Abstract Number: 1150 Working Group: Unraveling the Many Facets of Ice Nucleating Particles and Their Interactions with Clouds
Abstract Ice nuclei measurements were conducted at Haituo Mountain in northwest Beijing in 2016-2017 winters. The characteristics of wintertime ice nuclei particles (INPs), as well as their relation with meteorology elements and atmospheric aerosols were investigated with a continuous flow diffusion chamber (CFDC) and a Bigg mixing cloud chamber. Relationships between pollutants and IN number concentrations were also studied. The results showed that the concentration of Ice nuclei particles(INPs) active at -10℃~-25℃ typically ranged from 0.2#/L~64.8#/L with Bigg Chamber. The INPs active at -15℃~-35 ℃ at water supersaturation 5% ranged from 0.5#/L~362.4#/L with CFDC. The INPs active at -25 ℃ and water supersaturation -5%~5% were from 2.5 #/L ~54.9 #/L. The relationship of INPs and T match the exponential distribution, as f(T)=0.0016583*exp(-0.43353*T). INPs did not increase obviously in heavy polluted days comparing to clean days. The INPs increase after snow in 2/3 of snow cases. Of all meteorological elements, wind speed and airflow direction appeared to influence IN number concentrations.