Ozone formation and the spatial distribution of precursor emissions in Sydney |
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| Affiliation: | 1. Beijing Weather Modification Office, Beijing, China;2. Institute of Urban Meteorology, Chinese Meteorological Administration, Beijing, China;3. Beijing Key Laboratory of Cloud, Precipitation, and Atmospheric Water Resources, Beijing, China;4. Beijing Cloud Laboratory and Observational Utilities Deployment Base, Beijing, China;5. Weather Modification Center, Chinese Meteorological Administration, Beijing, China |
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| Abstract: | Precursor concentration distributions have been reported for Sydney (Post, 1979a) and the implications of these data for ozone control (namely NMHC emission reduction) have been presented elsewhere (Post, 1979a, b). In this analysis, a number of relationships between non-methane hydrocarbon (NMHC) concentration, nitrogen oxides (NOx concentration, NMHC/NOx ratio and the ozone formation potential parameter (NOx × (NMHC) are constructed from the field data. These relationships show that: - 1.(i) NMHC emissions into the Sydney airshed are less uniformly distributed than NOx emissions and generate air parcels with higher than “typical” NMHC/NOx, ratio.
- 2.(ii) Air parcels with higher than “typical” NMHC/NOx ratio are generally those with the worst (highest) ozone formation potential.
Taken together, the relationships suggest that emission control of large undistributed NMHC sources may be more important than control of distributed NMHC sources. |
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