1. Purdue University, Department of Chemistry, West Lafayette, Indiana 47907, United States
2. Environmental Defense Fund, Austin, Texas 78701, United States
3. Purdue University, School of Aviation and Transportation Technology, West Lafayette, Indiana 47906, United States
4. Harvard University, Department of Earth and Planetary Sciences, Cambridge, Massachusetts 02138, United States
5. Scientific Aviation, Inc., Boulder, Colorado 80301, United States
6. Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, New York 11794, United States