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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society for Atmospheric Environment
Journal Basic Information
Journal DOI :
Korean Society for Atmospheric Environment
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Volume & Issues
Volume 11, Issue 4 - Dec 1995
Volume 11, Issue 3 - Sep 1995
Volume 11, Issue 2 - Jun 1995
Volume 11, Issue 1 - Mar 1995
Volume 11, Issue E - 00 1995
Selecting the target year
Review of air pollution modeling in Korea
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 1~14
On the Development of Local Air Pollution Dispersion Models for Application to Korea
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 15~28
Over the last two decades, air quality models have been developed and used in the United States. Many of these models ate distributed as parts of UNAMAP. These models have been used as useful tools for urban air quality management in Korea. However, when we use these models, many problems could be occured because of their different topographical and meteorological conditions. In the present study it is described that the characteristics about developement of the local scale diffusion models for application to Korea. Also for evaluation purpose of the models, input data requirements such as air pollutant concentrations, emission inventory, meteorological data, and field experiment data, were discussed.
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 29~36
Concentration of Particulate Nitrate Classified by Formation Mechanism in Seoul Ambient Air
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 37~44
Concentration of particulate nitrate classified by formation mechanism and particle diameter in ambient air was determined from Feb. to Oct. 1993. Sampling was carried out using a two-stage Andersen air sampler at the top of a five-story building located at Kon-Kuk University in seoul. Concentration of N
in TSP was measured by pyrolysis of sample filters at 160.deg.C for 1hr. concentration of N
was higher in winter time compared with that in summmer time. Also, concentration of N
was higher in fine particles compared with that in coarse particle. The range of N
concentration was between 2.9 and 9.9.mu.g/
. Weight fraction of N
in total particulate nitrate was 31.1 .sim. 59.5%, and weight fraction of N
in TSP was 2.1 .sim. 11.2%. Concentration of NaN
, which originated from sea salt, was highest in spring time and lowest in summer time,and the concentration range was between 0.1 and 0.7.mu.g/
/TSP ratio was very low (0.1 .sim. 0.4%) indicating that the portion of NaN
in TSP was negligible. Concentration of particulate nitrate originated from soil was 2.4 .sim. 2.9.mu.g/
. Weight fraction of that in total particulate nitrate was 14.0 .sim. 37.1%.
On Characteristics of Surface Ozone Concentration and Important Meteorological Parameters in Pusan, Korea
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 45~56
We considered that characteristics of surface ozone continuous and important meteorological parameters from the data measured 7 air quality continuous monitoring stations during 2 years (1990, 1993) in pusan. The diurnal ozone variation showed a primary peak near 1500LST and a secondary peak of the DP(double peaked) pattern. The episode day was defined when an ozone peak higher than 60 ppb was observed at least one station. The frequency of episode day was 100 (298 hours, 69 days). The frequency of the episode day was higher at Meongryundong and Daeyeondong than other sites and highest in August under control of pacific subtropical high. The high temporatant meteorological parameters accompanying the high episode days. The favorable synoptic environment accompanying ozone episode was distributed to 7 different pattern. These pattern can be taken as a nesessary but not an absolute indicator for predicting the occerrence of an episode.
A Study on the Assessment of Pollution Level of Precipitation at Kangwha, 1992
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 57~68
Precipitation samples were collected by a wet-only automatic acid precipitation sampler at Kangwha island on the western coast in Korea, through January until December 1992. pH, electric conductivity and the concentrations of major water-soluble ion components such as N
were measured. From the result of checking the validity for assesment of pollution level of precipitation samples by pH using correlation analysis between pH and major components, and t-test of chemical composition between acid rain and non-acid rain, pH proved to be not satisfactory for its pillution level. A more comprehensive method is therefore required. In order to estimate the monthly analytical result of chemical composition of precipitation samples comprehensively, a cluster analysis was used among the various multivariate statistical analysis. As a result of making a cluster analysis for separating the monthly precipitation samples into homogeneous patterns by setting the concentrations of nine major water-soluble ion components as a variable, three homogeneous patterns were obtained. The first pattern was a group of months having average ion concentrations, the second a guoup of months having low ion concentration, and the third a group of months having high ion concentrations. Thus, it was indicated that the pollution level of precipitation was higher on February and lower on May, June, August and September than the other months. As a result, this analysis method could be estimated the chemical coposition of precipitation regionally as well as monthly.monthly.
Estimation of water content and strong acideity of ambient particles in Seoul
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 69~76
Water content and strong acidity are estimated for ambient particles measured between Fall, 1991 and Summer, 1992 in Seoul using a gas/aerosol equilibrium model, called SCAPE. Particle water content and formation of solid species are closely related to ambient relative humidity and ionic concentrations. Generally, water content of particles is high during the night and summer. Estimated particle strong acidity level of Seoul is similar to that of Los Angeles, U.S.A. Acidity of wet and dry depositions in Seoul is discussed.
Characteristics of Heteropoly Acid Catalyst for Emission Gas Control in Methanol Fueled Vehicles
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 77~84
To prevent or reduce air pollutant from methanol fueled vehicles, methanol oxidation reaction was carried out using a heteropoly acid catalysts. Catalytic activities of catalysts have been experimented at atmospheric pressure in a fixed bed flow reactor. Catalysts were characterized by XRD, IR, thermal analysis, N
-TPD and GC pulse technique. Acidities of catalysts were highly affected by poly-atoms. Methanol conversion was much higher on catalyst with W than on catalyst with Mo as a poly-atoms. With the increase of copper content(X) in C
PMo catalyst, acidity was decreased and oxidation ability was increased. Methanol conversion and product distribution were affected by the acidity and oxidation ability of catalyst. Especially, supported PdSiW(1wt%) catalyst has a very good methanol conversion and C
selectivity as high as a commertial 3-way catalyst.t.
Measutements of the ground-level ozone in a rural area of Chongwon, Korea
Journal of Korean Society for Atmospheric Environment, volume 11, issue 1, 1995, Pages 85~93
Measurements of ground level ozone concentrations were made in a rural area of Chongwon (Choongbook Province) from June 1993 to July 1994. High values frequently exceeding 100 ppb (ambient air qualyty standard of Korea) were recorded. High ozone concentrations in the boundary layer were primarily correlated with the several meteorological parameters in warm seasons: pressure, radiation, temperature, precipitation and wind velocity. The annual average concentration of ozone at Chongwon was 17ppb, and this value was relatively higher than those for other cities in Korea. O
3/ concentrations were observed to increase when the ridge of a surface anticyclone was passing over the region, and maximum values(.geq.100 ppb) were observed on the rear sides of high pressure centers and in the warm sectors of cyclones(well head of cold fronts). The ozone concentrations had a negative correlation with the concentration of primary pollutants(e.g., total hydrocarbons).