Studies of high-ozone episodes in the greater Seoul area
To investigate the characteristics of high-ozone occurrences in the Greater Seoul Area (GSA), three high-ozone episodes were selected, for which the ozone warning for concentrations above 120 ppb might be issued. The selection was based on morning-average wind directions and speeds, and daily-maximum ozone concentrations measured between 1990 and 1997. The episodes meeting the selection criteria were seven days in July 1992, nine days in July 1994, and three days in August 1994, as respectively characterized by southwesterly, easterly, and calm winds in the morning. However, more than 80% of high-ozone days in the GSA were associated with calm winds and the concomitant accumulation of local emissions in the morning, rather than being due to transport of ozone and/or its precursors. This is believed to be the primary reason why ozone concentrations in the GSA varied in a completely different manner, even between adjacent monitoring stations.
- Research Organization:
- Korea Inst. of Science and Technology, Seoul (KR)
- OSTI ID:
- 20002111
- Report Number(s):
- CONF-990608--
- Country of Publication:
- United States
- Language:
- English
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