Accurate Representations of the Physicochemical Properties of Atmospheric Aerosols - Faraday Discussion 2017

Laboratory studies can provide important insights into the processes that occur at the scale of individual particles in ambient aerosol. We examine the accuracies of measurements of core physicochemical properties of aerosols that can be made in single particle studies and explore the impact of these properties on the microscopic processes that occur in ambient aerosol. Presenting new measurements, we examine here the refinements in our understanding of aerosol hygroscopicity, surface tension, viscosity and optical properties that can be gained from detailed laboratory measurements for complex mixtures through to surrogates for secondary organic atmospheric aerosols.

实验室研究可为揭示环境气溶胶（ambient aerosol）中单颗粒物尺度下发生的过程提供重要见解。本研究针对单颗粒研究（single particle studies）中可获取的气溶胶核心理化性质的测量精度展开分析，并探究这些性质对环境气溶胶中微观过程的影响。本文在呈现全新实验测量结果的同时，探讨通过针对从复杂混合物直至大气二次有机气溶胶（secondary organic atmospheric aerosols）替代物的精细化实验室测量，我们在气溶胶吸湿性（aerosol hygroscopicity）、表面张力（surface tension）、黏度（viscosity）与光学性质（optical properties）的认知上所取得的深化。