Relevant methane emission to the atmosphere from a geological gas manifestation

Abstract Quantifying natural geological sources of methane (CH4) allows to improve the assessment of anthropogenic emissions to the atmosphere from fossil fuel industries. The global CH4 flux of geological gas is, however, an object of debate. Recent fossil (14C-free) CH4 measurements in preindustri...

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Autores principales:	Adriano Mazzini, Alessandra Sciarra, Giuseppe Etiope, Pankaj Sadavarte, Sander Houweling, Sudhanshu Pandey, Alwi Husein
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c43dd31fc20e4ac58641c3754b01e064
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id	oai:doaj.org-article:c43dd31fc20e4ac58641c3754b01e064
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spelling	oai:doaj.org-article:c43dd31fc20e4ac58641c3754b01e0642021-12-02T12:11:52ZRelevant methane emission to the atmosphere from a geological gas manifestation10.1038/s41598-021-83369-92045-2322https://doaj.org/article/c43dd31fc20e4ac58641c3754b01e0642021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83369-9https://doaj.org/toc/2045-2322Abstract Quantifying natural geological sources of methane (CH4) allows to improve the assessment of anthropogenic emissions to the atmosphere from fossil fuel industries. The global CH4 flux of geological gas is, however, an object of debate. Recent fossil (14C-free) CH4 measurements in preindustrial-era ice cores suggest very low global geological emissions (~ 1.6 Tg year−1), implying a larger fossil fuel industry source. This is however in contrast with previously published bottom-up and top-down geo-emission estimates (~ 45 Tg year−1) and even regional-scale emissions of ~ 1–2 Tg year−1. Here we report on significant geological CH4 emissions from the Lusi hydrothermal system (Indonesia), measured by ground-based and satellite (TROPOMI) techniques. Both techniques indicate a total CH4 output of ~ 0.1 Tg year−1, equivalent to the minimum value of global geo-emission derived by ice core 14CH4 estimates. Our results are consistent with the order of magnitude of the emission factors of large seeps used in global bottom-up estimates, and endorse a substantial contribution from natural Earth’s CH4 degassing. The preindustrial ice core assessments of geological CH4 release may be underestimated and require further study. Satellite measurements can help to test geological CH4 emission factors and explain the gap between the contrasting estimates.Adriano MazziniAlessandra SciarraGiuseppe EtiopePankaj SadavarteSander HouwelingSudhanshu PandeyAlwi HuseinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Adriano Mazzini Alessandra Sciarra Giuseppe Etiope Pankaj Sadavarte Sander Houweling Sudhanshu Pandey Alwi Husein Relevant methane emission to the atmosphere from a geological gas manifestation
description	Abstract Quantifying natural geological sources of methane (CH4) allows to improve the assessment of anthropogenic emissions to the atmosphere from fossil fuel industries. The global CH4 flux of geological gas is, however, an object of debate. Recent fossil (14C-free) CH4 measurements in preindustrial-era ice cores suggest very low global geological emissions (~ 1.6 Tg year−1), implying a larger fossil fuel industry source. This is however in contrast with previously published bottom-up and top-down geo-emission estimates (~ 45 Tg year−1) and even regional-scale emissions of ~ 1–2 Tg year−1. Here we report on significant geological CH4 emissions from the Lusi hydrothermal system (Indonesia), measured by ground-based and satellite (TROPOMI) techniques. Both techniques indicate a total CH4 output of ~ 0.1 Tg year−1, equivalent to the minimum value of global geo-emission derived by ice core 14CH4 estimates. Our results are consistent with the order of magnitude of the emission factors of large seeps used in global bottom-up estimates, and endorse a substantial contribution from natural Earth’s CH4 degassing. The preindustrial ice core assessments of geological CH4 release may be underestimated and require further study. Satellite measurements can help to test geological CH4 emission factors and explain the gap between the contrasting estimates.
format	article
author	Adriano Mazzini Alessandra Sciarra Giuseppe Etiope Pankaj Sadavarte Sander Houweling Sudhanshu Pandey Alwi Husein
author_facet	Adriano Mazzini Alessandra Sciarra Giuseppe Etiope Pankaj Sadavarte Sander Houweling Sudhanshu Pandey Alwi Husein
author_sort	Adriano Mazzini
title	Relevant methane emission to the atmosphere from a geological gas manifestation
title_short	Relevant methane emission to the atmosphere from a geological gas manifestation
title_full	Relevant methane emission to the atmosphere from a geological gas manifestation
title_fullStr	Relevant methane emission to the atmosphere from a geological gas manifestation
title_full_unstemmed	Relevant methane emission to the atmosphere from a geological gas manifestation
title_sort	relevant methane emission to the atmosphere from a geological gas manifestation
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c43dd31fc20e4ac58641c3754b01e064
work_keys_str_mv	AT adrianomazzini relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT alessandrasciarra relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT giuseppeetiope relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT pankajsadavarte relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT sanderhouweling relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT sudhanshupandey relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation AT alwihusein relevantmethaneemissiontotheatmospherefromageologicalgasmanifestation
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Relevant methane emission to the atmosphere from a geological gas manifestation

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