Source signatures from combined isotopic analyses of PM2.5 carbonaceous and nitrogen aerosols at the peri-urban Taehwa Research Forest, South Korea in summer and fall

Saehee Lim, Meehye Lee, Claudia I. Czimczik, Taekyu Joo, Sandra Holden, Gergana Mouteva, Guaciara M. Santos, Xiaomei Xu, Jennifer Walker, Saewung Kim, Hyun Seok Kim, Soyoung Kim, Sanguk Lee

Research output: Contribution to journalArticle

Abstract

Isotopes are essential tools to apportion major sources of aerosols. We measured the radiocarbon, stable carbon, and stable nitrogen isotopic composition of PM2.5 at Taehwa Research Forest (TRF) near Seoul Metropolitan Area (SMA) during August–October 2014. PM2.5, TC, and TN concentrations were 19.4 ± 10.1 μg m−3, 2.6 ± 0.8 μg C m−3, and 1.4 ± 1.4 μg N m−3, respectively. The δ13C of TC and the δ15N of TN were − 25.4 ± 0.7‰ and 14.6 ± 3.8‰, respectively. EC was dominated by fossil-fuel sources with Fff (EC) of 78 ± 7%. In contrast, contemporary sources were dominant for TC with Fc (TC) of 76 ± 7%, revealing the significant contribution of contemporary sources to OC during the growing season. The isotopic signature carries more detailed information on sources depending on air mass trajectories. The urban influence was dominant under stagnant condition, which was in reasonable agreement with the estimated δ15N of NH4 +. The low δ15N (7.0 ± 0.2‰) with high TN concentration was apparent in air masses from Shandong province, indicating fossil fuel combustion as major emission source. In contrast, the high δ15N (16.1 ± 3.2‰) with enhanced TC/TN ratio reveals the impact of biomass burning in the air transported from the far eastern border region of China and Russia. Our findings highlight that the multi-isotopic composition is a useful tool to identify emission sources and to trace regional sources of carbonaceous and nitrogen aerosols.

Original languageEnglish
Pages (from-to)1505-1514
Number of pages10
JournalScience of the Total Environment
Volume655
DOIs
Publication statusPublished - 2019 Mar 10

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Aerosols
air mass
fossil fuel
isotopic composition
Nitrogen
aerosol
Fossil fuels
border region
nitrogen
summer
biomass burning
Air
metropolitan area
growing season
combustion
trajectory
isotope
Chemical analysis
Isotopes
carbon

Keywords

  • C
  • C
  • N
  • Stable isotope
  • Taehwa Research Forest

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Source signatures from combined isotopic analyses of PM2.5 carbonaceous and nitrogen aerosols at the peri-urban Taehwa Research Forest, South Korea in summer and fall. / Lim, Saehee; Lee, Meehye; Czimczik, Claudia I.; Joo, Taekyu; Holden, Sandra; Mouteva, Gergana; Santos, Guaciara M.; Xu, Xiaomei; Walker, Jennifer; Kim, Saewung; Kim, Hyun Seok; Kim, Soyoung; Lee, Sanguk.

In: Science of the Total Environment, Vol. 655, 10.03.2019, p. 1505-1514.

Research output: Contribution to journalArticle

Lim, Saehee ; Lee, Meehye ; Czimczik, Claudia I. ; Joo, Taekyu ; Holden, Sandra ; Mouteva, Gergana ; Santos, Guaciara M. ; Xu, Xiaomei ; Walker, Jennifer ; Kim, Saewung ; Kim, Hyun Seok ; Kim, Soyoung ; Lee, Sanguk. / Source signatures from combined isotopic analyses of PM2.5 carbonaceous and nitrogen aerosols at the peri-urban Taehwa Research Forest, South Korea in summer and fall. In: Science of the Total Environment. 2019 ; Vol. 655. pp. 1505-1514.
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abstract = "Isotopes are essential tools to apportion major sources of aerosols. We measured the radiocarbon, stable carbon, and stable nitrogen isotopic composition of PM2.5 at Taehwa Research Forest (TRF) near Seoul Metropolitan Area (SMA) during August–October 2014. PM2.5, TC, and TN concentrations were 19.4 ± 10.1 μg m−3, 2.6 ± 0.8 μg C m−3, and 1.4 ± 1.4 μg N m−3, respectively. The δ13C of TC and the δ15N of TN were − 25.4 ± 0.7‰ and 14.6 ± 3.8‰, respectively. EC was dominated by fossil-fuel sources with Fff (EC) of 78 ± 7{\%}. In contrast, contemporary sources were dominant for TC with Fc (TC) of 76 ± 7{\%}, revealing the significant contribution of contemporary sources to OC during the growing season. The isotopic signature carries more detailed information on sources depending on air mass trajectories. The urban influence was dominant under stagnant condition, which was in reasonable agreement with the estimated δ15N of NH4 +. The low δ15N (7.0 ± 0.2‰) with high TN concentration was apparent in air masses from Shandong province, indicating fossil fuel combustion as major emission source. In contrast, the high δ15N (16.1 ± 3.2‰) with enhanced TC/TN ratio reveals the impact of biomass burning in the air transported from the far eastern border region of China and Russia. Our findings highlight that the multi-isotopic composition is a useful tool to identify emission sources and to trace regional sources of carbonaceous and nitrogen aerosols.",
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AU - Lee, Meehye

AU - Czimczik, Claudia I.

AU - Joo, Taekyu

AU - Holden, Sandra

AU - Mouteva, Gergana

AU - Santos, Guaciara M.

AU - Xu, Xiaomei

AU - Walker, Jennifer

AU - Kim, Saewung

AU - Kim, Hyun Seok

AU - Kim, Soyoung

AU - Lee, Sanguk

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AB - Isotopes are essential tools to apportion major sources of aerosols. We measured the radiocarbon, stable carbon, and stable nitrogen isotopic composition of PM2.5 at Taehwa Research Forest (TRF) near Seoul Metropolitan Area (SMA) during August–October 2014. PM2.5, TC, and TN concentrations were 19.4 ± 10.1 μg m−3, 2.6 ± 0.8 μg C m−3, and 1.4 ± 1.4 μg N m−3, respectively. The δ13C of TC and the δ15N of TN were − 25.4 ± 0.7‰ and 14.6 ± 3.8‰, respectively. EC was dominated by fossil-fuel sources with Fff (EC) of 78 ± 7%. In contrast, contemporary sources were dominant for TC with Fc (TC) of 76 ± 7%, revealing the significant contribution of contemporary sources to OC during the growing season. The isotopic signature carries more detailed information on sources depending on air mass trajectories. The urban influence was dominant under stagnant condition, which was in reasonable agreement with the estimated δ15N of NH4 +. The low δ15N (7.0 ± 0.2‰) with high TN concentration was apparent in air masses from Shandong province, indicating fossil fuel combustion as major emission source. In contrast, the high δ15N (16.1 ± 3.2‰) with enhanced TC/TN ratio reveals the impact of biomass burning in the air transported from the far eastern border region of China and Russia. Our findings highlight that the multi-isotopic composition is a useful tool to identify emission sources and to trace regional sources of carbonaceous and nitrogen aerosols.

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