2026-10-15T07:53:20Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34509168 2026-10-14T16:22:44Z category_146 category_272 category_873 category_734 category_69 portal_63 item_type_3 month_year_10_2026

Toward Recreating the Breath of Cities in the Atmospheric Simulation Chamber SAPHIR Yizhen Wu (312350) Ralf Tillmann (2106886) Eva Y. Pfannerstill (8541843) Peeyush Khare (7596713) Andrea Carolina Marcillo Lara (25818447) Achim Grasse (25818450) Franz Rohrer (2106853) Milan Roska (22430144) Clémence Depp (25818453) Max Gerrit Adam (11387567) Sarah Albertin (17201502) Rabbia Asgher (18880055) Thomas J. Bannan (3841630) Shawon Barua (18592003) Kelvin H. Bates (1541215) David M. Bell (1575094) Birger Bohn (2106883) Steven Brown (637397) Angela Buchholz (843449) Yanfang Chen (297755) Changmin Cho (14026059) Hugh Coe (2011966) Matthew M. Coggon (1515025) Michelle Färber (19321745) Sana Farhoudian (18880058) Juliane L. Fry (1340076) Hendrik Fuchs (1891519) Martin Graus (2034394) Imad El Haddad (7473746) Quanfu He (1733179) Thorsten Hohaus (526433) Siddharth Iyer (1391008) Vlassis A. Karydis (11773346) Avinash Kumar (368828) Markus Leiminger (1712278) Lu Liu (171341) Emily Matthews (11408016) Gordon McFiggans (1965904) Ann M. Middlebrook (2101762) Markus Müller (1364835) Aki Nissinen (25818456) Anke C. Nölscher (22960063) Anna Novelli (7307981) Farhan R. Nursanto (25818459) Sebastien Perrier (1372026) André S. H. Prévôt (11330784) Iida Pullinen (7311206) Eka Dian Pusfitasari (25818462) Tobias Reinecke (6169301) Matti Rissanen (2615977) Matthieu Riva (1606852) Michael A. Robinson (684573) Siegfried Schobesberger (1712272) Chelsea E. Stockwell (9192616) Jens Top (16920845) Alexandra P. Tsimpidi (11773349) Netta Vinkvist (19137064) Aristeidis Voliotis (16563090) Andreas Wahner (7307984) Yuantao Wang (774884) Yuwei Wang (178411) Carsten Warneke (3744747) Robert Wegener (25818465) Boxing Yang (18523317) Georgios I. Gkatzelis (7307975) Space Science Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Biological Sciences not elsewhere classified Inorganic Chemistry studying oxidation processes product ions observed phase mixtures representative oxidation product diversity hydroperoxy radical ratios capture key aspects volatile chemical products major urban sources dominated traffic ), constructing emission fingerprints saphir outdoor chamber urban atmospheric observations levels favored ro 2 </ sub urban air field observations emission scenario dominated city chemical complexity chamber experiments toward recreating representing 78 precursor systems los angeles linear correlation lifetimes comparable including vegetation future low data sets cooking emissions chanel campaign ambient air although lower aircraft measurements Atmospheric simulation chambers are essential for studying oxidation processes, yet many experiments rely on single-precursor systems at concentrations that limit their representativeness for the chemical complexity of urban air. Here, we present a framework linking emission inventories, chamber experiments, and field observations by constructing emission fingerprints of major urban sources, including vegetation, volatile chemical products, cooking emissions, and gasoline and diesel exhaust. Applied during the CHANEL campaign in the SAPHIR outdoor chamber, these fingerprints advanced toward reproducing gas-phase mixtures representative of Los Angeles (gasoline-dominated traffic), a diesel-dominated city, and a future low-vehicle-emission scenario. The resulting mixtures generated peroxy-to-hydroperoxy radical ratios (RO2/HO2) close to unity, bimolecular RO2 lifetimes comparable with urban atmospheric observations, although lower NO levels favored RO2 + HO2 over RO2 + NO reactions. Comparison with aircraft measurements over Los Angeles using ammonium (NH4+) chemical ionization mass spectrometry showed reasonable agreement, with 465 organic product ions detected in both data sets, representing 78% of the product ions observed in the ambient air. Furthermore, 87% of common product ions agreed within a factor of 3 of the linear correlation, demonstrating that chamber experiments can capture key aspects of both atmospherically relevant radical chemistry and the oxidation product diversity of urban air. 2026-10-14T00:00:00Z Dataset Dataset 10.1021/acs.est.6c05767.s002 https://figshare.com/articles/dataset/Toward_Recreating_the_Breath_of_Cities_in_the_Atmospheric_Simulation_Chamber_SAPHIR/34509168 CC BY-NC 4.0