Isabel Louise McCoy¹, Christopher S. Bretherton¹, Robert Wood¹, Cynthia H. Twohy², Andrew Gettelman³ and Charles Bardeen³, (1)University of Washington, Seattle, WA, United States, (2)Scripps Institution of Oceanography, La Jolla, CA, United States, (3)National Center for Atmospheric Research, Boulder, CO, United States