Size-Resolved Measurements of Ice Nucleating Particles at North American and European Sites. RYAN H. MASON, Meng Si, Cédric Chou, Victoria Irish, Robin Dickie, Pablo Elizondo, Rachel Wong, Miranda Brintnell, Michael Elsassar, Walfried Lassar, Kyle Pierce, Kaitlyn J. Suski, Jonathan Abbatt, Paul DeMott, Thomas Hill, J. Alex Huffman, W. Richard Leaitch, Annie-Marie Macdonald, Andrew Platt, Roland Sarda-Esteve, Corinne L. Schiller, Desiree Toom-Sauntry, Allan Bertram, University of British Columbia