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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Atmospheric Environment
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Journal DOI :
Korean Society for Atmospheric Environment
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Volume & Issues
Volume 19, Issue 6 - Dec 2003
Volume 19, Issue 5 - Oct 2003
Volume 19, Issue 4 - Aug 2003
Volume 19, Issue 3 - Jun 2003
Volume 19, Issue 2 - Apr 2003
Volume 19, Issue 1 - Feb 2003
Volume 19, Issue E4 - 00 2003
Volume 19, Issue E3 - 00 2003
Volume 19, Issue E2 - 00 2003
Volume 19, Issue E1 - 00 2003
Selecting the target year
Characteristics and Status of Persistent Organic Pollutants and Heavy Metals in Ambient Air
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 113~132
In May 2001, the Stockholm Convention on Persistent Organic Pollutants (POPs) for phasing out and eliminating POPs was signed by 90 countries at the Diplomatic Meeting in Stockholm. In 1998, three years before the Convention, the protocols on POPs and heavy metals were adopted by the United Nations Economic Commission for Europe under the Convention on Long-Range Transboundary Air Pollution. Growing attention on POPs and heavy metals during the past 10 years is primarily due to their toxicity in minute quantities. POPs and some metal compounds are even more toxic because of their bioaccumulation potentials associated with a high lipid solubility. Furthermore, owing to their persistence and semi - volatility, they are widely distributed in the environment, traveling great distances on wind and water currents. Recent international cooperation to address POPs and heavy metals has focused on these issues. Long -range transport of those pollutants are particularly concerned since Korea is located downwind of prevailing westerlies from China. In this paper, a review is provided to assess the properties, sources, emissions, and atmospheric concentrations on POPs and heavy metals.
An Analysis of Characteristics of Particulate Matter Exhausted from Diesel Locomotive Engines
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 133~143
Numerous evidence have been reported that fine particulate matters can play an important role in threatening human health. Recently concerns on fine particle pollution from various engines may require re-examination of particulate emission standards. The particles emitted by most diesel engines are mainly divided into their size ranges such as Dp< 50 nm and 50 nm< Dp< 1,000 nm. In this work, the number concentration and the size distribution of fine particles emitted from an exhaust manifold of a railroad diesel engine were measured under load test conditions using a scanning mobility particle sizer (SMPS). The fine particles observed were within the range of 7 to 304 nm under different load conditions with two different dilution ratios. The fine particles exhibited unique patterns showing bimodal shapes in size distribution.
Compositions and Characteristics of Atmospheric Aerosols Collected at the 1100 Site in Mt. Halla, Jeiu
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 145~156
The atmospheric aerosols collected at the 1100 site located in Mt. Halla have been analyzed to investigate their compositions and chemical characteristics . The average concentrations of water-soluble cations were in the order of N
during the spring, showing high increase of
concentration with the value of 0.60
, and N
during the other seasons. The average concentrations of anions have shown in the order of S
for all seasons, and S
had higher concentrations in spring with the values of 4.84
, respectively. From the analytical data of size-segregated particles by cascade impactor sampling, the components of N
were distributed mainly in fine particles, but
were included mostly in coarse particles. The correlation coefficients of nss-S
showed quite high values with 0.871, 0.857 and 0.654, respectively Based on the study of enrichment factors, it is considered that N
components were delivered from oceanic and soil sources, but S
might have other source origins. The factor analysis study showed the aerosol at the 1100 site was influenced mainly by anthropogenic factors, followed by oceanic and soil factors. followed by oceanic and soil factors.
Decomposition of Acetonitrile Using a Planar Type Dielectric Barrier Discharge Reactor Packed with Adsorption and Catalyst Materials
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 157~165
A combined process of non-thermal plasma and catalytic technique has been investigated to treat
CN gas in the atmosphere. A planar type dielectric barrier discharge (DBD) reactor has been used to generate the non-thermal plasma that produces various chemically active species, such as O, N, OH,
, ion, electrons, etc. Several different types of the beads. which are Molecular Sieve (MS) 5A, MS 13X, Pt/alumina beads, are packed into the DBD reactor, and have been tested to characterize the effects of adsorption and catalytic process on treating the
CN gas in the DBD reactor. The test results showed that the operating power consumption and the amounts of the by-products of the non-thermal plasma process can be reduced by the assistance of the adsorption and catalytic process.
Characteristics of Urban Aerosol Number Size Distribution in Seoul during the Winter Season of 2001
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 167~177
The number size distribution of urban aerosols ranging from 0.02 to 20
in diameter was measured by using a scanning mobility particle sizer (SMPS) system and an aerodynamic particle sizer spectrometer (APS) at Seoul from November 30,2001 to January 14, 2002. The gaseous species such as CO, NO, NO
were also continuously monitored. The daily average concentration of urban aerosols sorted into three groups (0.02~0.1
) and the typical number, surface, and volume distributions of urban aerosols were discussed in this paper. The weekly variation of aerosol concentration was compared with those of gaseous concentrations. relative humidity, and visibility. The results showed that the particle number concentration seemed to increase in the morning and the number concentration of fine particles less than 1 fm in diameter seemed to increase when the concentrations of CO, NO, and NO
were high. The number concentration of fine particles was relatively high when the relative humidity was greater than 70％ during the increasing period of relative humidity. The visibility was weakly correlated with the concentration of aerosols ranging 0.1 to 1
, and the number size distribution for high visibility episode was apparently different from that for low visibility episode.
The Long-term Variation Patterns of Atmospheric Mercury in Seoul, Korea from 1997 to 2002
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 179~189
The concentration of gaseous elemental mercury (Hg) was measured concurrently with relevant environmental parameters from Yang-Jae monitoring station in Seoul during Sept. 1997 to June 2002. Although data collection was disrupted for certain periods, the grand mean concentration of Hg for this five year period was found at 5.32
3.53 ng m
(N = 27,170). Because of short resolution of data acquisition, we were able to examine the temporal variability of Hg at varying time scale. The diurnal variability of Hg, when investigated for each of those five years, indicated consistently the dominance of nighttime over daytime. If examined at seasonal scale, Hg level was systematically higher during winter/spring than summer/fall period. The results of this short-term variability were best explained by the combined effects of such factors as meteorological conditions (formation of inversion layer and seasonal changes) and anthropogenic source processes. However, examination of long-term variation Pattern was much more complicated to explain. Thus, extension of our study is needed to diagnose the future direction in long-term trend of Hg behavior.
Prediction of Temporal Variation of Son Concentrations in Rainwater
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 191~204
A one dimensional time dependent acid rain model considering size distribution of aerosols and hydrometeors is developed to predict observed chemical and physical properties of precipitation. Temporal variations of anions and cations observed are predicted fairly well with acid rain model simulations. It is found that aerosol depletion rates are highly dependent on aerosol sizes under the assumption of Marshall - Palmer raindrop size distribution. Also, the aerosol depletion during the initial rain event largely influences on ion concentrations in rainwaters.
Risk-based Priority Ranking for Air Pollution Problems in Seoul
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 205~216
We have gathered exposure data on ambient air quality level and investigated dose-response slope factors of air pollutants such as fine particle, HAPs (metals, VOCs, PAHs) and dioxins in Seoul. Theoretical mortality incidences were estimated from exposure to these pollutants. From the results, priorities were ranked in the order fine particle, metals, VOCs, dioxins and PAHs by ordinal scale, and the uncertainties relative to those risk estimates were described.
Estimation of Nitrogen and Sulfur Deposition over the Yellow Sea Region
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 217~229
The amounts of nitrogen and sulfur deposited in the region of the Yellow Sea in both dry and wet forms were estimated by using the measurement data published in tile literature during tile past 10 years. In the estimation of dry deposition, concentrations at ground stations including those at a station on the Chinese side and concentrations from shipboard and aircraft measurements were used as well as deposition velocities. Wet deposition flux was determined at ground stations on the Korean side either by taking the flux data themselves or by calculating them from precipitation data in the literature. The dry deposition flux over the Yellow Sea was much greater than those China was confirmed from the fact that the total amount summing wet and dry depositions exceeded the emission amount from Korea. Dry deposition was principally made in the gaseous form due to a larger deposition velocity. Nevertheless, since the deposition velocity over water was smaller than that over the ground, dry deposition of oxidized nitrogen was smaller than wet deposition. As a whole, wet depositions of nitrogen and sulfur were 2.3 and 1.9 times 1arger than corresponding dry depositions, respectively.
Variations of the PM
Concentrations Observed in Eleven Cities in South Korea between 1995 and 2000
Journal of Korean Society for Atmospheric Environment, volume 19, issue 2, 2003, Pages 231~245
concentrations measured at 11 sites in Seoul and 10 sites in the large cities over South Korea for the period from March 1995 to February 2000 are analyzed to examine annual trend and monthly variations of the PM
concentrations. Further analysis has been carried out by using the one year data from March 1999 to February 2000 to see the seasonal variation, diurnal variation and weekly variation of the seasonally averaged PM
concentrations at each site. Weekly variations of the CO concentrations at the same sites for the same one year period are compared with that of the PM
concentration. There is no significant annual trend in the variation of the PM
concentration at all the sites analyzed. The seasonal and monthly mean concentrations show a minimum concentration in summer and alternative maximum concentration in spring and winter for most sites. The diurnal variation of the seasonally averaged mean PM
concentrations is strongly affected by traffic loads and meteorological conditions. The weekly variation of seasonal averaged concentrations of CO and PM
shows a high concentration for weekdays in spring, autumn and winter while high concentration for weekends in summer.nds in summer.