Prediction of CCN number concentration using Measurements of Aerosol Size Distributions and Composition and Light Scattering Enhancement due to Humidity

1 Atmospheric Science Department, Colorado State University, Fort Collins, Colorado, USA 2 NOAA Earth System Research Laboratory, Boulder, Colorado, USA 3 CIRES, University of Colorado, Boulder, Colorado, USA School of Earth, Atmospheric and Environmental Sciences, University of Manchester, UK 5 Dept. Chemistry and Biochemistry, University of Colorado Boulder, Colorado, USA 6 Dept. of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, Colorado, USA 7 Dept. of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA