Analysis of a decade of Asian outflow of PM10 and TSP to Gosan, Korea; also incorporating Radon–222

Crawford, Jagoda; Chambers, Scott D.; Kang, Chang‐Hee; Griffiths, Alan D.; Kim, Won-Hyung

doi:10.5094/apr.2015.059

Cited by 9 publications

(2 citation statements)

References 47 publications

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“…Air mass back trajectories used in this study were calculated using the PC version of HYSPLIT v4.0 (HYbrid Single-Particle Lagrangian Integrated Trajectory; Draxler and Rolph, 2003), with a starting height of 200 m (see Crawford et al, 2015 for further details). All times reported are local (LST = UTC + 9 h), and the northern hemisphere seasonal convention is used.…”

Section: Pollution and Climatology Observationsmentioning

confidence: 99%

Improving the Representation of Cross-Boundary Transport of Anthropogenic Pollution in East Asia Using Radon-222

Chambers

Kang

Williams

et al. 2016

Aerosol Air Qual. Res.

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We report on 10 years of hourly atmospheric radon, CO, and SO 2 observations at Gosan Station, Korea. An improved radon detector was installed during this period and performance of the detectors is compared. A technique is developed whereby the distribution of radon concentrations from a fetch region can be used to select air masses that have consistently been in direct contact with land-based emissions, and have been least diluted en route to the measurement site. Hourly radon concentrations are used to demonstrate and characterise contamination of remote-fetch pollution observations by local emissions at this key WMO GAW site, and a seasonally-varying 5-hour diurnal sampling window is proposed for days on which diurnal cycles are evident to minimise these effects. The seasonal variability in mixing depth and "background" pollutant concentrations are characterised. Based on a subset of observations most representative of the important regional fetch areas for this site, and least affected by local emissions, seasonal estimates of CO and SO 2 in air masses originating from South China, North China, Korea and Japan are compared across the decade of observations.

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Section: Pollution and Climatology Observationsmentioning

confidence: 99%

Improving the Representation of Cross-Boundary Transport of Anthropogenic Pollution in East Asia Using Radon-222

Chambers

Kang

Williams

et al. 2016

Aerosol Air Qual. Res.

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“…During 2000-2013 the average PM 10 mass concentration ranged from 70 to 239 µg m -3 in different regions of Xinjiang with a highest annual concentration of 582 µg m -3 . It is well known that PM 10 levels in Korea are heavily dependent on dust outbreaks transported from China (Ahmed et al, 2015;Crawford et al, 2015). Soil particles that originate from desert regions in northwestern China are efficiently transported by frontal systems to the Korean peninsula, Japan, and eventually to the west coast of the US (Hanaoka et al, 2011;.…”

Section: Introductionmentioning

confidence: 99%

Identification and Chemical Characteristics of Distinctive Chinese Outflow Plumes Associated with Enhanced Submicron Aerosols at the Gosan Climate Observatory

Shang

Lee

Han

et al. 2018

Aerosol Air Qual. Res.

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From October till November in 2010 and during March of 2011, when Chinese outflow events were frequently encountered, the chemical composition of submicron particles (PM 1.0 ) was determined hourly using a particle-into-liquid sampler at the Gosan Climate Observatory. Three distinctive pollution plume types were identified: haze aerosols impacted by biomass combustion, nanoparticle bursts associated with outflow from Beijing, and saline soil particles from salt deposits. The highest PM 1.0 concentration was observed in a fall haze event, under near-stagnant high-pressure synoptic conditions that were characterized by the lowest visibility (< 5 km) and the highest K + and OC concentrations, indicating the influence of biomass combustion. When strong high-pressure systems develop in China, they efficiently export fresh urban emissions from Beijing to the study region, as distinguished by nanoparticle bursts of > 10 4 cm -3 with highly elevated SO 2 levels, even during the night. When air masses move rapidly from northeastern China to Gosan under strong wind conditions, the Ca 2+ concentration, along with that of Cl -and Na + , is enhanced in PM 1.0 , which is attributed to the influence of saline transport from dry lakes. The results of this study reveal compositional details and information on both number and mass concentration for different PM 1.0 plumes from anthropogenic and natural sources, all of which are associated with different kinds of Chinese outflow events.

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Influences of Long‐Range Transported Air Pollutants on Atmospheric TSP Aerosol Compositions at Jeju Island of Korea during 2011–2013

Song

Kim

et al. 2016

Bulletin Korean Chem Soc

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Atmospheric total suspended particulate aerosols were collected at the Gosan site of Jeju Island during 2011-2013, and their major water-soluble ionic and elemental species were analyzed in order to examine the chemical composition change and pollution characteristics change between Asian dust (AD) and non-Asian dust (NAD) periods. The comparison of the aerosol compositions showed that the concentrations of soil-originated species such as nss-Ca 2+ , Al, Fe, Ti, Mn, Ba, and Sr increased by as much as 4.5-18.6 times during the AD periods. Meanwhile, the concentrations of nss-SO 4 2− and NO 3 − , typical secondary aerosol species, increased 1.2 and 2.5 times, respectively. On the contrary, NH 4 + concentration decreased slightly during the AD periods, probably because of the neutralization reaction of acidic ammonium ion with basic calcium carbonate. A comparison of ion balances suggested that the carbonate contents in AD are likely much larger than those of NAD. Based on a cluster back-trajectory analysis, it was found that the concentrations of anthropogenic and soil-sourced components, such as nss-SO 4 2− , NO 3 − , NH 4 + , and nss-Ca 2+ , increased when an air mass moved into Jeju Island from the China continent, but decreased when an air mass moved from the North Pacific Ocean.

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Analysis of a decade of Asian outflow of PM10 and TSP to Gosan, Korea; also incorporating Radon–222

Cited by 9 publications

References 47 publications

Improving the Representation of Cross-Boundary Transport of Anthropogenic Pollution in East Asia Using Radon-222

Improving the Representation of Cross-Boundary Transport of Anthropogenic Pollution in East Asia Using Radon-222

Identification and Chemical Characteristics of Distinctive Chinese Outflow Plumes Associated with Enhanced Submicron Aerosols at the Gosan Climate Observatory

Influences of Long‐Range Transported Air Pollutants on Atmospheric TSP Aerosol Compositions at Jeju Island of Korea during 2011–2013

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