1. Scripps Institution of Oceanography University of California San Diego La Jolla CA 92037 USA
2. Department of Earth System Science Stanford University Stanford CA 94305 USA
3. Daniel Guggenheim School of Aerospace Engineering Georgia Institute of Technology Atlanta GA 30332 USA
4. School of Earth and Atmospheric Studies Georgia Institute of Technology Atlanta GA 30332 USA
5. Department of Geology and Geophysics Louisiana State University Baton Rouge LA 70803 USA
6. Department of Biology Georgetown University Washington DC 20057 USA
7. Blue Marble Space Institute of Science Seattle WA 98154 USA