Characterization of aerosol composition, concentrations, and sources at Baengnyeong Island, Korea using an aerosol mass spectrometer

Lee, Taehyoung; Choi, Jinsoo; Lee, Gangwoong; Ahn, JaeKyoung; Park, Jin-Soo; Atwood, Samuel A.; Schurman, M. I.; Choi, Yongjoo; Chung, Yoomi; Collett, Jeffrey L.

doi:10.1016/j.atmosenv.2015.08.038

Cited by 59 publications

(21 citation statements)

References 47 publications

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“…On board were high‐resolution time‐of‐flight aerosol mass spectrometer (HR‐ToF‐AMS) and an ultra‐high sensitivity aerosol spectrometer for detecting organics, sulfate, nitrates, and ammonium (Lee et al, ). Hereafter, HR‐ToF‐AMS was refer to as AMS in this study.…”

Section: Methodsmentioning

confidence: 99%

“…All these make it difficult to measure the PM 2.5 with the diameter of more than 1 μm through an aircraft inlet. The detailed operation is described elsewhere (i.e., Canagaratna et al, ; DeCarlo et al, ; Drewnick et al, ; Jayne et al, ; Jimenez, ; Lee et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…The HR‐ToF‐AMS was calibrated for ionization efficiency by using 350‐nm ammonium nitrate particles at a number density of ~300 cm −3 . The values of the relative ionization efficiency for other aerosol types including organic aerosol, sulfate, nitrate, ammonium, and chloride were derived from default values (Lee et al, ).…”

Section: Methodsmentioning

confidence: 99%

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A Case Study of the Transport/Transformation of Air Pollutants Over the Yellow Sea During the MAPS 2015 Campaign

Lee

Park

et al. 2019

JGR Atmospheres

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As a case study, the fate of pollutants subjected to long‐range transport over northeast Asia was investigated. These pollutants originated as emitted particulate pollutants from Chinese source area, moved across the Yellow Sea (YS), and entered the Korean Peninsula (KP) during the Megacity Air Pollution Studies Seoul (MAPS‐Seoul) 2015 aircraft field campaign. The MAPS‐Seoul campaign, designed as a precampaign of the Korea‐United States Air Quality (KORUS‐AQ) campaign, was performed to diagnose the air quality around the KP and YS. Of particular interest during the campaign period was the existence of the elevated mixed layer (EML), the lofted layer of highly concentrated fine aerosols, observed in the marine atmosphere in and around the western coast of the KP. The pollutants within EML identified with the bulk Richardson number of 1.2–6.1, transported longer toward the downwind area than within marine boundary layer. As a result, pollutants emitted from Chinese source areas can cross the YS due to the EML and influence the surface air quality on downstream areas, where the inland boundary layer is sufficiently developed. We also analyzed the vertical distribution of the simulated sulfur dioxide (SO2) and sulfate (SO42−) in the EML over China‐YS‐KP belt area and found that the concentration of SO4−2 increases through a hygroscopic conversion process as the gas phase precursors move across the YS in an environment full of water vapor. Therefore, the EML makes the transport of the Chinese plume possible, as it passes over the marine boundary layer, entering downwind area over northeast Asia.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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A Case Study of the Transport/Transformation of Air Pollutants Over the Yellow Sea During the MAPS 2015 Campaign

Lee

Park

et al. 2019

JGR Atmospheres

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“…In East Asia, atmospheric aerosols are a cause of public concern because of the frequent occurrence of haze in megacities and industrial areas, dust storms in deserts and extremely dry regions, and their transboundary transport (Takami et al, 2007;Wu et al, 2009;Kim et al, 2009;Ramana et al, 2010;Kang et al, 2013). These occurrences impact the regional air quality and climate (Li et al, 2011;Huang et al, 2014). Aerosol plumes are able to remain in the atmosphere for up to 10 days and can be transported across the Pacific Ocean.…”

Section: Introductionmentioning

confidence: 99%

Photochemical aging of aerosol particles in different air masses arriving at Baengnyeong Island, Korea

Kang¹,

Lee²,

Brune³

et al. 2018

Atmos. Chem. Phys.

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Abstract. Atmospheric aerosol particles are a serious health risk, especially in regions like East Asia. We investigated the photochemical aging of ambient aerosols using a potential aerosol mass (PAM) reactor at Baengnyeong Island in the Yellow Sea during 4–12 August 2011. The size distributions and chemical compositions of aerosol particles were measured alternately every 6 min from the ambient air or through the highly oxidizing environment of a potential aerosol mass (PAM) reactor. Particle size and chemical composition were measured by using the combination of a scanning mobility particle sizer (SMPS) and a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS). Inside the PAM reactor, O3 and OH levels were equivalent to 4.6 days of integrated OH exposure at typical atmospheric conditions. Two types of air masses were distinguished on the basis of the chemical composition and the degree of aging: air transported from China, which was more aged with a higher sulfate concentration and O  :  C ratio, and the air transported across the Korean Peninsula, which was less aged with more organics than sulfate and a lower O  :  C ratio. For both episodes, the particulate sulfate mass concentration increased in the 200–400 nm size range when sampled through the PAM reactor. A decrease in organics was responsible for the loss of mass concentration in 100–200 nm particles when sampled through the PAM reactor for the organics-dominated episode. This loss was especially evident for the m∕z 43 component, which represents less oxidized organics. The m∕z 44 component, which represents further oxidized organics, increased with a shift toward larger sizes for both episodes. It is not possible to quantify the maximum possible organic mass concentration for either episode because only one OH exposure of 4.6 days was used, but it is clear that SO2 was a primary precursor of secondary aerosol in northeast Asia, especially during long-range transport from China. In addition, inorganic nitrate evaporated in the PAM reactor as sulfate was added to the particles. These results suggest that the chemical composition of aerosols and their degree of photochemical aging, particularly for organics, are also crucial in determining aerosol mass concentrations.

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“…For another 6 minutes, the ambient air was directly pumped into the . Detailed descriptions of the HR-ToF-AMS and the sampling 111 site can be found elsewhere (Lee et al, 2015).…”

mentioning

confidence: 99%

Photochemical aging of organic and inorganic ambient aerosol from the Potential Aerosol Mass (PAM) reactor experiment in East Asia

Kang¹,

Lee²,

Brune³

et al. 2017

Preprint

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Characterization of aerosol composition, concentrations, and sources at Baengnyeong Island, Korea using an aerosol mass spectrometer

Cited by 59 publications

References 47 publications

A Case Study of the Transport/Transformation of Air Pollutants Over the Yellow Sea During the MAPS 2015 Campaign

A Case Study of the Transport/Transformation of Air Pollutants Over the Yellow Sea During the MAPS 2015 Campaign

Photochemical aging of aerosol particles in different air masses arriving at Baengnyeong Island, Korea

Photochemical aging of organic and inorganic ambient aerosol from the Potential Aerosol Mass (PAM) reactor experiment in East Asia

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