气候变化领域集成服务门户(CCPortal): Anthropogenic methane plume detection from point sources in the Paris megacity area and characterization of their δ13C signature

CCPortal

DOI	10.1016/j.atmosenv.2019.117055
	Anthropogenic methane plume detection from point sources in the Paris megacity area and characterization of their δ13C signature
	Xueref-Remy I.; Zazzeri G.; Bréon F.M.; Vogel F.; Ciais P.; Lowry D.; Nisbet E.G.
发表日期	2020
ISSN	1352-2310
卷号	222
英文摘要	Mitigating anthropogenic methane emissions is one of the available tools for reaching the near term objectives of the Paris Agreement. Characterizing the isotopic signature of the methane plumes emitted by these sources is needed to improve the quantification of methane sources at the regional scale. Urbanized and industrialized regions such as the Paris megacity are key places to better characterize anthropogenic methane sources. In this study, we present the results of the first mobile surveys in the Paris region, assessing methane point sources from 10 landfills (which in the regional inventory are the main emission sector of methane in the region), 5 gas storage sites (supplying Paris) and 1 waste water treatment (WWT) facility (Europe's largest, second worldwide). Local atmospheric methane concentration (or mixing ratio) enhancements in the source plumes were quantified and their δ13C in CH4 (further noted δ13CH4) signature characterized. Among the 10 landfills sampled, at 6 of them we detected atmospheric methane local enhancements ranging from 0.8 to 8.5 parts per million (ppm) with δ13CH4 signatures between −63.7 ± 0.3 permils (‰) to −58.2 ± 0.3‰. Among the 5 gas storage sites surveyed, we could observe that 3 of them were leaking methane with local methane concentration enhancements ranging from 0.8 to 8.1 ppm and δ13CH4 signatures spanning from −43.4 ± 0.5‰ to −33.8 ± 0.4‰. Dutch gas with a δ13CH4 signature of −33.8 ± 0.4‰ (typical of thermogenic gas) was also likely identified. The WWT site emitted local methane enhancements up to 4.0 ppm. For this site, two δ13CH4 signatures were determined as −51.9 ± 0.2‰ and −55.3 ± 0.1‰, typical of a biogenic origin. About forty methane plumes were also detected in the Paris city, leading to local concentration enhancements whose origin was in two cases interpreted as natural gas leaks thanks to their isotopic composition. However, such enhancements were much less common than in cities of North America. More isotopic surveys are needed to discriminate whether such urban methane enhancements are outcoming from gas line leaks and sewer network emanations. Furthermore, our results lead us to the conclusion that the regional emissions inventory could underestimate methane emissions from the WWT sector. Further campaigns are needed to assess the variability and seasonality of the sources and of their isotopic signature, and to estimate their emissions using methods independent of the inventory. © 2019
关键词	Isotopes Methane sources Mobile campaigns Paris
语种	英语
scopus关键词	Atmospheric chemistry; Gases; Isotopes; Land fill; Methanation; Surveys; Waste treatment; Wastewater treatment; Water treatment; Atmospheric methanes; Emissions inventory; Isotopic composition; Isotopic signatures; Methane concentrations; Mobile campaigns; Paris; Parts per millions; Methane; carbon 13; methane; natural gas; anthropogenic effect; carbon isotope; concentration (composition); emission; emission inventory; gas storage; landfill; megacity; methane; natural gas; pollutant source; seasonality; sewer network; water treatment; atmosphere; cavity ring down spectroscopy; concentration (parameter); France; gas chromatography; geography; greenhouse gas; isotope analysis; landfill; mass; mass spectrometry; North America; oil industry; plume; priority journal; seasonal variation; sewer; waste water management; Europe; France; Ile de France; North America; Paris; Ville de Paris
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/249453
作者单位	Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Gif-sur-Yvette, France; Royal Holloway, University of London (RHUL), United Kingdom
推荐引用方式 GB/T 7714	Xueref-Remy I.,Zazzeri G.,Bréon F.M.,et al. Anthropogenic methane plume detection from point sources in the Paris megacity area and characterization of their δ13C signature[J],2020,222.
APA	Xueref-Remy I..,Zazzeri G..,Bréon F.M..,Vogel F..,Ciais P..,...&Nisbet E.G..(2020).Anthropogenic methane plume detection from point sources in the Paris megacity area and characterization of their δ13C signature.ATMOSPHERIC ENVIRONMENT,222.
MLA	Xueref-Remy I.,et al."Anthropogenic methane plume detection from point sources in the Paris megacity area and characterization of their δ13C signature".ATMOSPHERIC ENVIRONMENT 222(2020).