1. Department of Earth System Science University of California, Irvine Irvine CA USA
2. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology Cambridge MA USA
3. Global Monitoring Laboratory National Oceanic and Atmospheric Administration Boulder CO USA
4. College of Earth, Ocean, and Atmospheric Sciences Oregon State University Corvallis OR USA
5. Department of Earth and Environmental Sciences University of Rochester Rochester NY USA
6. Department of Physics and Astronomy Bowdoin College Brunswick ME USA