Variation of OC and EC in PM&lt;sub&gt;2.5&lt;/sub&gt; at Mt. Taehwa

Ham, J. van; Lee, Meehye; Park, Hyun-Ju; Cho, Gangnam; Park, Jungmin

doi:10.5572/kosae.2016.32.1.021

Cited by 4 publications

(4 citation statements)

References 41 publications

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“…In the previous study, vehicle emissions from nearby roads have been identified as main sources for EC at TRF (Ham et al, 2016). In contrast, OC was dominated by contemporary sources with Fc (OC) of 897% (n=2), albeit the small number of samples (n=2).…”

Section: Fm For Ec and Ocmentioning

confidence: 92%

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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

Lee

Czimczik

et al. 2019

Science of The Total Environment

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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 g m-3 , 2.6  0.8 gC m-3 , and 1.41.4 gN m-3 , respectively. The  13 C of TC and the  15 N 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  15 N of NH4 +. The low  15 N (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  15 N (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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Section: Fm For Ec and Ocmentioning

confidence: 92%

“…In summer, the average NOx was low at TRF (Ham et al, 2016) as well as China (Wang et al, 2007). In contrast, NH3 levels were the highest across China (Pan et al, 2018).…”

Section:  15 N For Tnmentioning

confidence: 95%

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

Lee

Czimczik

et al. 2019

Science of The Total Environment

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“…대기 중의 초미세먼지는 직접적으로 흡수 또는 산란 을 통해 시정에 영향을 주며 가시도를 저하시키고 구 름 응결핵으로 작용하면서 기후변화를 초래한다 (Gao et al, 2015;Rastogi et al, 2014;Tao et al, 2014 (Tang et al, 2017;Chen et al, 2016). 국내에서는 초미세먼지를 규제하기 위해 2015 년에 대기환경기준 (PM 2.5 50 μg/m 3 )을 도입하였으며 2018년 현재 초미세먼지 규제 기준은 35 μg/m 3 으로 강 화되었다 (Park et al, 2017;Ham et al, 2016 (Nowak et al, 2013;Kim et al, 2012;Lee et al, 2008). (Pathak et al, 2009).…”

Section: 서 론unclassified

“…The diagram of (a) PILS-TOC and (b) PILS-IC at Bukhansan National Park (adapted fromPark et al, 2016).…”

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confidence: 99%

Characterization of Aerosol Composition, Concentration, and Sources in Bukhansan National Park, Korea

Kang¹,

강태원²,

taehyunpark³

et al. 2018

KOSAE

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Elemental Carbon Observed at a Peri-Urban Forest Site near the Seoul Metropolitan Area as a Tracer of Seasonal Haze Occurrence

et al. 2021

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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.

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Variation of OC and EC in PM<sub>2.5</sub> at Mt. Taehwa

Cited by 4 publications

References 41 publications

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

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

Characterization of Aerosol Composition, Concentration, and Sources in Bukhansan National Park, Korea

Elemental Carbon Observed at a Peri-Urban Forest Site near the Seoul Metropolitan Area as a Tracer of Seasonal Haze Occurrence

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