Institution: | Department of Earth and Atmospheric Sciences, Snee Hall, Cornell University, Ithaca, NY 14853,;USA. E-mails:; Departments of Earth &Space Sciences, Physics &Astronomy, and Mathematics, University of California, Los Angeles, CA 90095,;USA. E-mail: Institute for Mathematics and its Applications Lind Hall, University of Minnesota, Minneapolis, MN 55455,;USA |