Real-time characterization of isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) in Eastern China - Archive ouverte HAL Access content directly
Conference Papers Year : 2016

Real-time characterization of isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) in Eastern China

(1) , , , (1) , , , , , , (1) , , , ,
1
Lili Tang
  • Function : Author
Yele Sun
  • Function : Author
Francesco Canonaco
  • Function : Author
Dantong Liu
  • Function : Author
John Jayne
  • Function : Author
Zhuang Wang
  • Function : Author
Philip Croteau
  • Function : Author
Manjula Canagaratna
  • Function : Author
Hongcang Zhou
  • Function : Author
André Prevot
  • Function : Author
Douglas Worsnop
  • Function : Author

Abstract

Isoprene (2-methyl-1,3-butadiene, C5H8), from biogenic emissions, is a significant source of global non-methane hydrocarbon in the atmosphere. Its oxidation products (isoprene epoxydiols, IEPOX) can form secondary organic aerosol (SOA) and exert potential impacts on air quality and regional climate. Although a few studies have reported the isoprene-related organic aerosol in China's atmosphere via filter-based measurements, real-time characterization of IEPOX-derived SOA (IEPOX-SOA) has never been performed to date. Here we report the identification and quantification of IEPOXSOA based on Aerosol Chemical Speciation Monitor (ACSM) measurements in Eastern China in summer 2013 along with multilinear engine (ME-2) analysis of OA spectra. The average mass concentration of IEPOX-SOA is 0.33±0.19μg/m3 for the entire study period, which accounts for 3.8% of total OA. IEPOX-SOA presents a strong diurnal cycle with a clear daytime increase related to photochemical production. The IEPOX-SOA correlated well with sulfate (r = 0.61), suggesting that anthropogenic SO2 emissions might affect the IEPOXSOA formation in urban Nanjing. Potential source contribution function analysis shows that high IEPOX-SOA is primarily from the south of Nanjing with substantially large biogenic emissions. Our results suggest that the interactions between anthropogenic SO2 and biogenic VOCs from regional transport might have played a key role in the formation of IEPOX-SOA in Eastern China.
Not file

Dates and versions

ineris-01854711 , version 1 (07-08-2018)

Identifiers

  • HAL Id : ineris-01854711 , version 1

Cite

Yunjiang Zhang, Lili Tang, Yele Sun, Olivier Favez, Francesco Canonaco, et al.. Real-time characterization of isoprene epoxydiols-derived secondary organic aerosol (IEPOX-SOA) in Eastern China. 35. AAAR annual conference, Oct 2016, Portland, United States. ⟨ineris-01854711⟩

Collections

INERIS
53 View
0 Download

Share

Gmail Facebook Twitter LinkedIn More