Andrew F Thompson¹, Mar Flexas², Sahra Kacimi³, Susan L. Howard⁴, Laurence Padman⁵, Xiaosu Xie³, Monica M. Wilhelmus⁶, James Morison⁷ and Ron Kwok⁸, (1)Caltech, Pasadena, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (4)Earth and Space Research, Seattle, United States, (5)Earth & Space Research, Corvallis, United States, (6)Brown University, Center for Fluid Mechanics, School of Engineering, Providence, United States, (7)Polar Science Ctr, Seattle, WA, United States, (8)Applied Physics Laboratory University of Washington, Polar Science Center, Seattle, United States