Clarissa DeLeon, University of Arizona, Tucson, United States, Reed Espinosa, NASA Goddard Space Flight Center, Greenbelt, United States, Yukun Long, University of Arizona, Tucson, AZ, United States and Meredith Kupinski, University of Arizona, Wyant College of Optical Sciences, Tucson, United States

Aurelie Marcotte¹, Katie Moore², Bridgette Murray², James Caldwell³, Juan Flores⁴, Cruz Hinojosa⁴, Anthony Miller¹, Stefanie Martinez⁴, Michael Armen¹, Tanouir Aloui⁵, Jo Ann Burbridge⁶, Debra Walker⁶, Denae King⁷ and Grace Lewis⁸, (1)Entanglement Technologies, Inc., San Bruno, United States, (2)Achieving Community Tasks Successfully (ACTS), Houston, United States, (3)Coalition of Community Organizations (COCO), Houston, United States, (4)Environmental Community Advocates of Galena Park (ECAGP), Galena Park, United States, (5)Entanglement Technologies, Inc., SAN Bruno, United States, (6)Sunnyside Community Redevelopment Organization, Houston, United States, (7)Texas Southern University, Channelview, United States, (8)Environmental Defense Fund, Houston, United States

Yuxuan Ren¹, Christopher Ray Oxford², Dandan Zhang³, Xuan Liu⁴, Haihui Zhu⁵, Ann M Dillner⁶, Warren H White⁷, Rajan Chakrabarty⁸, Sina Hasheminassab⁹, David J Diner⁹, Emmie Le Roy¹⁰, Joshin Kumar¹¹, Valerie Viteri¹², Keyao Song¹², Clement Akoshile¹³, Omar Amador-Muñoz¹⁴, Araya Asfaw¹⁵, Rachel Ying-Wen Chang¹⁶, Diana Karam Francis¹⁷, Paterne Gahungu¹⁸, Rebecca Garland¹⁹, Michel Grutter²⁰, Prof. Jhoon Kim, Ph.D.²¹, Kristy Langerman²², Pei-Chen Lee²³, Puji Lestari²⁴, Olga Mayol-Bracero²⁵, Mogesh Naidoo¹⁹, Narendra Reddy Nelli¹⁷, Norman T. O'Neill²⁶, Sang Seo Park²⁷, Abdus Salam²⁸, Bighnaraj Sarangi²⁹, Yoav Y Schechner³⁰, Robyn Schofield³¹, Sachchida Nand Tripathi³², Eli Windwer³³, Ming-Tsang Wu³⁴, Qiang Zhang³⁵, Yinon Rudich³⁶, Michael Brauer³⁷ and Randall Martin³⁸, (1)Washington University in St Louis, St. Louis, MO, United States, (2)Washington University in St. Louis, Department of Energy, Environmental & Chemical Engineering, St. Louis, United States, (3)Washington University in St. Louis, Energy, Environmental and Chemical Engineering, St. Louis, United States, (4)Scripps Institution of Oceanography, La Jolla, United States, (5)Colorado State University, Department of Atmospheric Science, Fort Collins, United States, (6)University of California Davis, Air Quality Research Center, Davis, CA, United States, (7)University of California Davis, Davis, CA, United States, (8)Washington University in St Louis, Energy, Environmental and Chemical Engineering, St. Louis, United States, (9)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (10)Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (11)Washington University in St. Louis, Saint Louis, United States, (12)Washington University in St. Louis, St. Louis, United States, (13)University of Ilorin, Ilorin, Nigeria, (14)Universidad Nacional Autónoma de México, Mexico City, Mexico, (15)Addis Ababa University, Addis Ababa, Ethiopia, (16)Dalhousie University, Halifax, Canada, (17)Environmental and Geophysical Sciences (ENGEOS) Lab, Earth Science Department, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates, (18)University of Burundi, Bujumbura, Burundi, (19)Council for Scientific and Industrial Research, Pretoria, South Africa, (20)Universidad Nacional Autónoma de México, Centro de Ciencias de la Atmósfera, Mexico City, Mexico, (21)Yonsei University, Seoul, Korea, Republic of (South), (22)University of Johannesburg, Johannesburg, South Africa, (23)National Cheng Kung University, Tainan, Taiwan, (24)Institute of Technology Bandung, Bandung, Indonesia, (25)University of Puerto Rico, San Juan, United States, (26)University of Sherbrooke, Géomatique Appliquée, Sherbrooke, QC, Canada, (27)Ulsan National Institute of Science & Technology, Ulsan, South Korea, (28)University of Dhaka, Department of Chemistry, Dhaka, Bangladesh, (29)University of Puerto Rico Rio Piedras Campus, Environmental Science, San Juan, United States, (30)Technion - Israel Institute of Technology, Viterbi Faculty of Electrical Engineering, Haifa, Israel, (31)University of Melbourne, School of Earth Sciences and ARC Centre of Excellence for Climate Extremes, Parkville, VIC, Australia, (32)Indian Institute of Technology Kanpur, Department of Civil Engineering, Kanpur, India, (33)Weizmann Institute of Science, Rehovot, Israel, (34)Kaohsiung Medical University, Kaohsiung, Taiwan, (35)Tsinghua University, Department of Earth System Science, Beijing, China, (36)Weizmann Institute of Science, Earth and Planetary Sciences, Rehovot, Israel, (37)University of British Columbia, School of Population and Public Health, Vancouver, BC, Canada, (38)Washington University in St. Louis, Department of Energy, Environmental, & Chemical Engineering, St. Louis, United States

Lena Low, I-Ting Ku, Yong Zhou, Amy Sullivan, Derek Weber, Arsineh Hecobian, Jeffrey Lee Collett Jr and Emily Fischer, Colorado State University, Department of Atmospheric Science, Fort Collins, United States

Yuanfeng Cui, Cornell University, Civil and Environmental Engineering, Ithaca, NY, United States, Huanhuan Wang, Cornell University, Civil and Environmental Engineering, Ithaca, United States and John D Albertson, Cornell University, Ithaca, NY, United States

Nguyen T. Duc¹, Daniel Montecinos², Jay Prakash Kumar³, Sayantan Sarkar⁴, Roshan Wathore⁵, Johannes Felix Amann⁶, Julian Joppich⁶, Sumedha Lawande⁷, Rajesh Kumar Ranjan³ and Joyanto Routh⁸, (1)Linköping University, Linköping, Sweden, (2)Linköping University, Linkoping, Sweden, (3)Central University of South Bihar, Department of Environmental Science, Gaya, India, (4)Indian Institute of Technology Mandi, School of Civil and Environmental Engineering, Mandi, India, (5)CSIR-National Environmental Engineering Research Institute, Academy of Scientific and Innovative Research, Nagpur, India, (6)Saarland University, Lab for Measurement Technology, Saarbrücken, Germany, (7)Indian Institute of Technology - Mandi, School of Civil and Environmental Engineering, Mandi, India, (8)Linköping University, Department of Thematic Studies-Environmental Change, Linkoping, Sweden

Russell Chedgy¹, Magdalena Hofmann², Thomas Selvaratnam³, Jan Woźniak², Alexandre Dembicki², Peter Swinkels² and Tina Hemenway⁴, (1)Picarro, Inc., Santa Clara, CA, United States, (2)Picarro, B.V., Eindhoven, Netherlands, (3)LNI Swissgas, Versoix, Switzerland, (4)Picarro, Inc., Santa Clara, United States

Yilan Li, SUNY College of Environmental Science and Forestry, Chemistry, Syracuse, United States, Jiajue Chai, State University of New York College of Environmental Science and Forestry, Department of Chemistry, Syracuse, United States, Caroline Womack, NOAA Earth System Research Laboratory, Chemical Sciences Laboratory, Boulder, United States and Nell Schafer, NOAA, Chemical Science Laboratory, Boulder, United States

Anthony Rovinski¹, Andrew Jensen^1,2, Frozan Tahiry¹, Nicole Woodall¹, Daun Jeong^1,3, Kathryn D Kulju¹, Jordan Krechmer⁴, Megan Claflin⁵, Brian M Lerner⁵, Andrew T Lambe⁵ and Kerri Pratt⁶, (1)University of Michigan Ann Arbor, Department of Chemistry, Ann Arbor, United States, (2)Kalamazoo College, Department of Chemistry and Biochemistry, Kalamazoo, United States, (3)NOAA Chemical Sciences Laboratory, Boulder, United States, (4)Osmo Labs, PBC, Somerville, MA, United States, (5)Aerodyne Research Inc., Billerica, United States, (6)University of Michigan Ann Arbor, Department of Earth and Environmental Sciences, Ann Arbor, United States

Colette Schissel¹, David Allen², Michael Kleeman³, Sean M Raffuse⁴, Nga (Sally) Ng⁵, Haroula D Baliaka⁶, Ryan Xavier Ward⁶, John Seinfeld⁷, Richard C Flagan⁸ and Paul O Wennberg⁹, (1)University of Texas at Austin, Center for Energy and Environmental Systems Analysis, Austin, TX, United States, (2)University of Texas at Austin, Center for Energy and Environmental Systems Analysis, Austin, United States, (3)University of California Davis, Civil and Environmental Engineering, Davis, United States, (4)University of California Davis, Air Quality Research Center, Davis, United States, (5)Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, United States, (6)California Institute of Technology, Pasadena, CA, United States, (7)California Institute of Technology, Pasadena, United States, (8)California Inst Technology, Department of Chemical Engineering, Pasadena, CA, United States, (9)California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, United States

Hongjun Mao, Nankai University, Tianjian, China, Qijun Zhang, Nankai, Tianjin, CHINA and Jianfei Peng, Nankai University, College of Environmental Science and Engineering, Tianjian, China

Patricia A Cleary¹, Caroline Womack², Nell Schafer^3,4, Nathan Rose⁵, Jeremy Worden¹, Timothy Day¹, Aaron Langert¹ and Todd O'Connor¹, (1)University of Wisconsin Eau Claire, Chemistry and Biochemistry, Eau Claire, United States, (2)NOAA Earth System Research Laboratory, Chemical Sciences Laboratory, Boulder, United States, (3)Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, United States, (4)NOAA Chemical Sciences Laboratory, Boulder, United States, (5)Purdue University, School of Aviation and Transportation Technology/EAPS, West Lafayette, United States

Jiashu Ye¹, Tong WU², Huilin Liu³ and Junyu Zheng¹, (1)The Hong Kong University of Science and Technology (Guangzhou), Guangzhou, China, (2)The Hong Kong University of Science and Technology (Guangzhou), Washington, United States, (3)Southern University of Science and Technology, Shenzhen, China

Muhammed Yousuf S, Indian Institute of Technology Delhi, Civil Engineering, Hauz Khas, India and Gazala Habib, Indian Institute of Technology Delhi, Department of Civil Engineering, New Delhi, India

Xiao Zhang, Tsinghua University, School of environment, Beijing, China and Shaojun Zhang, School of Environment, Tsinghua University, Beijing, China

Joanne H Shorter¹, Tara Irene Yacovitch², Joseph R Roscioli¹, Scott C. Herndon¹, Conner Daube¹, Elizabeth Lunny¹, J Barry McManus² and David D Nelson³, (1)Aerodyne Research Inc., Billerica, United States, (2)Aerodyne Research Inc., Billerica, MA, United States, (3)Aerodyne Research Inc, Billerica, United States

Frozan Tahiry¹, Andrew Jensen^1,2, Anthony Rovinski¹, Nicole Woodall¹, Daun Jeong^1,3, Kathryn D Kulju¹, Brian M Lerner⁴, Megan Claflin⁴, Jordan Krechmer⁵, Andrew T Lambe⁴ and Kerri Pratt¹, (1)University of Michigan Ann Arbor, Department of Chemistry, Ann Arbor, United States, (2)Kalamazoo College, Department of Chemistry and Biochemistry, Kalamazoo, United States, (3)NOAA Chemical Sciences Laboratory, Boulder, United States, (4)Aerodyne Research Inc., Billerica, United States, (5)Osmo Labs PBC, Somerville, MA, United States

Ling Tsiang¹, Gabriel Quevedo¹, Santo F Colosimo², Jochen Stutz³, Catalina Tsai⁴, Yifan Yu⁵ and Olga Pikelnaya⁶, (1)University of California Los Angeles, Los Angeles, CA, United States, (2)University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States, (3)University of California Los Angeles, Department of Atmospheric and Oceanic Sciences, Los Angeles, CA, United States, (4)South Coast Air Quality Management District, Diamond Bar, CA, United States, (5)South Coast AQMD, Diamond Bar, United States, (6)University of California LA, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States

Kamlika Gupta, Indian Institute of Technology Bombay, Environmental Science and Engineering Department, Mumbai, India, Victor Wei-Chung Chang, Department of Civil Engineering, Monash University, Melbourne, VIC, Australia, Mohan Yellishetty, Monash University, Department of Civil Engineering, Melbourne, Australia and Harish C Phuleria, Indian Institute of Technology Bombay, Centre for Climate Studies, Environmental Science and Engineering Department, Mumbai, India

Amira Yassine¹, Beth Riess¹, Ellis Robinson¹, Benjamin Nault¹, Benjamin Werden¹, Mina Tehrani¹, Shivang Agarwal¹, Andrea Chiger¹, Sara Lupolt¹, Carolyn Gigot¹, Megan Claflin², Brian M Lerner², Tara Irene Yacovitch³, Harald Stark², Manjula R Canagaratna², Conner Daube², Joseph R Roscioli², Scott C. Herndon², Anita Avery², Elizabeth Lunny², Thomas A Burke¹, Ana Rule¹, Kirsten Koehler¹, Keeve E Nachman¹ and Peter F DeCarlo¹, (1)Johns Hopkins University, Environmental Health and Engineering, Balitmore, United States, (2)Aerodyne Research Inc., Billerica, United States, (3)Aerodyne Research Inc., Billerica, MA, United States

Daniel Blomdahl¹, Benjamin Werden², Amira Yassine^2,3, Dr. Benjamin Nault, Ph.D.⁴, Megan Claflin⁵, Grace Lewis⁶, Bria Calvin⁷, Daniel Peters⁸, Javonda Nix⁹, Femi Adesanya⁹, Beverly Wright⁹, Lauren E Padilla⁸ and Peter F DeCarlo², (1)Johns Hopkins University, Baltimore, MD, United States, (2)Johns Hopkins University, Environmental Health and Engineering, Balitmore, United States, (3)Organization Not Listed, Washington, DC, United States, (4)Johns Hopkins University, Environmental Health and Engineering, Baltimore, United States, (5)Aerodyne Research Inc., Billerica, United States, (6)Environmental Defense Fund, Houston, United States, (7)Environmental Defense Fund, New Orleans, United States, (8)Environmental Defense Fund, Austin, United States, (9)Deep South Center for Environmental Justice, New Orleans, United States

Lintong Cai¹, Sanghee Han², Minghao Han², Jonah Hazelwood³, Sarah Petters², Aaron Collins⁴, Nicholas Meskhidze³ and Markus D Petters⁵, (1)University of California Riverside, Center for Environmental Research and Technology, Riverside, CA, United States, (2)University of California Riverside, Riverside, United States, (3)North Carolina State University, Marine, Earth, and Atmospheric Sciences, Raleigh, United States, (4)OpenAeros, Saint Paul, United States, (5)University of California Riverside, Center for Environmental Research and Technology, Riverside, United States

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

Amber Allen, Brigham Young University, Provo, UT, United States and Darrell Sonntag, Brigham Young University, Provo, United States

Olga Pikelnaya¹, Yifan Yu², Catalina Tsai¹, Jack Porter², Nathaniel Brockway², William Senga², Raphael Mayorga² and Andrea Polidori², (1)South Coast Air Quality Management District, Diamond Bar, CA, United States, (2)South Coast Air Quality Management District, Diamond Bar, United States

Tara Irene Yacovitch¹, Scott C. Herndon², Yuanfeng Cui³, John D Albertson⁴, Rachel Nathan², Conner Daube², Elizabeth Lunny², John Budney² and Bruce Daube², (1)Aerodyne Research Inc., Billerica, MA, United States, (2)Aerodyne Research Inc., Billerica, United States, (3)Cornell University, Civil and Environmental Engineering, Ithaca, NY, United States, (4)Cornell University, Ithaca, NY, United States

Kirsten Steele¹, Spencer Larson², Amber Allen¹, Zachary Driskill², Sam Swindler², Jake Gates², Nathan Williams², Daniel Barry², Ethan Sorensen², Matthew Jones², Darrell Sonntag², Dale Tree² and Phil Lundrigan³, (1)Brigham Young University, Provo, UT, United States, (2)Brigham Young University, Provo, United States, (3)Brigham Young University, Department of Electrical and Computer Engineering, Provo, United States

Annette Carlson, Leah Gibson, Erik Joplin, Robert Summers, Steve Szocik, Bryttani West, Megan Richie, Anna Cochran, Timothy Weinmann, Ashley Collier-Oxandale, Clyde Sharp and Jason Schroder, Colorado Department of Public Health and Environment, Air Pollution Control Division, Denver, United States

Daniel Sung¹, Evelyn Deveraux¹, Chou-Hsien Lin¹, Benjamin Kienzle¹, Anna Neville¹, Lea El Khoury², Shihao Zhai², Kat Konon², David Jarma¹, Juan Pedro Maestre¹, Christopher Frobenius³, Jena Herbst⁴, Ben Rico³, Leila El Masri³, Justin Hamlin³, Greg Sandstorm⁴, Christopher Lee⁴, Monica Castrejón³, Beatriz Klimeck⁴, Karolina Cysneiros de Carvalho⁵, Kelley Barsanti⁵, William C Porter⁶, Siyuan Wang⁷, Kimberly A Prather^3,4, Kerry Kinney¹, Lea Hildebrandt Ruiz² and Pawel Misztal¹, (1)University of Texas at Austin, Maseeh Department of Civil, Architectural and Environmental Engineering, Austin, United States, (2)University of Texas at Austin, McKetta Department of Chemical Engineering, Austin, United States, (3)University of California San Diego, Department of Chemistry & Biochemistry, La Jolla, United States, (4)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (5)University of California Riverside, Riverside, United States, (6)University of California Riverside, Riverside, CA, United States, (7)University of Miami, Rosenstiel School of Marine and Atmospheric Science, Miami, United States

Guillaume Gronoff, Science Systems and Applications, Inc. Hampton, Hampton, VA, United States and Daniel Phoenix, NASA Langley Research Center, Hampton, United States

Vine Blankenship¹, Haroula D Baliaka¹, Ryan Xavier Ward¹, Purushottam Kumar² and Richard C Flagan³, (1)California Institute of Technology, Pasadena, CA, United States, (2)California Institute of Technology, Pasadena, United States, (3)California Inst Technology, Department of Chemical Engineering, Pasadena, CA, United States

Darvensky Eugene, SUNY at Albany, Department of Environmental Health Sciences, Albany, United States, Avery Jackson, Suny at Albany, Department of Environmental and Sustainable Engineering, Albany, United States, Zarifa Hossain, SUNY at Albany, Department of Environmental and Sustainable Engineering, Albany, United States, James Nimo, University at Albany State University of New York, Albany, United States and Md. Aynul Bari, Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, Albany, NY, United States

Daniel Peters, Elizabeth Mohr, Lauren E Padilla and Ramon Alvarez, Environmental Defense Fund, Austin, United States

Peter G Oduor¹, Syeda Batool², Syeda Sitwat Batool², Thomas DeSutter³, Miranda Meehan¹ and Syeda Sitwat Batool, (1)North Dakota State University Main Campus, Fargo, ND, United States, (2)North Dakota State University Main Campus, Fargo, United States, (3)North Dakota State University Main Campus, Soil Sciences, Fargo, United States