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Anthwal, Ashish,Park, Chan-Goo,Jung, Kweon,Kim, Min-Young,Kim, Ki-Hyun Korean Society for Atmospheric Environment 2010 Asian Journal of Atmospheric Environment (AJAE) Vol.4 No.1
Automobile emissions have caused a major hydrocarbon pollution problem in the ambient air of many cities around the world. This study was conducted to measure the pollution status of volatile organic compounds (VOCs) in some urban residential areas in Seoul, Korea. A total of 20 VOCs (11 aromatic and 9 chlorinated species) were identified at 4 urban residential sites in Seoul, Korea from February 2009 to July 2009. Comparison of total VOC (TVOC) concentration data indicated the dominance of the aromatic species with the maximum (72.2 ppbC) at Jong Ro (JR) and the minimum at Yang Jae (33.4 ppbC). The peak concentration of TVOC occurred during spring at all sites with an exception at Gang Seo (GS), where it was recorded during winter. The distribution of individual VOCs at the study sites was characterized by high toluene concentration. A strong correlation of benzene was also observed with other VOCs and criteria pollutants at all sites (except YJ). The overall results of this study suggest that vehicular emissions have greatly contributed to the increase in VOC pollution at all the study sites.
Ashish Anthwal,S.C Joshi,Archana Sharma,김기현,V. Joshi 한국지구과학회 2009 韓國地球科學會誌 Vol.30 No.5
Measurements of atmospheric CO2 were made in the mountainous region of Srinagar-Garhwal, India (January to December 2006). Concentrations of CO2 averaged 393±4.9 ppm in 2006. Daily variations of CO2 values showed minimum during the daytime (376.2 ppm) and peaked in the morning/evening (410.1 ppm). At monthly intervals, the CO2 values varied from 367±11.14 (May) to 425.2±13.54 ppm (March). If divided on a seasonal basis, the values declined to minimum amounts in post-monsoon (389.9±9.0 ppm) and reached maximums during winter (397.1±11.6 ppm). Although phenology is significant in controlling CO2 levels, short-term changes cannot be explained without the anthropogenic perturbations (e.g., vehicular pollution and forest fires). The CO2 concentrations in Srinagar-Garhwal (393.4 ppm) were generally higher than those of other major monitoring locations around the world.