Asian Journal of Atmospheric Environment
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Comparison between Atmospheric Chemistry Model and Observations Utilizing the RAQMS-CMAQ Linkage, Part II : Impact on PM2.5 Mass Concentrations Simulated
Asian Journal of Atmospheric Environment - Tập 8 - Trang 108-114 - 2014
In the companion paper (Lee et al., 2012), it was showed that CMAQ simulation using a lateral boundary conditions (LBCs) derived from RAQMS-CMAQ linkage, compared to the CMAQ results with the default CMAQ LBCs, improved ozone simulations in the conterminous US domain. In the present paper, the study is extended to investigate the influence of LBCs on PM2.5 simulation. MM5-SMOKE-CMAQ modeling syste...... hiện toàn bộ
A Test of Relative Removal Properties of Various Offensive Odors by Zeolite
Asian Journal of Atmospheric Environment - Tập 11 - Trang 15-28 - 2017
The adsorptive removal properties of synthetic A4 zeolite were investigated against a total of 16 offensive odors consisting of reduced sulfur compounds (RSCs), nitrogenous compounds (NCs), volatile fatty acids (VFAs), and phenols/indoles (PnI). Removal of these odors was measured using a laboratory-scale impinger-based adsorption setup containing 25 g of the zeolite bed (flow rate of 100 mL min−1...... hiện toàn bộ
NOx-VOC-O3 Sensitivity in Urban Environments of Sri Lanka
Asian Journal of Atmospheric Environment - Tập 13 - Trang 62-72 - 2019
Physical phenomenon of the relation among the ground level O3, NOx and VOC governed by complex nonlinear photochemistry in urban environments is explained in detail using the ambient pollutant concentration data of eleven cities in Sri Lanka. The time-series analysis was conducted using the 24-hour average ambient concentrations of PM10, NO2, CO, O3 and SO2 air pollutants obtained from fixed air p...... hiện toàn bộ
Wet Deposition Fluxes of Ions Contributed by Cyclone-, Stationary Front- and Typhoon-associated Rains at the Southwestern Japan Coast
Asian Journal of Atmospheric Environment - Tập 10 - Trang 57-66 - 2016
Wet deposition fluxes of ions at a coastal site in southwestern Japan in the period 1996–2003 were investigated to quantify the respective contributions of cyclone-, stationary front- and typhoon-associated rains. On average, the deposition fluxes of terrigenous-origin ions, nss-SO42−, NO3−, NH4+ and nss-Ca2+ were 37.6±7.3, 16.3±4.2, 19.0±3.4 and 9.6±4.8 meq m−2 yr−1, and those of Na+ and Cl−, the...... hiện toàn bộ
Assessment of Sources and Pollution Level of Airborne Toxic Metals through Foliar Dust in an Urban Roadside Environment
Asian Journal of Atmospheric Environment - Tập 16 - Trang 1-24 - 2023
Concentrations of 19 elements (Al, Fe, Ca, K, Mg, Na, S, Ti, Ba, Sr, Zn, V, Cu, Mn, Cr, Pb, Ni, Co, and Cd) in foliar dust samples were determined from 6 different roadside locations of Bilaspur city (Chhattisgarh), India. Principal component analysis (PCA) indicated the significance of vehicular activities followed by sources such as firework events and other industrial/regional/transboundary sou...... hiện toàn bộ
Comparison of the Chemical Characteristics and Toxicity of PM2.5 Collected Using Different Sizes of Cyclones
Asian Journal of Atmospheric Environment - Tập 16 - Trang 1-19 - 2022
Cyclone sampling devices have been helpful in assessing the toxic effects of fine particulate matter (PM2.5). The particle collection efficiency of sampling devices is critical. This study investigated the effect of cyclone size on particle size, chemical composition, and particle toxicity. Three cyclones with different inner diameters (12–68 mm) were tested for penetration using an aerodynamic pa...... hiện toàn bộ
Effects of Asian Dust (KOSA) Deposition Event on Bacterial and Microalgal Communities in the Pacific Ocean
Asian Journal of Atmospheric Environment - Tập 5 - Trang 157-163 - 2011
Atmospheric aerosol deposition caused by Asian dust (KOSA) events provide nutrients, trace metals, and organic compounds over the Pacific Ocean that enhance ocean productivity and carbon sequestration and, thus, influence the atmospheric carbon dioxide concentrations and climate. Using dust particles obtained from the snow layers on Mt. Tateyama and the surface sand of Loess Plateau in incubation ...... hiện toàn bộ
Sensitivity analysis of volatile organic compounds to PM2.5 concentrations in a representative industrial city of Korea
Asian Journal of Atmospheric Environment - Tập 17 - Trang 1-12 - 2023
This study aims to analyze the sensitivity of volatile organic compounds (VOCs) to ambient concentrations of fine particles (PM2.5) in the representative industrial city of Ulsan, Korea. For the calculation of sensitivity coefficients between VOCs and PM2.5 (SVOCs-PM2.5), PM2.5 data were obtained from an air quality monitoring station, and their corresponding 6-h average concentrations of VOCs (al...... hiện toàn bộ
Chemical Characterization of Water-Soluble Organic Acids in Size-Segregated Particles at a Suburban Site in Saitama, Japan
Asian Journal of Atmospheric Environment - Tập 3 - Trang 42-51 - 2009
Saturated n-dicarboxylic acids (C2-C7, C9), unsaturated dicarboxylic acids (maleic, fumaric, phthalic acid), ketocarboxylic acids (pyruvic, glyoxylic acid), and dicarbonyls (glyoxal, methylglyoxal) were determined in size-segregated samples with a high-volume Andersen air sampler at a suburban site in Saitama, Japan, May 12–17 and July 24–27, 2007 and January 22–31, 2008. The seasonal average conc...... hiện toàn bộ
Internal Mixing of Pollutants for Submicron Particles Observed during Springtime in Japan
Asian Journal of Atmospheric Environment - Tập 3 - Trang 27-41 - 2009
Internally mixed states of submicron particles during transport from the Asian continent to the Pacific Ocean were analyzed using a single-particle time-of-flight mass spectrometer. The observation was conducted at Tsukuba in Japan in the spring of 2005 in order to investigate springtime transport of particles from the continent. The sum of ion intensities of sulfate (HSO4-) detected in particles ...... hiện toàn bộ
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