The American Geophysical Union (AGU) Fall Meeting is the largest worldwide conference in the geophysical sciences, attracting nearly 20,000 Earth and space scientists, educators, students, and policy makers. This meeting showcases current scientific theory focused on discoveries that will benefit humanity and ensure a sustainable future for our planet. This year, AGU will hold the 45th annual Fall Meeting December 3-7, 2012 in San Francisco, California.