Characterization of PM and identification of transported secondary and biomass burning contribution in Seoul, Korea.

The chemical and seasonal characteristics of fine particulates in Seoul, Korea, were investigated based on 24-h integrated PM measurements made over four 1-month periods in each season between October 2012 and September 2013. The four-season average concentration of PM was 37 μg m, and the major chemical components were secondary inorganic aerosol (SIA) species of sulfate, nitrate, and ammonium (49%), followed by organic matter (34%). The mass concentration and most of the chemical components of PM showed clear seasonal variation, with a winter-high and summer-low pattern.

Characterization of PM and PM in the South Coast Air Basin of Southern California: Part 2-Temporal Variations.

The South Coast Air Quality Management District (SCAQMD) conducted a 1-year special particulate monitoring study from January 1995 to February 1996. This monitoring data indicates that high PM and PM concentrations were observed in the fall (October, November, and December), with November concentrations being the highest. During the rest of the year, PM and PM masses gradually increased from January to September.

Characterization of PM and PM in the South Coast Air Basin of Southern California: Part 1-Spatial Variations.

In December 1994, the South Coast Air Quality Management District (SCAQMD) initiated a comprehensive program, the PM Technical Enhancement Program (PTEP), to characterize fine PM in the South Coast Air Basin (SCAB). A 1-year special particulate monitoring project was conducted from January 1995 to February 1996 as part of the PTEP. Under this enhanced monitoring, HNO, NH, and speciated PM and PM concentrations were measured at five stations (Anaheim, downtown Los Angeles, Diamond Bar, Fontana, and Rubidoux) in the SCAB and at one background station at San Nicolas Island.

Diagnostics for Determining Influential Species in the Chemical Mass Balance Receptor Model.

The chemical mass balance (CMB) model can be applied to estimate the amount of airborne particulate matter (PM) coming from various sources given the ambient chemical composition of the particles measured at the receptor and the chemical composition of the source emissions. Of considerable practical importance is the identification of those chemical species that have a large effect on either the source contributions or errors estimated by the CMB model. This paper details a study of a number of influential diagnostics for application of the CMB software.

Nitrate Artifacts during PM Sampling in the South Coast Air Basin of California.

In February 1993, the South Coast Air Basin (SCAB) was redesignated as a "serious" nonattainment area for PM10. To improve the understanding and characterization of fine particulate matter in the SCAB, the South Coast Air Quality Management District (SCAQMD) initiated a comprehensive PM Technical Enhancement Program (PTEP). Using enhanced PTEP monitors (specially designed multichannel/multifilter samplers), a one-year fine particulate matter (PM) monitoring program was initiated in January 1995.