Ion-Induced Nucleation of Sulfuric Acid and Water in the Atmosphere: Kinetic Nucleation Modeling With Measured Thermochemistry

Simulation of ion-induced nucleation in the CLOUD chamber

“…This is especially important under conditions with low growth rates. The charged cluster thermodynamics from [6,9,10] is compared to measurements done in CLOUD with an APi-TOF measuring negative polarity [13]. …”

“…To calculate the influence ionisation on binary sulphuric acid water nucleation the SAWNUC model was created [6]. Evaporation rates in the model are based on measured charged cluster thermodynamics for small clusters [9,10], bigger clusters are treated with classical thermodynamics and evaporation of intermediate charged clusters is based on interpolation.…”

“…This contribution will present the results of a comparison between the results of binary nucleation experiments in CLOUD and the Sulphuric Acid Water NUCleation model [6]. This model allows to compare the CLOUD results with previous studies on nucleation [7,8] and ion thermodynamics [9,10].…”