气候变化领域集成服务门户(CCPortal): Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires

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DOI	10.1038/s41561-020-0637-7
	Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires
	Theys N.; Volkamer R.; Müller J.-F.; Zarzana K.J.; Kille N.; Clarisse L.; De Smedt I.; Lerot C.; Finkenzeller H.; Hendrick F.; Koenig T.K.; Lee C.F.; Knote C.; Yu H.; Van Roozendael M.
发表日期	2020
ISSN	17520894
起始页码	681
结束页码	686
卷号	13 期号:10
英文摘要	Nitrous acid (HONO) is a precursor of the hydroxyl radical in the atmosphere, which controls the degradation of greenhouse gases, contributes to photochemical smog and ozone production, and influences air quality. Although biomass burning is known to contribute substantially to global aerosols and reactive gas emissions, pyrogenic contributions to HONO emissions are poorly constrained and often omitted in models. Here we present a global survey of TROPOMI/Sentinel-5 Precursor satellite sounder observations and show that HONO emissions are consistently enhanced in fresh wildfire plumes. Comparing major ecosystems (savanna, grassland, shrubland and tropical and extratropical forests), we found that the enhancement ratios of HONO to nitrogen dioxide varied systematically with biome type, with the lowest in savannas and grasslands and highest in extratropical evergreen forests. Supported by airborne measurements, we demonstrate that previous assessments underestimate pyrogenic HONO emissions by a factor of 2–4 across all ecosystem types. We estimate that HONO emissions are responsible for two-thirds of the hydroxyl radical production in fresh wildfire plumes worldwide and act to accelerate oxidative plume chemistry and ozone production. Our findings suggest that pyrogenic HONO emissions have a substantial impact on atmospheric composition, which enhances regional ozone levels by up to 7 ppbv. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	air quality; biomass burning; biome; evergreen forest; greenhouse gas; oxidant; terrestrial ecosystem; wildfire
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206838
作者单位	Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium; Department of Chemistry, University of Colorado Boulder, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, CO, United States; Department of Atmospheric Sciences, University of Colorado Boulder, Boulder, CO, United States; Université libre de Bruxelles (ULB), Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), C. P. 160/09, Brussels, Belgium; Meteorological Institute, LMU Munich, Munich, Germany
推荐引用方式 GB/T 7714	Theys N.,Volkamer R.,Müller J.-F.,et al. Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires[J],2020,13(10).
APA	Theys N..,Volkamer R..,Müller J.-F..,Zarzana K.J..,Kille N..,...&Van Roozendael M..(2020).Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires.Nature Geoscience,13(10).
MLA	Theys N.,et al."Global nitrous acid emissions and levels of regional oxidants enhanced by wildfires".Nature Geoscience 13.10(2020).