ozone production from the interaction of wildfire and biogenic emissions: a case study in russia during spring 2006
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2012
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Abstract
The objective of this study is to investigate the contribution of biomass burning emissions to O<sub>3</sub> production during small-scale dry-grass fires over Western Russia (24 April–10 May 2006) as well as to quantify the effect of biogenic emissions in this environment. By using the Factor Separation methodology, we evaluate the pure contribution of each one of these two sources and we appoint the significance of their synergistic effect on O<sub>3</sub> production. The total (actual) contribution of each source is also estimated. Sensitivity simulations assess the effect of various fire emission parameters, such as chemical composition, emissions magnitude and injection height. The model results are compared with O<sub>3</sub> and isoprene observations from 117 and 9 stations of the EMEP network, respectively. <br><br> Model computations show that the fire episode determines the sensitivity of O<sub>3</sub> chemistry in the area. The reference run which represents grass fires with high NO<sub>x</sub>/CO emission ratio (0.06) is characterized by VOC-sensitive O<sub>3</sub> production. In that case, the pure impact of fire emissions on surface O<sub>3</sub> is up to 40–45 ppb, while their synergistic effect with the biogenic emissions is proven significant (up to 8 ppb). Under a lower NO<sub>x</sub>/CO molar ratio (0.025, representative of agricultural residues), the area is characterized by NO<sub>x</sub>-sensitive chemistry and the maximum surface O<sub>3</sub> predictions are almost doubled due to higher O<sub>3</sub> production at the fire spots and lower fires' NO emissions.
| Reference Key |
bossioli2012atmosphericozone
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|---|---|
| Authors | ;E. Bossioli;M. Tombrou;A. Karali;A. Dandou;D. Paronis;M. Sofiev |
| Journal | Journal of agricultural and food chemistry |
| Year | 2012 |
| DOI |
10.5194/acp-12-7931-2012
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