Optical and hygroscopic properties of long‐range transported haze plumes observed at Deokjeok Island off the west coast of the Korean Peninsula under the Asian continental outflows

Jung, Jinsang; Lee, Kwangyul; Cayetano, Mylene G.; Batmunkh, Tsatsral; Kim, Young Jin

doi:10.1002/2015jd023154

Cited by 15 publications

(11 citation statements)

References 65 publications

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“…The PM10, PM2.5 and PM1 mass and number concentrations were measured at Donglu and Chenggong stations using an environmental dust monitor (Grimm EDM 180-MC, GRIMM Aerosol Technik GmbH & Co. KG) (Jung et al, 2015;Khan et al, 2016) at an interval of 5 min. The precision of the Grimm 180 instrument is ±2% for PM10, PM2.5 and PM1, and the environmental dust monitor was annually calibrated.…”

Section: Pm Concentration Datamentioning

confidence: 99%

Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China

Fan

Li³

et al. 2021

Aerosol Air Qual. Res.

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A comprehensive assessment of the main pollution characteristics of particulate matter (PM) in the low-latitude plateau (LoLaP) region in China by utilizing observation and reanalysis data and statistical methods is presented to reveal influences of the Kunming quasi-stationary front (KMQSF) on PM concentration in LoLaP in winter. It is found that the location and intensity of the KMQSF significantly influenced the distribution pattern of PM and induced high concentrations in some areas in LoLaP region in a typical pollution event in 2016. Furthermore, all the KMQSF synoptic weathers over LoLaP region from 2014-2019 were investigated and classified into 9 Patterns, which led to different air pollution patterns in LoLaP region. When the KMQSF moved westward from middle LoLaP, the PM could be transported to west part of LoLaP by the easterly wind, which led to the daily mean PM10 and PM2.5 concentrations increase in Kunming, a central city in the west part of LoLaP, at the same time, high concentrations of PM10 and PM2.5 maintained in Guiyang, a central city locating in the east part of LoLaP. When the KMQSF gradually retreated from west part of LoLaP to east part, the PM in Kunming decreased with a strengthening of the westerly, and the PM in Guiyang further increased with a decrease of the planetary boundary layer (PBL) height and boundary layer dissipation (BLD). When the KMQSF disappeared, the formation of calm inversion pollution could be caused, including a shallow PBL and weak BLD in whole LoLaP, which induced the highest daily mean PM10 and PM2.5 concentrations both in the two central cities in all patterns.

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Section: Pm Concentration Datamentioning

confidence: 99%

Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China

Fan

Li³

et al. 2021

Aerosol Air Qual. Res.

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“…This region is significantly influenced by the Siberian cold high pressure systems in winter. The Siberian anticyclone transports air pollutants from Northeast China to Korea, Japan, and even the Arctic, and further causes large-scale influences in the global climate (Jung et al, 2015;Rodo et al, 2014;Sobhani et al, 2018;Zhang et al, 2016). Therefore, understanding the physicochemical characteristics of anthropogenic fine particles in regional haze and regional haze formation mechanisms over Northeast China has to be considered of the utmost importance.…”

Section: Northeast China Is Only One Intense Anthropogenic Emission Rmentioning

confidence: 99%

Exploring wintertime regional haze in Northeast China: role of coal and biomass burning

Zhang¹,

Liu²,

Li³

et al. 2020

Preprint

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Abstract. As one of the intense anthropogenic emission regions across the relatively high latitude (>&#8201;40&#176;&#8201;N) areas on the Earth, Northeast China faces serious problem on regional haze during long winter with half a year. Aerosols in polluted haze in Northeast China are poorly understood compared with the haze in other regions of China such as North China Plain. Here, we for the first time integrated bulk chemical measurements with single particle analysis from transmission electron microscopy (TEM), nanoscale secondary ion mass spectrometer (NanoSIMS), and atomic force microscopy (AFM) to obtain morphology, size, composition, aging process, and sources of aerosol particles collected during two contrasting regional haze events (Haze-I and Haze-II) at an urban site and a mountain site in Northeast China, and further investigated the causes of regional haze formation. Haze-I evolved from moderate (average PM2.5: 76&#8211;108&#8201;&#956;g/m3) to heavy pollution (151&#8211;154&#8201;&#956;g/m3), with the dominant PM2.5 component changing from organic matter (OM) (39&#8211;45&#8201;&#956;g/m3) to secondary inorganic ions (94&#8211;101&#8201;&#956;g/m3). Similarly, TEM observations showed that S-OM particles elevated from 29&#8201;% to 60&#8201;% by number at urban site and 64&#8201;% to 74&#8201;% at mountain site and 75&#8211;96&#8201;% of Haze-I particles included primary OM. Change of wind direction induced that Haze-I rapidly turned into Haze-II (185&#8211;223&#8201;&#956;g/m3) with the predominant OM (98&#8211;133&#8201;&#956;g/m3) and unexpectedly high K+ (3.8&#8201;&#956;g/m3). TEM also showed that K-OM particles increased from 4&#8211;5&#8201;% by number to 50&#8211;52&#8201;%. Our study revealed a contrasting formation mechanism of these two haze events: Haze-I was induced by accumulation of primary OM emitted from residential coal burning and further deteriorated by secondary aerosol formation via heterogeneous reactions; Haze-II was caused by long-range transport of agricultural biomass burning emissions. Moreover, we found that 75&#8211;97&#8201;% of haze particles contained tarballs, but only 4&#8211;23&#8201;% contained black carbon and its concentrations were low at 2.7&#8211;4.3&#8201;&#956;g/m3. The results highlight that abundant tarballs are important light-absorbing brown carbon in Northeast China during winter haze and further considered in climate models.

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“…Long-range transport (LTP) aerosols play an important role in the elevated mass concentration of submicrometer particles in East Asia [8][9][10]. It has often been observed that the chemical constituents in PM less than 1 µm (PM 1 ) or 2.5 µm (PM 2.5 ) were dependent on the types of long-range transported air mass arriving at sites [7,8,11,12].…”

Section: Introductionmentioning

confidence: 99%

A Study on Elevated Concentrations of Submicrometer Particles in an Urban Atmosphere

et al. 2018

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Mass concentrations of chemical constituents (organics, nitrate, sulfate, ammonium, chloride, and black carbon (BC)) and the number size distribution of submicrometer particles in the ambient atmosphere were continuously measured in urban Gwangju, Korea, during the Megacity Air Pollution Studies (MAPS)-Seoul campaign. Organics (9.1 μg/m3) were the most dominant species, followed by sulfate (4.7 μg/m3), nitrate (3.2 μg/m3), ammonium (2.6 μg/m3), and BC (1.3 μg/m3) in submicrometer particles (particulate matter less than 1 μm (PM1)). The potential source regions of the sulfate were located in the South and East regions of China and South and East regions of Korea, while local sources were responsible for the elevated BC concentration. Diurnal variation showed that concentrations of organics, nitrate, ammonium, chloride, and BC decreased with increasing mixing layer and wind speed (dilution effect), while sulfate and oxidized organics increased possibly due to their strong photochemical production in the afternoon. During the campaign, an elevated mass concentration of PM1 (PM1 event) and number concentration (nanoparticle formation (NPF) event) were observed (one PM1 event and nine NPF events out of 28 days). The PM1 event occurred with Western and Southwestern air masses with increasing sulfate and organics. Long-range transported aerosols and stagnant meteorological conditions favored the elevated mass concentration of submicrometer particles. Most of the NPF events took place between 10:00 and 14:00, and the particle growth rates after the initial nanoparticle formation were 7.2–11.0 nm/h. The times for increased concentration of nanoparticles and their growth were consistent with those for elevated sulfate and oxidized organics in submicrometer particles under strong photochemical activity.

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Optical and hygroscopic properties of long‐range transported haze plumes observed at Deokjeok Island off the west coast of the Korean Peninsula under the Asian continental outflows

Cited by 15 publications

References 65 publications

Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China

Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China

Exploring wintertime regional haze in Northeast China: role of coal and biomass burning

A Study on Elevated Concentrations of Submicrometer Particles in an Urban Atmosphere

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