Regensburg 2016 – scientific programme

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UP: Fachverband Umweltphysik

UP 3: Atmosphere - Aerosols

UP 3.5: Talk

Tuesday, March 8, 2016, 15:15–15:30, H41

Temperature-dependent formation of NaCl dihydrate in levitated sea salt aerosol particles — •Andreas Peckhaus, Alexei Kiselev, and Thomas Leisner — Karlsruher Institut für Technologie (KIT), Karlsruhe, Deutschland

The temperature-dependent formation of NaCl dihydrate in efflorescing pure NaCl solution droplets and synthetic sea salt aerosol (SSA) particles was investigated with an electrodynamic balance (EDB). A higher formation of NaCl dihydrate at warmer temperatures (>-20°C) was obtained for SSA particles. A possible mechanism triggering the formation of NaCl dihydrate in SSA particles is discussed. Furthermore a comprehensive derivation of the temperature-dependent homogeneous nucleation rate coefficients for pure NaCl solution droplets is given and used to reconcile previous results.