title: Organosulfates as tracers for secondary organic aerosol (SOA) formation from 2-methyl-3-buten-2-ol (MBO) in the atmosphere.
abstract: 2-Methyl-3-buten-2-ol (MBO) is an important biogenic volatile organic compound (BVOC) emitted by pine trees and a potential precursor of atmospheric secondary organic aerosol (SOA) in forested regions. In the present study, hydroxyl radical (OH)-initiated oxidation of MBO was examined in smog chambers under varied initial nitric oxide (NO) and aerosol acidity levels. Results indicate measurable SOA from MBO under low-NO conditions. Moreover, increasing aerosol acidity was found to enhance MBO SOA. Chemical characterization of laboratory-generated MBO SOA reveals that an organosulfate species (C(5)H(12)O(6)S, MW 200) formed and was substantially enhanced with elevated aerosol acidity. Ambient fine aerosol (PM(2.5)) samples collected from the BEARPEX campaign during 2007 and 2009, as well as from the BEACHON-RoMBAS campaign during 2011, were also analyzed. The MBO-derived organosulfate characterized from laboratory-generated aerosol was observed in PM(2.5) collected from these campaigns, demonstrating that it is a molecular tracer for MBO-initiated SOA in the atmosphere. Furthermore, mass concentrations of the MBO-derived organosulfate are well correlated with MBO mixing ratio, temperature, and acidity in the field campaigns. Importantly, this compound accounted for an average of 0.25% and as high as 1% of the total organic aerosol mass during BEARPEX 2009. An epoxide intermediate generated under low-NO conditions is tentatively proposed to produce MBO SOA.
authors: Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States.
authors: Haofei
authors: H
authors: Zhang
authors: David R
authors: DR
authors: Worton
authors: Michael
authors: M
authors: Lewandowski
authors: John
authors: J
authors: Ortega
authors: Caitlin L
authors: CL
authors: Rubitschun
authors: Jeong-Hoo
authors: JH
authors: Park
authors: Kasper
authors: K
authors: Kristensen
authors: Pedro
authors: P
authors: Campuzano-Jost
authors: Douglas A
authors: DA
authors: Day
authors: Jose L
authors: JL
authors: Jimenez
authors: Mohammed
authors: M
authors: Jaoui
authors: John H
authors: JH
authors: Offenberg
authors: Tadeusz E
authors: TE
authors: Kleindienst
authors: Jessica
authors: J
authors: Gilman
authors: William C
authors: WC
authors: Kuster
authors: Joost
authors: J
authors: de Gouw
authors: Changhyoun
authors: C
authors: Park
authors: Gunnar W
authors: GW
authors: Schade
authors: Amanda A
authors: AA
authors: Frossard
authors: Lynn
authors: L
authors: Russell
authors: Lisa
authors: L
authors: Kaser
authors: Werner
authors: W
authors: Jud
authors: Armin
authors: A
authors: Hansel
authors: Luca
authors: L
authors: Cappellin
authors: Thomas
authors: T
authors: Karl
authors: Marianne
authors: M
authors: Glasius
authors: Alex
authors: A
authors: Guenther
authors: Allen H
authors: AH
authors: Goldstein
authors: John H
authors: JH
authors: Seinfeld
authors: Avram
authors: A
authors: Gold
authors: Richard M
authors: RM
authors: Kamens
authors: Jason D
authors: JD
authors: Surratt
mesh_terms: D000336:Aerosols / Q000737:chemistry*; D000393:Air Pollutants / Q000737:chemistry*; D001272:Atmosphere / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D009569:Nitric Oxide / Q000737:chemistry; D010083:Oxidants, Photochemical / Q000737:chemistry; D010084:Oxidation-Reduction; D000439:Pentanols / Q000737:chemistry*; D028223:Pinus / Q000737:chemistry; D013463:Sulfuric Acid Esters / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D010083:Oxidants, Photochemical; D000439:Pentanols; D013463:Sulfuric Acid Esters; D055549:Volatile Organic Compounds; D009569:Nitric Oxide; D017665:Hydroxyl Radical; C027250:3-hydroxy-3-methylbutene