Characterization and sources of black carbon in PM2.5at a site close to a roadway in Gwangju, Korea, during winter

2015 ◽  
Vol 17 (10) ◽  
pp. 1794-1805 ◽  
Author(s):  
Seung Shik Park ◽  
Kwon-Ho Lee
Keyword(s):  
Black Carbon ◽  
Regional Transport ◽  
Air Masses ◽  
Source Contribution ◽  
Potential Source ◽  
Local Sources ◽  
Potential Source Contribution Function ◽  
A Site ◽  
Local Emissions

Potential source contribution function maps for black carbon (BC) observed at a roadway site indicate that the BC observed during episode “A” was most likely attributed to local emissions, while local sources and regional transport of air masses contributed to the enhanced BC concentrations during episode “B”.

scholarly journals On the multiday haze in the Asian continental outflow: the important role of synoptic conditions combined with regional and local sources

2017 ◽  
Vol 17 (15) ◽  
pp. 9311-9332 ◽  
Author(s):  
Jihoon Seo ◽  
Jin Young Kim ◽  
Daeok Youn ◽  
Ji Yi Lee ◽  
Hwajin Kim ◽  
...  
Keyword(s):  
Meteorological Factors ◽  
Early Stage ◽  
Meteorological Conditions ◽  
The Yellow Sea ◽  
Regional Transport ◽  
Local Sources ◽  
Haze Episode ◽  
High Concentrations ◽  
Continental Outflow ◽  
Local Emissions

Abstract. The air quality of the megacities in populated and industrialized regions like East Asia is affected by both local and regional emission sources. The combined effect of regional transport and local emissions on multiday haze was investigated through a synthetic analysis of PM2. 5 sampled at both an urban site in Seoul, South Korea and an upwind background site on Deokjeok Island over the Yellow Sea during a severe multiday haze episode in late February 2014. Inorganic components and carbonaceous species of daily PM2. 5 samples were measured, and gaseous pollutants, local meteorological factors, and synoptic meteorological conditions were also determined. A dominance of fine-mode particles (PM2. 5 ∕ PM10  ∼  0.8), a large secondary inorganic fraction (76 %), high OC ∕ EC (> 7), and highly oxidized aerosols (oxygen-to-carbon ratio of  ∼  0.6 and organic-mass-to-carbon ratio of  ∼  1.9) under relatively warm, humid, and stagnant conditions characterize the multiday haze episode in Seoul; however, the early and late stages of the episode show different chemical compositions of PM2. 5. High concentrations of sulfate in both Seoul and the upwind background in the early stage suggest a significant regional influence on the onset of the multiday haze. At the same time, high concentrations of nitrate and organic compounds in Seoul, which are local and highly correlated with meteorological factors, suggest the contribution of local emissions and secondary formation under stagnant meteorological conditions to the haze. A slow eastward-moving high-pressure system from southern China to the East China Sea induces the regional transport of aerosols and potential gaseous precursors for secondary aerosols from the North China Plain in the early stage but provides stagnant conditions conducive to the accumulation and the local formation of aerosols in the late stage. A blocking ridge over Alaska that developed during the episode hinders the zonal propagation of synoptic-scale systems and extends the haze period to several days. This study provides chemical insights into haze development sequentially by regional transport and local sources, and shows that the synoptic condition plays an important role in the dynamical evolution of long-lasting haze in the Asian continental outflow region.

Atmospheric aerosol over Finnish Arctic: source analysis by the multilinear engine and the potential source contribution function

2003 ◽  
Vol 37 (31) ◽  
pp. 4381-4392 ◽  
Author(s):  
Tarja Yli-Tuomi ◽  
Philip K. Hopke ◽  
Pentti Paatero ◽  
M.Shamsuzzoha Basunia ◽  
Sheldon Landsberger ◽  
...  
Keyword(s):  
Atmospheric Aerosol ◽  
Source Analysis ◽  
Source Contribution ◽  
Potential Source ◽  
Multilinear Engine ◽  
Potential Source Contribution Function

scholarly journals Potential Source Contribution Function Analysis of High Latitude Dust Sources over the Arctic: Preliminary Results and Prospects

Atmosphere ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 347
Author(s):  
Stefano Crocchianti ◽  
Beatrice Moroni ◽  
Pavla Dagsson Waldhauserová ◽  
Silvia Becagli ◽  
Mirko Severi ◽  
...  
Keyword(s):  
Transport Processes ◽  
The Arctic ◽  
Geochemical Data ◽  
Back Trajectory ◽  
Source Contribution ◽  
Source Areas ◽  
Geochemical Properties ◽  
Potential Source ◽  
Dust Sources ◽  
Potential Source Contribution Function

The results of a preliminary investigation of the dust sources in the Arctic based on their geochemical properties by potential source contribution function (PSCF) analysis are presented in this paper. For this purpose, we considered one year of aerosol geochemical data from Ny-Ålesund, Svalbard, and a short list of chemical elements (i.e., Al, Fe, Mn, Ti, Cr, V, Ni, Cu, and Zn) variably related to the dust fraction. Based on PSCF analysis: (i) four different dust source areas (i.e., Eurasia, Greenland, Arctic-Alaska, and Iceland) were characterized by distinguishing geochemical ranges and seasonal occurrence; and (ii) a series of typical dust days from the distinct source areas were identified based on the corresponding back trajectory patterns. Icelandic dust samples revealed peculiar but very variable characteristics in relation to their geographical source regions marked by air mass back trajectories. The comparison between pure and mixed Icelandic dust samples (i.e., aerosols containing Icelandic dust along with natural and/or anthropogenic components) revealed the occurrence of different mixing situations. Comparison with Icelandic soils proved the existence of dilution effects related to the emission and the transport processes.

Identification of sources of pollutants in precipitation measured at the mid-Atlantic US coast using potential source contribution function (PSCF)

2001 ◽  
Vol 35 (23) ◽  
pp. 3979-3986 ◽  
Author(s):  
Derrick Lucey ◽  
Lubomir Hadjiiski ◽  
Philip K. Hopke ◽  
Joseph R. Scudlark ◽  
Thomas Church
Keyword(s):  
Source Contribution ◽  
Potential Source ◽  
Potential Source Contribution Function
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