globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD027341
Scopus记录号: 2-s2.0-85043399077
论文题名:
Impact of Biomass Burning Plumes on Photolysis Rates and Ozone Formation at the Mount Bachelor Observatory
作者: Baylon P.; Jaffe D.A.; Hall S.R.; Ullmann K.; Alvarado M.J.; Lefer B.L.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:4
起始页码: 2272
结束页码: 2284
语种: 英语
英文关键词: aerosols ; biomass burning ; brown carbon ; mountaintop site ; ozone ; photolysis rates
英文摘要: In this paper, we examine biomass burning (BB) events at the Mt. Bachelor Observatory (MBO) during the summer of 2015. We explored the photochemical environment in these BB plumes, which remains poorly understood. Because we are interested in understanding the effect of aerosols only (as opposed to the combined effect of aerosols and clouds), we carefully selected three cloud-free days in August and investigate the photochemistry in these plumes. At local midday (solar zenith angle (SZA) = 35°), j(NO2) values were slightly higher (0.2–1.8%) in the smoky days compared to the smoke-free day, presumably due to enhanced scattering by the smoke aerosols. At higher SZA (70°), BB aerosols decrease j(NO2) by 14–21%. We also observe a greater decrease in the actinic flux at 310–350 nm, compared to 360–420 nm, presumably due to absorption in the UV by brown carbon. We compare our measurements with results from the Tropospheric Ultraviolet-Visible v.5.2 model. As expected, we find a good agreement (to within 6%) during cloud-free conditions. Finally, we use the extended Leighton relationship and a photochemical model (Aerosol Simulation Program v.2.1) to estimate midday HO2 and RO2 concentrations and ozone production rates (P(O3)) in the fire plumes. We observe that Leighton-derived HO2 and RO2 values (49–185 pptv) and instantaneous P(O3) (2.0–3.6 ppbv/h) are higher than the results from the photochemical model. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114448
Appears in Collections:气候减缓与适应

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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; School of Science, Technology, Engineering and Mathematics, University of Washington Bothell, Bothell, WA, United States; Atmospheric Chemistry Observations and Measurements Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; Atmospheric and Environmental Research, Lexington, MA, United States; NASA Earth Science Division, Washington, DC, United States

Recommended Citation:
Baylon P.,Jaffe D.A.,Hall S.R.,et al. Impact of Biomass Burning Plumes on Photolysis Rates and Ozone Formation at the Mount Bachelor Observatory[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(4)
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