1. Cooperative Institute for Research in Environmental Sciences; University of Colorado Boulder; Boulder CO USA
2. Earth System Research Laboratory; National Oceanic and Atmospheric Administration; Boulder CO USA
3. Now at Aerodyne Research; Billerica MA USA
4. Department of Civil and Environmental Engineering; Virginia Polytechnic Institute and State University; Blacksburg VA USA
5. Now at NASA Earth Science Division; Washington DC USA
6. Department of Earth and Atmospheric Sciences; University of Houston; Houston TX USA
7. Department of Chemistry; Hong Kong University of Science and Technology; Hong Kong
8. Département Sciences de l'Atmosphère et Génie de l'Environnement; IMT Lille Douai, University of Lille; Lille France
9. School of Public and Environmental Affairs; Indiana University; Bloomington IN USA
10. Department of Atmospheric and Oceanic Sciences; University of California; Los Angeles CA USA