Mass-based hygroscopicity parameter interaction model and measurement of atmospheric aerosol water uptake

E. Mikhailov, V Merkulov, S. Vlasenko, D. Rose, U. Poschl

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

Abstract. In this study we derive and apply a mass-based hygroscopicity parameter interaction model for efficient description of concentration-dependent water uptake by atmospheric aerosol particles. The model approach builds on the single hygroscopicity parameter model of Petters and Kreidenweis (2007). We introduce an observable mass-based hygroscopicity parameter κm, which can be deconvoluted into a dilute intrinsic hygroscopicity parameter (κm,∞) and additional self- and cross-interaction parameters describing non-ideal solution behavior and concentration dependencies of single- and multi-component systems. For sodium chloride, the κm-interaction model (KIM) captures the observed concentration and humidity dependence of the hygroscopicity parameter and is in good agreement with an accurate reference model based on the Pitzer ion-interaction approach (Aerosol Inorganic Model, AIM). For atmospheric aerosol samples collected from boreal rural air and from pristine tropical rainforest air (secondary organic
Язык оригиналаанглийский
Страницы (с-по)30877–30918
ЖурналAtmospheric Chemistry and Physics Discussions
Номер выпуска11
DOI
СостояниеОпубликовано - 2011

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