Richard D Ray¹, Brian K Arbic², Jean-Paul Boy³, Gary D Egbert⁴, Svetlana Erofeeva⁴, Leonid Petrov⁵ and Jay F Shriver⁶, (1)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (2)University of Michigan, Earth and Environmental Sciences, Ann Arbor, MI, United States, (3)Université de Strasbourg, CNRS, EOST, IPGS UMR 7516, Strasbourg, France, (4)Oregon State Univ, Corvallis, OR, United States, (5)NASA Goddard Space Flight Center, Falls Church, VA, United States, (6)Naval Research Laboratory, Stennis Space Center, Stennis Space Center, MS, United States