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Aerosol and cloud droplet number concentrations observed in marine stratocumulus

Richard J. Vong, D. S. Covert

Abstract

The relationship between measurements of cloud droplet number concentration and cloud condensation nuclei (CCN) concentration, as inferred from aerosol size spectra, was investigated at a {open_quote}clean air{close_quote}, marine site (Cheeka Peak) located near the coast of the Olympic Peninsula in Washington State. Preliminary results demonstrated that cloud droplet number increased and droplet diameter decreased as aerosol number concentration (CCN) increased. These results support predictions of a climate cooling due to any future increases in marine aerosol concentrations.

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Key concepts: Aerosol, Marine stratocumulus, Cloud condensation nuclei, Atmospheric sciences, Environmental science, Sea salt aerosol, Liquid water content, Condensation