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Chemosphere

Title:		Demonstration of long-term increases in tropospheric O3 levels: causes and potential impacts
Author(s):		Susaya J; Kim KH; Shon ZH; Brown RJ;
Address:		"Department of Environment & Energy, Sejong University, Seoul 143-747, Republic of Korea"
Journal Title:		Chemosphere
Year:		2013
Volume:		20130605
Issue:		11
Page Number:		1520 - 1528
DOI:		10.1016/j.chemosphere.2013.04.017
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Ground-level ozone (O3) is a well-known atmospheric pollutant with its adverse impacts on the environment and human health. Here, the tropospheric O3 concentrations monitored in seven major cities in Korea at monthly intervals over a 22-year period (1989-2010) are presented, and their long-term variability examined. The analysis of annual mean values of O3 (in nmolmol(-1), or ppb) showed a noticeable increase of 118+/-69% in all seven cities over the two decades (p<0.01). Changes in O3 levels are closely associated with both environmental (e.g., NOx (NO+NO2), SO2, CO, and total suspended particles (TSPs) (p<0.01), temperature, and sunshine hours) and common anthropogenic variables (e.g., population density and number of vehicles). Evidence collected in this study suggests that the atmospheric conditions in most major cities of Korea should be volatile organic compounds (VOCs) sensitive or NOx saturated with respect to O3 formation. As such, establishment of a proper management strategy seems a sensible approach to control tropospheric ozone concentrations in densely populated cities"
Keywords:		Air/analysis Cities Ozone/*analysis Seasons Time Factors Korea Long-term trend NOx Tropospheric ozone Voc;
Notes:		"MedlineSusaya, Janice Kim, Ki-Hyun Shon, Zang-Ho Brown, Richard J C eng Research Support, Non-U.S. Gov't England 2013/06/13 Chemosphere. 2013 Sep; 92(11):1520-8. doi: 10.1016/j.chemosphere.2013.04.017. Epub 2013 Jun 5"