TY - JOUR
T1 - Identification and chemical characteristics of distinctive Chinese outflow plumes associated with enhanced submicron aerosols at the gosan climate observatory
AU - Shang, Xiaona
AU - Lee, Meehye
AU - Han, Jihyun
AU - Kang, Eunha
AU - Kim, Sang Woo
AU - Gustafsson, Örjan
AU - Chang, Limseok
N1 - Funding Information:
This research was supported by the Korea Meteorological Administration Research and Development Program under Grant KMIPA 2015-6020. Special thanks should be given to the National Institute of Environmental Research and the Gwangju Institute of Science and Technology for sharing data, and to all the participants in the GoPoEx 2011.
Publisher Copyright:
© Taiwan Association for Aerosol Research.
PY - 2018/2
Y1 - 2018/2
N2 - From October till November in 2010 and during March of 2011, when Chinese outflow events were frequently encountered, the chemical composition of submicron particles (PM1.0) 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 PM1.0concentration 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 > 104cm–3with highly elevated SO2levels, even during the night. When air masses move rapidly from northeastern China to Gosan under strong wind conditions, the Ca2+concentration, along with that of Cl-and Na+, is enhanced in PM1.0, 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 PM1.0plumes from anthropogenic and natural sources, all of which are associated with different kinds of Chinese outflow events.
AB - From October till November in 2010 and during March of 2011, when Chinese outflow events were frequently encountered, the chemical composition of submicron particles (PM1.0) 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 PM1.0concentration 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 > 104cm–3with highly elevated SO2levels, even during the night. When air masses move rapidly from northeastern China to Gosan under strong wind conditions, the Ca2+concentration, along with that of Cl-and Na+, is enhanced in PM1.0, 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 PM1.0plumes from anthropogenic and natural sources, all of which are associated with different kinds of Chinese outflow events.
KW - Chinese outflow plume
KW - Gosan
KW - Haze
KW - Particle-into-liquid sampler
KW - Submicron particles
UR - http://www.scopus.com/inward/record.url?scp=85044149668&partnerID=8YFLogxK
U2 - 10.4209/aaqr.2017.03.0115
DO - 10.4209/aaqr.2017.03.0115
M3 - Article
AN - SCOPUS:85044149668
VL - 18
SP - 330
EP - 342
JO - Aerosol and Air Quality Research
JF - Aerosol and Air Quality Research
SN - 1680-8584
IS - 2
ER -
