10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Effect of Solutes on Ice Nucleation Efficiency of Feldspar
JINGWEI YUN, Jon Davidson, Allan Bertram, University of British Columbia
Abstract Number: 1095 Working Group: Unraveling the Many Facets of Ice Nucleating Particles and Their Interactions with Clouds
Abstract Mineral dust particles are abundant in the atmosphere. When these particles are immersed in cloud droplets they can catalyze the nucleation of the ice phase. One type of mineral dust particle that is especially good at nucleating the ice phase is microcline (a potassium-rich feldspar) (Atkinson et al., 2013). When mineral dust particles are immersed in cloud droplets, organic and inorganic solutes are typically present. Our work focuses on the effect of these organic and inorganic solutes on the freezing properties of microcline immersed in droplets. Experiments were carried out with the droplet freezing technique as described in Whale et al. (2015). A range of organic and inorganic solutes was studied including a series of inorganic nitrates. The results show that the studied solutes have a larger effect on the freezing properties of microcline than expected from freezing point depression caused by solutes. Results from these studies will be presented and discussed.