Predicting the Phase State of Secondary Organic Aerosol and Understanding its Influences on the Heterogeneous Ice Nucleation. YUE ZHANG, Martin Wolf, Shachi Katira, Jason Injae Jung, Abigail Koss, Peyton Spencer, Xiaoli Shen, Andrew Lee, Andrew Lambe, Wen Xu, Leonid Nichman, Yuzhi Chen, Manjula Canagaratna, Zhenfa Zhang, Avram Gold, John Jayne, Douglas Worsnop, Paul Davidovits, David Chandler, Timothy Onasch, Charles Kolb, Jesse Kroll, Jason Surratt, Daniel Cziczo, Univ. of North Carolina, Chapel Hill/Aerodyne Research, Inc.