Seonsik Yun^1,2, Doug A Day^1,2, Anne V Handschy^1,2, Erick Mattson³, Abigail Koss⁴, Maya Abou-Ghanem⁴, Joost A de Gouw^1,2, Roya Bahreini⁵, Ann M Dillner⁶, Armistead G Russell⁷, Nga Lee Ng⁸ and Jose L Jimenez^1,2, (1)Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, United States, (2)University of Colorado Boulder, Department of Chemistry, Boulder, United States, (3)Colorado Department of Public Health and Environment, Denver, United States, (4)Tofwerk USA, Boulder, United States, (5)University of California Riverside, Environmental Sciences, Riverside, United States, (6)University of California Davis, Air Quality Research Center, Davis, CA, United States, (7)Georgia Institute of Technology, School of Civil and Environmental Engineering, Atlanta, United States, (8)Georgia Institute of Technology Main Campus, School of Chemical and Biomolecular Engineering, School of Earth and Atmospheric Sciences, School of Civil and Environmental Engineering, Atlanta, United States