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Estimating contribution of wildland fires to ambient ozone levels in National Parks in the Sierra Nevada, CaliforniaAuthor(s): Haiganoush K. Preisler; Shiyuan (Sharon) Zhong; Annie Esperanza; Timothy J. Brown; Andrzej Bytnerowicz; Leland Tarnay
Source: Environmental Pollution 158(3): 778-787
Publication Series: Scientific Journal (JRNL)
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DescriptionData from four continuous ozone and weather monitoring sites operated by the National Park Service in Sierra Nevada, California, are used to develop an ozone forecasting model and to estimate the contribution of wildland fires on ambient ozone levels. The analyses of weather and ozone data pointed to the transport of ozone precursors from the Central Valley as an important source of pollution in these National Parks. Comparisons of forecasted and observed values demonstrated that accurate forecasts of next-day hourly ozone levels may be achieved by using a time series model with historic averages, expected local weather and modeled PM values as explanatory variables. Results on fire smoke influence indicated occurrence of significant increases in average ozone levels with increasing fire activity. The overall effect on diurnal ozone values, however, was small when compared with the amount of variability attributed to sources other than fire.
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CitationPreisler,Haiganoush K.; Zhong, Shiyuan (Sharon); Esperanza, Annie; Brown, Timothy J.; Bytnerowicz, Andrzej; Tarnay, Leland. 2010. Estimating contribution of wildland fires to ambient ozone levels in National Parks in the Sierra Nevada, California. Environmental Pollution 158(3): 778-787
KeywordsBlueSky, California air-quality standard, Next-day ozone forecasts, Air pollution, Fire smoke, Regression models, Spline functions, Time series
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