title: Ambient Gas-Particle Partitioning of Tracers for Biogenic Oxidation.
abstract: Exchange of atmospheric organic compounds between gas and particle phases is important in the production and chemistry of particle-phase mass but is poorly understood due to a lack of simultaneous measurements in both phases of individual compounds. Measurements of particle- and gas-phase organic compounds are reported here for the southeastern United States and central Amazonia. Polyols formed from isoprene oxidation contribute 8% and 15% on average to particle-phase organic mass at these sites but are also observed to have substantial gas-phase concentrations contrary to many models that treat these compounds as nonvolatile. The results of the present study show that the gas-particle partitioning of approximately 100 known and newly observed oxidation products is not well explained by environmental factors (e.g., temperature). Compounds having high vapor pressures have higher particle fractions than expected from absorptive equilibrium partitioning models. These observations support the conclusion that many commonly measured biogenic oxidation products may be bound in low-volatility mass (e.g., accretion products, inorganic-organic adducts) that decomposes to individual compounds on analysis. However, the nature and extent of any such bonding remains uncertain. Similar conclusions are reach for both study locations, and average particle fractions for a given compound are consistent within ∼25% across measurement sites.
authors.affiliation: Department. of Environmental Science, Policy, and Management, University of California , Berkeley, California 94720, United States.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Isaacman-VanWertz
authors.affiliation: Department. of Environmental Science, Policy, and Management, University of California , Berkeley, California 94720, United States.
authors.forename: Lindsay D
authors.initials: LD
authors.lastname: Yee
authors.affiliation: Aerosol Dynamics Inc. , Berkeley, California 94710, United States.
authors.forename: Nathan M
authors.initials: NM
authors.lastname: Kreisberg
authors.affiliation: Department of Civil and Environmental Engineering, University of California , Berkeley, California 94720, United States.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Wernis
authors.affiliation: Department. of Environmental Science, Policy, and Management, University of California , Berkeley, California 94720, United States.
authors.forename: Joshua A
authors.initials: JA
authors.lastname: Moss
authors.affiliation: Aerosol Dynamics Inc. , Berkeley, California 94710, United States.
authors.forename: Susanne V
authors.initials: SV
authors.lastname: Hering
authors.affiliation: School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 01451, United States.
authors.forename: Suzane S
authors.initials: SS
authors.lastname: de Sá
authors.affiliation: School of Engineering and Applied Sciences, Harvard University , Cambridge, Massachusetts 01451, United States.|Department of Earth and Planetary Sciences, Harvard University , Cambridge, Massachusetts 01451, United States.
authors.forename: Scot T
authors.initials: ST
authors.lastname: Martin
authors.affiliation: Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory , Richland, Washington 99352, United States.
authors.forename: M Lizabeth
authors.initials: ML
authors.lastname: Alexander
authors.affiliation: Department of Chemistry & Biochemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Brett B
authors.initials: BB
authors.lastname: Palm
authors.affiliation: Department of Chemistry & Biochemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Hu
authors.affiliation: Department of Chemistry & Biochemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Pedro
authors.initials: P
authors.lastname: Campuzano-Jost
authors.affiliation: Department of Chemistry & Biochemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Day
authors.affiliation: Department of Chemistry & Biochemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Jose L
authors.initials: JL
authors.lastname: Jimenez
authors.affiliation: Department of Environmental Sciences and Engineering, University of North Carolina , Chapel Hill, North Carolina 27599, United States.
authors.forename: Matthieu
authors.initials: M
authors.lastname: Riva
authors.affiliation: Department of Environmental Sciences and Engineering, University of North Carolina , Chapel Hill, North Carolina 27599, United States.
authors.forename: Jason D
authors.initials: JD
authors.lastname: Surratt
authors.affiliation: Instituto Nacional de Pesquisas da Amazonia , Manaus, Amazonas, Brazil , 69060-001.
authors.forename: Juarez
authors.initials: J
authors.lastname: Viegas
authors.affiliation: Instituto Nacional de Pesquisas da Amazonia , Manaus, Amazonas, Brazil , 69060-001.
authors.forename: Antonio
authors.initials: A
authors.lastname: Manzi
authors.affiliation: Atmospheric Research & Analysis, Inc. , Cary, North Carolina 27513, United States.
authors.forename: Eric
authors.initials: E
authors.lastname: Edgerton
authors.affiliation: Atmospheric Research & Analysis, Inc. , Cary, North Carolina 27513, United States.
authors.forename: Karsten
authors.initials: K
authors.lastname: Baumann
authors.affiliation: Universidade do Estado do Amazonas , Manaus, Amazonas, Brazil , 69735-000.
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Souza
authors.affiliation: Universidade de São Paulo , São Paulo, Brazil , 05508-020.
authors.forename: Paulo
authors.initials: P
authors.lastname: Artaxo
authors.affiliation: Department. of Environmental Science, Policy, and Management, University of California , Berkeley, California 94720, United States.|Department of Civil and Environmental Engineering, University of California , Berkeley, California 94720, United States.
authors.forename: Allen H
authors.initials: AH
authors.lastname: Goldstein
mesh_terms: D000336:Aerosols; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D055548:Vapor Pressure; D014835:Volatilization
chemical_list: D000336:Aerosols; D009930:Organic Chemicals