[1] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA
[3] Univ Colorado, Dept Atmospher & Ocean Sci, Boulder, CO 80309 USA
[4] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA
[5] Natl Ctr Atmospher Res, Boulder, CO 80307 USA
[6] NASA, Langley Res Ctr, Hampton, VA 23665 USA
[7] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA
[8] Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA
[9] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
[10] Univ Innsbruck, Inst Ionenphys & Angew Phys, A-6020 Innsbruck, Austria
[11] Univ Miami, Rosenstiel Sch Marine & Atmospher Chem, Miami, FL 33149 USA
[12] Natl Inst Aerosp, Hampton, VA USA