aerosol trace gas uptake due to the implied viscosity differences. 33 Aerosol optical properties can vary with environment and over time 5 with aerosol light scattering and absorption contributing to radiative forcing. 2 We qualitatively found visual differences between the optically isotropic phases with cubic symmetry (close-packed inverse micellar) and optically anisotropic phases (lamellar and inverse hexagonal) (also compare Hyde, 2001); 75 the former was translucent and the latter was opaque.…”

“…Aerosol optical properties can vary with environment and over time 5 with aerosol light scattering and absorption contributing to radiative forcing. 2 We qualitatively found visual differences between the optically isotropic phases with cubic symmetry (close-packed inverse micellar) and optically anisotropic phases (lamellar and inverse hexagonal) (also compare Hyde, 2001); 75 the former was translucent and the latter was opaque.…”

“…Aerosols are emitted into the atmosphere and affect the climate and human health. , Their composition can vary with time, season, location, and environment. − Aerosol components can be broadly split into an organic and inorganic fraction. An increased organic mass fraction has been linked to poor air quality .…”

Directly measuring Fe(iii)-catalyzed SO2oxidation rate in single optically levitated droplets

“…The sulfate PM 2.5 concentration simulated with air quality models 13 were 3–4 times lower than that measured in the atmosphere. This gap has motivated many research efforts to discover the hitherto unidentified sulfate sources in polluted environments: 11,14–22 New aqueous SO 2 conversion mechanisms have been identified, and the kinetics of existing mechanisms have been updated.…”

The evolution of surface structure during simulated atmospheric ageing of nano-scale coatings of an organic surfactant aerosol proxy

“…3 This varies with time, location, season and environment. 4–7 Poor air quality has been linked with an increased organic fraction on the surface of urban particulate matter 8 and cooking emissions have been estimated to contribute 10% to PM 2.5 emissions in the UK. 9 Away from the urban environment, organic compounds have been characterised in particulate matter from biogenic sources such as remote marine 10 and forested 11 environments.…”