Evaluating methane inventories by isotopic analysis in the London region

Abstract A thorough understanding of methane sources is necessary to accomplish methane reduction targets. Urban environments, where a large variety of methane sources coexist, are one of the most complex areas to investigate. Methane sources are characterised by specific δ13C-CH4 signatures, so hig...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	G. Zazzeri, D. Lowry, R. E. Fisher, J. L. France, M. Lanoisellé, C. S. B. Grimmond, E. G. Nisbet
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/60d120ee81bc47dc966f5324ac2223a7
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:60d120ee81bc47dc966f5324ac2223a7
record_format	dspace
spelling	oai:doaj.org-article:60d120ee81bc47dc966f5324ac2223a72021-12-02T11:52:39ZEvaluating methane inventories by isotopic analysis in the London region10.1038/s41598-017-04802-62045-2322https://doaj.org/article/60d120ee81bc47dc966f5324ac2223a72017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04802-6https://doaj.org/toc/2045-2322Abstract A thorough understanding of methane sources is necessary to accomplish methane reduction targets. Urban environments, where a large variety of methane sources coexist, are one of the most complex areas to investigate. Methane sources are characterised by specific δ13C-CH4 signatures, so high precision stable isotope analysis of atmospheric methane can be used to give a better understanding of urban sources and their partition in a source mix. Diurnal measurements of methane and carbon dioxide mole fraction, and isotopic values at King’s College London, enabled assessment of the isotopic signal of the source mix in central London. Surveys with a mobile measurement system in the London region were also carried out for detection of methane plumes at near ground level, in order to evaluate the spatial allocation of sources suggested by the inventories. The measured isotopic signal in central London (−45.7 ±0.5‰) was more than 2‰ higher than the isotopic value calculated using emission inventories and updated δ13C-CH4 signatures. Besides, during the mobile surveys, many gas leaks were identified that are not included in the inventories. This suggests that a revision of the source distribution given by the emission inventories is needed.G. ZazzeriD. LowryR. E. FisherJ. L. FranceM. LanoiselléC. S. B. GrimmondE. G. NisbetNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q G. Zazzeri D. Lowry R. E. Fisher J. L. France M. Lanoisellé C. S. B. Grimmond E. G. Nisbet Evaluating methane inventories by isotopic analysis in the London region
description	Abstract A thorough understanding of methane sources is necessary to accomplish methane reduction targets. Urban environments, where a large variety of methane sources coexist, are one of the most complex areas to investigate. Methane sources are characterised by specific δ13C-CH4 signatures, so high precision stable isotope analysis of atmospheric methane can be used to give a better understanding of urban sources and their partition in a source mix. Diurnal measurements of methane and carbon dioxide mole fraction, and isotopic values at King’s College London, enabled assessment of the isotopic signal of the source mix in central London. Surveys with a mobile measurement system in the London region were also carried out for detection of methane plumes at near ground level, in order to evaluate the spatial allocation of sources suggested by the inventories. The measured isotopic signal in central London (−45.7 ±0.5‰) was more than 2‰ higher than the isotopic value calculated using emission inventories and updated δ13C-CH4 signatures. Besides, during the mobile surveys, many gas leaks were identified that are not included in the inventories. This suggests that a revision of the source distribution given by the emission inventories is needed.
format	article
author	G. Zazzeri D. Lowry R. E. Fisher J. L. France M. Lanoisellé C. S. B. Grimmond E. G. Nisbet
author_facet	G. Zazzeri D. Lowry R. E. Fisher J. L. France M. Lanoisellé C. S. B. Grimmond E. G. Nisbet
author_sort	G. Zazzeri
title	Evaluating methane inventories by isotopic analysis in the London region
title_short	Evaluating methane inventories by isotopic analysis in the London region
title_full	Evaluating methane inventories by isotopic analysis in the London region
title_fullStr	Evaluating methane inventories by isotopic analysis in the London region
title_full_unstemmed	Evaluating methane inventories by isotopic analysis in the London region
title_sort	evaluating methane inventories by isotopic analysis in the london region
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/60d120ee81bc47dc966f5324ac2223a7
work_keys_str_mv	AT gzazzeri evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT dlowry evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT refisher evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT jlfrance evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT mlanoiselle evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT csbgrimmond evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion AT egnisbet evaluatingmethaneinventoriesbyisotopicanalysisinthelondonregion
_version_	1718394988218286080

Evaluating methane inventories by isotopic analysis in the London region

Ejemplares similares