PICO, Tamara1, MITROVICA, Jerry X.2, MIX, Alan3, ROBEL, Alex4, POWELL, Evelyn2, FARMER, Jesse5 and SIGMAN, Danny6, (1)Earth & Planetary Sciences, UC Santa Cruz, Santa Cruz, CA 95064; CaltechGeological & Planetary Sciences, 20 Oxford St, Cambridge, MA 02138-2902, (2)Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, (3)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg, Corvallis, OR 97331, (4)Georgia Tech, Atlanta, GA 30332, (5)Princeton University, Princeton, NJ 08544, (6)Geosciences Department, Princeton University, Princeton, NJ 08544