The role of wind velocity and mixing depth in the distribution of urban air pollution hazard in Calgary, Alberta, Canada
✍ Scribed by Lawrence C. Nkemdirim
- Publisher
- Springer Netherlands
- Year
- 1984
- Tongue
- English
- Weight
- 325 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0343-2521
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✦ Synopsis
Data on CO, wind velocity and mixing depths collected over a five-year period show a definite association between higher levels of air pollution and SW winds in Calgary (pop. 610,000), a city 110km E of the Canadian Rockies. The phenomenon most pronounced at wind speeds lower than 3m sec -1 is present during winds of up to 10 m sec -1. The shallow mixing depth associated with southwesterlies in this area appears to be a strong factor in the maintenance of the discrepancy. In addition, a climatological assessment of the distribution of mean mixing depths in the city shows that mixed layers are shallowest and least frequent in the S end of the city thereby increasing the potential for air pollution hazard in that part of the city.