Seth Saltiel, Lamont Doherty Earth Observatory, New York, United States, Christine Mccarthy, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States, Heather M Savage, Lamont-Doherty, Palisades, NY, United States and Michael Nielson, Lamont -Doherty Earth Observatory, Palisades, NY, United States