气候变化领域集成服务门户(CCPortal): Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5

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DOI	10.5194/acp-21-18195-2021
	Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5
	Thunis P.; Clappier A.; De Meij A.; Pisoni E.; Bessagnet B.; Tarrason L.
发表日期	2021
ISSN	1680-7316
起始页码	18195
结束页码	18212
卷号	21 期号:24
英文摘要	While the burden caused by air pollution in urban areas is well documented, the origin of this pollution and therefore the responsibility of the urban areas in generating this pollution are still a subject of scientific discussion. Source apportionment represents a useful technique to quantify the city's responsibility, but the approaches and applications are not harmonized and therefore not comparable, resulting in confusing and sometimes contradicting interpretations. In this work, we analyse how different source apportionment approaches apply to the urban scale and how their building elements and parameters are defined and set. We discuss in particular the options available in terms of indicator, receptor, source, and methodology. We show that different choices for these options lead to very large differences in terms of outcome. For the 150 large EU cities selected in our study, different choices made for the indicator, the receptor, and the source each lead to an average difference of a factor of 2 in terms of city contribution. We also show that temporal-and spatial-Averaging processes applied to the air quality indicator, especially when diverging source apportionments are aggregated into a single number, lead to the favouring of strategies that target background sources while occulting actions that would be efficient in the city centre. We stress that methodological choices and assumptions most often lead to a systematic and important underestimation of the city's responsibility, with important implications. Indeed, if cities are seen as a minor actor, plans will target the background as a priority at the expense of potentially effective local actions. © Copyright:
语种	英语
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246368
作者单位	Joint Research Centre, European Commission, Ispra, Italy; Laboratoire Image Ville Environnement, Université de Strasbourg, Strasbourg, France; MetClim, Varese, Italy; NILU-Norwegian Institute for Air Research, Kjeller, Norway
推荐引用方式 GB/T 7714	Thunis P.,Clappier A.,De Meij A.,et al. Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5[J],2021,21(24).
APA	Thunis P.,Clappier A.,De Meij A.,Pisoni E.,Bessagnet B.,&Tarrason L..(2021).Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(24).
MLA	Thunis P.,et al."Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.24(2021).