1. Aerodyne
Research Inc., Billerica, Massachusetts 01821, United States
2. Cooperative
Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado 80309, United States
3. NOAA Earth System Research
Laboratory, Boulder, Colorado 80305, United States
4. University of California, Davis, California 95616, United States
5. Department
of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
6. Nanoplus Nanosystems
and Technologies GmbH, Gerbrunn 97218, Germany