title: Formation of Low Volatility Organic Compounds and Secondary Organic Aerosol from Isoprene Hydroxyhydroperoxide Low-NO Oxidation.
abstract: Gas-phase low volatility organic compounds (LVOC), produced from oxidation of isoprene 4-hydroxy-3-hydroperoxide (4,3-ISOPOOH) under low-NO conditions, were observed during the FIXCIT chamber study. Decreases in LVOC directly correspond to appearance and growth in secondary organic aerosol (SOA) of consistent elemental composition, indicating that LVOC condense (at OA below 1 μg m(-3)). This represents the first simultaneous measurement of condensing low volatility species from isoprene oxidation in both the gas and particle phases. The SOA formation in this study is separate from previously described isoprene epoxydiol (IEPOX) uptake. Assigning all condensing LVOC signals to 4,3-ISOPOOH oxidation in the chamber study implies a wall-loss corrected non-IEPOX SOA mass yield of ∼4%. By contrast to monoterpene oxidation, in which extremely low volatility VOC (ELVOC) constitute the organic aerosol, in the isoprene system LVOC with saturation concentrations from 10(-2) to 10 μg m(-3) are the main constituents. These LVOC may be important for the growth of nanoparticles in environments with low OA concentrations. LVOC observed in the chamber were also observed in the atmosphere during SOAS-2013 in the Southeastern United States, with the expected diurnal cycle. This previously uncharacterized aerosol formation pathway could account for ∼5.0 Tg yr(-1) of SOA production, or 3.3% of global SOA.
authors.affiliation: Cooperative Institute for Research in Environmental Sciences (CIRES) , Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Jordan E
authors.initials: JE
authors.lastname: Krechmer
authors.affiliation: Divisions of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Matthew M
authors.initials: MM
authors.lastname: Coggon
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: Paola
authors.initials: P
authors.lastname: Massoli
authors.affiliation: Divisions of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.|Division of Geological and Planetary Sciences, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Tran B
authors.initials: TB
authors.lastname: Nguyen
authors.affiliation: Division of Geological and Planetary Sciences, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: John D
authors.initials: JD
authors.lastname: Crounse
authors.affiliation: Cooperative Institute for Research in Environmental Sciences (CIRES) , Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Hu
authors.affiliation: Cooperative Institute for Research in Environmental Sciences (CIRES) , Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Day
authors.affiliation: National Center for Atmospheric Research , Boulder, Colorado 80301, United States.
authors.forename: Geoffrey S
authors.initials: GS
authors.lastname: Tyndall
authors.affiliation: Department of Mechanical Engineering, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Daven K
authors.initials: DK
authors.lastname: Henze
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States.
authors.forename: Jean C
authors.initials: JC
authors.lastname: Rivera-Rios
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: John B
authors.initials: JB
authors.lastname: Nowak
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.|Tofwerk, AG, CH-3600, Thun, Switzerland.
authors.forename: Joel R
authors.initials: JR
authors.lastname: Kimmel
authors.affiliation: Department of Atmospheric and Oceanic Sciences, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Roy L
authors.initials: RL
authors.lastname: Mauldin
authors.affiliation: Cooperative Institute for Research in Environmental Sciences (CIRES) , Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.|Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: Harald
authors.initials: H
authors.lastname: Stark
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: John T
authors.initials: JT
authors.lastname: Jayne
authors.affiliation: Department of Physics, University of Helsinki , 00014, Helsinki, Finland.
authors.forename: Mikko
authors.initials: M
authors.lastname: Sipilä
authors.affiliation: Department of Physics, University of Helsinki , 00014, Helsinki, Finland.
authors.forename: Heikki
authors.initials: H
authors.lastname: Junninen
authors.affiliation: Division of Geological and Planetary Sciences, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Jason M St
authors.initials: JM
authors.lastname: Clair
authors.affiliation: Divisions of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Meteorology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Philip A
authors.initials: PA
authors.lastname: Feiner
authors.affiliation: Department of Meteorology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Meteorology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: David O
authors.initials: DO
authors.lastname: Miller
authors.affiliation: Department of Meteorology, Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: William H
authors.initials: WH
authors.lastname: Brune
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States.
authors.forename: Frank N
authors.initials: FN
authors.lastname: Keutsch
authors.affiliation: Division of Geological and Planetary Sciences, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: Paul O
authors.initials: PO
authors.lastname: Wennberg
authors.affiliation: Divisions of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States.|Division of Engineering and Applied Science, California Institute of Technology , Pasadena, California 91125, United States.
authors.forename: John H
authors.initials: JH
authors.lastname: Seinfeld
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: Douglas R
authors.initials: DR
authors.lastname: Worsnop
authors.affiliation: Cooperative Institute for Research in Environmental Sciences (CIRES) , Boulder, Colorado 80309, United States.|Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States.
authors.forename: Jose L
authors.initials: JL
authors.lastname: Jimenez
authors.affiliation: Center for Aerosol and Cloud Chemistry, Aerodyne Research , Billerica, Massachusetts 01821, United States.
authors.forename: Manjula R
authors.initials: MR
authors.lastname: Canagaratna
mesh_terms: D000336:Aerosols / Q000032:analysis*; D001272:Atmosphere / Q000737:chemistry; D002070:Butadienes / Q000032:analysis*; D045782:Hemiterpenes / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000032:analysis*; D008962:Models, Theoretical; D009569:Nitric Oxide / Q000737:chemistry; D009930:Organic Chemicals / Q000032:analysis*; D010084:Oxidation-Reduction; D010420:Pentanes / Q000032:analysis*; D015144:Southeastern United States; D013997:Time Factors; D055548:Vapor Pressure; D055549:Volatile Organic Compounds / Q000032:analysis*; D014835:Volatilization
chemical_list: D000336:Aerosols; D002070:Butadienes; D045782:Hemiterpenes; D009930:Organic Chemicals; D010420:Pentanes; D055549:Volatile Organic Compounds; C005059:isoprene; D009569:Nitric Oxide; D006861:Hydrogen Peroxide