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Limited formation of isoprene epoxydiols‐derived secondary organic aerosol under NO x ‐rich environments in Eastern China
Author(s) -
Zhang Yunjiang,
Tang Lili,
Sun Yele,
Favez Olivier,
Caaco Francesco,
Albinet Alexandre,
Couvidat Florian,
Liu Dantong,
Jayne John T.,
Wang Zhuang,
Croteau Philip L.,
Canagaratna Manjula R.,
Zhou Hongcang,
Prévôt André S. H.,
Worsnop Douglas R.
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2016gl072368
Subject(s) - isoprene , methacrolein , environmental chemistry , methyl vinyl ketone , aerosol , environmental science , chemistry , organic chemistry , catalysis , monomer , copolymer , methacrylic acid , polymer
Secondary organic aerosol (SOA) derived from isoprene epoxydiols (IEPOX) has potential impacts on regional air quality and climate yet is poorly characterized under NO x ‐rich ambient environments. We report the first real‐time characterization of IEPOX‐derived SOA (IEPOX‐SOA) in Eastern China in summer 2013 using comprehensive ambient measurements, along with model analysis. The ratio of IEPOX‐SOA to isoprene high‐NO x SOA precursors, e.g., methyl vinyl ketone and methacrolein, and the reactive uptake potential of IEPOX was lower than those generally observed in regions with prevailing biogenic emissions, low NO x levels, and high particle acidity, elucidating the suppression of IEPOX‐SOA formation under NO x ‐rich environments. IEPOX‐SOA showed high potential source regions to the south with large biogenic emissions, illustrating that the interactions between biogenic and anthropogenic emissions might have played an important role in affecting the formation of IEPOX‐SOA in polluted environments in Eastern China.