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Publisher Summary The chapter discusses the relationships among Cloud Condensation Nuclei (CCN), Aerosol Size Distribution and Ion Chemistry from Airborne Measurements. CCN are a subset of the atmospheric aerosol that serves as nuclei for cloud droplets. The number of CCN activated in a cloud depends on the supersaturation (SS), which ranges from 0.13 μm. A notable exception was in smoke advected from a forest fire. In this case, the CCN were numerous, however fewer than the measured particles. Overall, comparisons of the CCN with Ion chemistry and size distribution measurements suggest that the measured inorganic ions, mainly sulfates, organic ions, carboxylates, and dicarboxylates, determine most of the CCN activty. |
