Ross Whiteford, Lamont Doherty Earth Observatory, New York, NY, United States, Baerbel Hoenisch, Lamont -Doherty Earth Observatory, Palisades, NY, United States, Vicki Lynn Ferrini, LDEO, Palisades, NY, United States and John J Morton, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States