1. Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
2. Department of Earth and Environmental Sciences, Columbia University, New York, NY, USA
3. Department of Chemical Engineering, Columbia University, New York, NY, USA
4. Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, USA
5. Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, USA
6. Microsoft Research, New York, NY, USA