Attribution of ground-level ozone to anthropogenic and natural sources of NO<sub>x</sub> and reactive carbon in a global chemical transport model

doi:10.5194/acp-2020-436

GSTDTAP > 地球科学

DOI	10.5194/acp-2020-436
	Attribution of ground-level ozone to anthropogenic and natural sources of NO_x and reactive carbon in a global chemical transport model
	Tim Butler, Aurelia Lupascu, and Aditya Nalam
	2020-05-20
发表期刊	Atmospheric Chemistry and Physics
出版年	2020
英文摘要	We perform a source attribution for tropospheric and ground-level ozone using a novel technique which accounts separately for the contributions of the two chemically distinct emitted precursors (reactive carbon and oxides of nitrogen) to the chemical production of ozone in the troposphere. By tagging anthropogenic emissions of these precursors according to the geographical region from which they are emitted, we determine source/receptor relationships for ground-level ozone. Our methodology reproduces earlier results obtained through other techniques for ozone source attribution, and also delivers additional information about the modelled processes responsible for intercontinental transport of ozone, which is especially strong during the spring months. The current generation of chemical transport models used to support international negotiations aimed at reducing the intercontinental transport of ozone show especially strong inter-model differences in simulated springtime ozone. Current models also simulate a large range of different responses of surface ozone to methane, one of the major precursors of ground-level ozone. Using our novel source attribution technique, we show that emissions of NO_x from international shipping over the high seas play a disproportionately strong role in our model system to the hemispheric-scale response of surface ozone to changes in methane, as well as to the springtime maximum in intercontinental transport of ozone and its precursors. We recommend a renewed focus on improvement of the representation of the chemistry of ship NO_x emissions in current-generation models. We demonstrate the utility of ozone source attribution as a powerful model diagnostic tool, and recommend that similar source attribution techniques become a standard part of future model inter-comparison studies.
领域	地球科学
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/270383
专题	地球科学
推荐引用方式 GB/T 7714	Tim Butler, Aurelia Lupascu, and Aditya Nalam. Attribution of ground-level ozone to anthropogenic and natural sources of NO_x and reactive carbon in a global chemical transport model[J]. Atmospheric Chemistry and Physics,2020.
APA	Tim Butler, Aurelia Lupascu, and Aditya Nalam.(2020).Attribution of ground-level ozone to anthropogenic and natural sources of NO_x and reactive carbon in a global chemical transport model.Atmospheric Chemistry and Physics.
MLA	Tim Butler, Aurelia Lupascu, and Aditya Nalam."Attribution of ground-level ozone to anthropogenic and natural sources of NO_x and reactive carbon in a global chemical transport model".Atmospheric Chemistry and Physics (2020).