Journal
CHEMOSPHERE
Volume 92, Issue 11, Pages 1520-1528Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.04.017
Keywords
Tropospheric ozone; Long-term trend; VOC; NOx; Korea
Categories
Funding
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology (MEST) [2010-0007876]
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government Ministry of Knowledge Economy [20100092]
- Korea Institute of Marine Science & Technology Promotion (KIMST) [20100092] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Ground-level ozone (O-3) is a well-known atmospheric pollutant with its adverse impacts on the environment and human health. Here, the tropospheric O-3 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 O-3 (in nmol mol(-1), or ppb) showed a noticeable increase of 118 69% in all seven cities over the two decades (p < 0.01). Changes in O-3 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 O-3 formation. As such, establishment of a proper management strategy seems a sensible approach to control tropospheric ozone concentrations in densely populated cities. (C) 2013 Elsevier Ltd. All rights reserved.
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