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Rights Statements InC/1.0 , Open Access
Journal article
Patterns of atmospheric nitrogen dioxide in Kelowna, British Columbia
Northwest science., Vol.71(4), pp.330-339
1997
Handle:
https://hdl.handle.net/2376/1227
Abstract
Prior to 1994, atmospheric monitoring in the central Okanagan Valley region of British Columbia (BC) was restricted to ozone analysis and sporadic determinations of total suspended particulates, and dust. In May 1994, a BC Government air monitoring station measuring PM10, CO, NOx, O30, and SO2 was installed in the city of Kelowna. To complement the data obtained at this fixed location this study measured the spatial distribution of nitrogen dioxide gas at various locations throughout Kelowna. Twelve sites were chosen for a twelve month monitoring program (June 1994 to May 1995). Sampling, over 7 to 10 day periods, was carried out using Palmes passive diffusion tubes; analysis of the trapped NO2 was determined spectrophotometrically. Estimates of mean accuracy (-4 %), and precision (standard deviation +- 8%), were determined by comparing diffusion tube data with that obtained by the monitoring station. Average daily NO, concentrations varied from 8 to 79 mug/m3. High concentrations of NO2 were measured in late July 1994 coincident with a nearby large forest fire. The highest overall values were obtained adjacent to Highway 97, the main traffic route, during a period of stagnant air conditions in late November and early December 1994. Average annual mean values ranged from 21 mug/m3 to 50 mug/m3, well within the Canadian and US (NAAQS) air quality objectives. The data obtained in this study provides a suitable base from which future comparisons of NO2 levels, and air quality trends, may be assessed
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Details
- Title
- Patterns of atmospheric nitrogen dioxide in Kelowna, British Columbia
- Creators
- Graham R. Bruce (Author)Tracy A. Gow (Author)
- Publication Details
- Northwest science., Vol.71(4), pp.330-339
- Academic Unit
- Northwest Science
- Publisher
- WSU Press
- Identifiers
- 99900502133801842
- Copyright
- In copyright ; openAccess ; http://rightsstatements.org/vocab/InC/1.0/ ; http://purl.org/eprint/accessRights/OpenAccess
- Language
- English
- Resource Type
- Journal article