Elemental carbon observed at a peri-urban forest site near the seoul metropolitan area as a tracer of seasonal haze occurrence

Jeeyoung Ham; Inseon Suh; Meehye Lee; Hyunseok Kim; Soyoung Kim

doi:10.3390/atmos12121627

Elemental carbon observed at a peri-urban forest site near the seoul metropolitan area as a tracer of seasonal haze occurrence

Jeeyoung Ham, Inseon Suh, Meehye Lee, Hyunseok Kim, Soyoung Kim

Department of Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In order to identify the seasonal variability and source of carbonaceous aerosols in relation to haze occurrence, organic carbon (OC) and elemental carbon (EC) were continuously measured at the Taehwa Research Forest (TRF) near the Seoul metropolitan area from May 2013 to April 2014. For the entire experiment, the mean OC (5.1 µgC/m³) and EC (1.7 µgC/m³) concentrations of TRF were comparable to those of Seoul, with noticeably higher concentrations in winter and spring than in other seasons, and during haze days (6.6 ± 3.2 and 2.1 ± 1.0 µgC/m³) than during non-haze days (3.5 ± 2.2 and 1.3 ± 0.8 µgC/m³). The seasonal characteristics of OC and EC reveal the various sources of haze, including biomass combustion haze either transported for long distances or, in spring, from domestic regions, the greatest contribution of secondary organic carbon (SOC) in summer, and fossil fuel combustion in winter and fall. In addition, the seasonal OC/EC ratios between haze and non-haze days highlights that the increase in EC was more distinct than that of OC during haze episodes, thus suggesting that EC observed at a peri-urban forest site serves as a useful indicator for seasonally varying source types of haze aerosols in the study region.

Original language	English
Article number	1627
Journal	Atmosphere
Volume	12
Issue number	12
DOIs	https://doi.org/10.3390/atmos12121627
Publication status	Published - 2021 Dec

Bibliographical note

Funding Information:
This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements.

Funding Information:
Funding: This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

EC
OC
OC/EC ratio
Peri-urban forest site
Seasonal haze
Taehwa Research Forest

ASJC Scopus subject areas

Environmental Science (miscellaneous)
Atmospheric Science

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10.3390/atmos12121627

Cite this

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title = "Elemental carbon observed at a peri-urban forest site near the seoul metropolitan area as a tracer of seasonal haze occurrence",

abstract = "In order to identify the seasonal variability and source of carbonaceous aerosols in relation to haze occurrence, organic carbon (OC) and elemental carbon (EC) were continuously measured at the Taehwa Research Forest (TRF) near the Seoul metropolitan area from May 2013 to April 2014. For the entire experiment, the mean OC (5.1 µgC/m3) and EC (1.7 µgC/m3) concentrations of TRF were comparable to those of Seoul, with noticeably higher concentrations in winter and spring than in other seasons, and during haze days (6.6 ± 3.2 and 2.1 ± 1.0 µgC/m3) than during non-haze days (3.5 ± 2.2 and 1.3 ± 0.8 µgC/m3). The seasonal characteristics of OC and EC reveal the various sources of haze, including biomass combustion haze either transported for long distances or, in spring, from domestic regions, the greatest contribution of secondary organic carbon (SOC) in summer, and fossil fuel combustion in winter and fall. In addition, the seasonal OC/EC ratios between haze and non-haze days highlights that the increase in EC was more distinct than that of OC during haze episodes, thus suggesting that EC observed at a peri-urban forest site serves as a useful indicator for seasonally varying source types of haze aerosols in the study region.",

keywords = "EC, OC, OC/EC ratio, Peri-urban forest site, Seasonal haze, Taehwa Research Forest",

author = "Jeeyoung Ham and Inseon Suh and Meehye Lee and Hyunseok Kim and Soyoung Kim",

note = "Funding Information: This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements. Funding Information: Funding: This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/atmos12121627",

language = "English",

volume = "12",

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AU - Ham, Jeeyoung

AU - Suh, Inseon

AU - Lee, Meehye

AU - Kim, Hyunseok

AU - Kim, Soyoung

N1 - Funding Information: This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements. Funding Information: Funding: This study was supported by the Korea Institute of Science and Technology (KIST) through grant 2E31290-21-P009. A special thank is given to the Institute of Environmental Research (NIER) for providing the research facilities and supporting the measurements. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/12

Y1 - 2021/12

N2 - In order to identify the seasonal variability and source of carbonaceous aerosols in relation to haze occurrence, organic carbon (OC) and elemental carbon (EC) were continuously measured at the Taehwa Research Forest (TRF) near the Seoul metropolitan area from May 2013 to April 2014. For the entire experiment, the mean OC (5.1 µgC/m3) and EC (1.7 µgC/m3) concentrations of TRF were comparable to those of Seoul, with noticeably higher concentrations in winter and spring than in other seasons, and during haze days (6.6 ± 3.2 and 2.1 ± 1.0 µgC/m3) than during non-haze days (3.5 ± 2.2 and 1.3 ± 0.8 µgC/m3). The seasonal characteristics of OC and EC reveal the various sources of haze, including biomass combustion haze either transported for long distances or, in spring, from domestic regions, the greatest contribution of secondary organic carbon (SOC) in summer, and fossil fuel combustion in winter and fall. In addition, the seasonal OC/EC ratios between haze and non-haze days highlights that the increase in EC was more distinct than that of OC during haze episodes, thus suggesting that EC observed at a peri-urban forest site serves as a useful indicator for seasonally varying source types of haze aerosols in the study region.

AB - In order to identify the seasonal variability and source of carbonaceous aerosols in relation to haze occurrence, organic carbon (OC) and elemental carbon (EC) were continuously measured at the Taehwa Research Forest (TRF) near the Seoul metropolitan area from May 2013 to April 2014. For the entire experiment, the mean OC (5.1 µgC/m3) and EC (1.7 µgC/m3) concentrations of TRF were comparable to those of Seoul, with noticeably higher concentrations in winter and spring than in other seasons, and during haze days (6.6 ± 3.2 and 2.1 ± 1.0 µgC/m3) than during non-haze days (3.5 ± 2.2 and 1.3 ± 0.8 µgC/m3). The seasonal characteristics of OC and EC reveal the various sources of haze, including biomass combustion haze either transported for long distances or, in spring, from domestic regions, the greatest contribution of secondary organic carbon (SOC) in summer, and fossil fuel combustion in winter and fall. In addition, the seasonal OC/EC ratios between haze and non-haze days highlights that the increase in EC was more distinct than that of OC during haze episodes, thus suggesting that EC observed at a peri-urban forest site serves as a useful indicator for seasonally varying source types of haze aerosols in the study region.

KW - EC

KW - OC

KW - OC/EC ratio

KW - Peri-urban forest site

KW - Seasonal haze

KW - Taehwa Research Forest

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U2 - 10.3390/atmos12121627

DO - 10.3390/atmos12121627

M3 - Article

AN - SCOPUS:85121789410

SN - 2073-4433

VL - 12

JO - Atmosphere

JF - Atmosphere

IS - 12

M1 - 1627

ER -

Elemental carbon observed at a peri-urban forest site near the seoul metropolitan area as a tracer of seasonal haze occurrence

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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