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Interpretation of ground-level ozone episodes with atmospheric stability index measurement
- Source :
- Environmental science and pollution research international. 19(8)
- Publication Year :
- 2011
-
Abstract
- Purpose This paper presents a novel approach to interpret ground-level O3with the measured atmospheric stability index (ASI). Methods O3 concentrations were monitored by automatic analysers at three types of stations: traffic site, residential site and regional background site in 2005, and the ASI was simultaneously measured by observing radon and its short-lived decay products. Results The observed results showed a clear annual variation of O3 concentrations with a maximum in spring, relatively high at the regional background site over 120 ppb, and lower at the residential and traffic sites at about 70 ppb. ASI gives information about the dilution properties of the lower boundary layer and allows to highlight the relevant role of the dilution factor in determining atmospheric pollution events. We demonstrated the analysis of O3 night peak episodes with vertical wind and ASI. Conclusions With the advantage of ASI and vertical wind profiles, it was possible to isolate particular photochemical pollution phenomena of O3 peaks from the free troposphere reservoir or formed by local reactions. This shows that the index constitutes a powerful and valuable tool for describing O3 night-peak episodes at background station.
- Subjects :
- Air Pollutants
Index (economics)
Meteorology
Ground Level Ozone
Atmosphere
Health, Toxicology and Mutagenesis
chemistry.chemical_element
Radon
General Medicine
Atmospheric sciences
Pollution
Dilution
Troposphere
Boundary layer
Ozone
chemistry
mental disorders
Atmospheric instability
Environmental Chemistry
Environmental science
Annual variation
Seasons
Environmental Monitoring
Subjects
Details
- ISSN :
- 16147499
- Volume :
- 19
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Environmental science and pollution research international
- Accession number :
- edsair.doi.dedup.....3db0b7800823c873dcd439961250851c