1. School of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts USA
2. Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts USA
3. Science and Technology Corporation; Boulder Colorado USA
4. Physical Sciences Division, Earth System Research Laboratory; National Oceanic and Atmospheric Administration; Boulder Colorado USA
5. Chemical Sciences Division, Earth System Research Laboratory; National Oceanic and Atmospheric Administration; Boulder Colorado USA
6. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder Colorado USA
7. Department of Earth and Planetary Science, Graduate School of Science; University of Tokyo; Tokyo Japan
8. Department of Earth and Atmospheric Sciences; University of Nebraska-Lincoln; Lincoln Nebraska USA
9. Laboratory for Aviation and the Environment, Department of Aeronautics and Astronautics; Massachusetts Institute of Technology; Cambridge Massachusetts USA