1. Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
2. NOAA Global Systems Laboratory, Boulder, Colorado 80305, United States
3. Civil and Environmental Engineering University of California, Berkeley, California 94720, United States
4. U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27703, United States
5. Institute for Chemical Engineering Sciences, Foundation for Research and Technology Hellas, Patras GR-26504, Greece
6. School of Architecture, Civil & Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
7. Atmospheric Sciences Program, Department of Physics, University of Nevada, Reno, Nevada 89557, United States
8. Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, United States