Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6042
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dc.contributor.authorallEtiope, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
dc.date.accessioned2010-06-15T10:32:20Zen
dc.date.available2010-06-15T10:32:20Zen
dc.date.issued2009en
dc.identifier.urihttp://hdl.handle.net/2122/6042en
dc.description.abstractStudies performed since 2000 have demonstrated that geologic emissions of methane are an important global greenhouse-gas source (Etiope, 2004; Kvenvolden and Rogers, 2005; Etiope al, 2008). It is recognised that significant amounts of methane, produced within the Earth crust, released naturally into the atmosphere through faults and fractured rocks. Major emissions are related to hydrocarbon production in sedimentary basins (microbial and thermogenic methane), through continuous exhalation and eruptions from more than 1 200 onshore and offshore mud volcanoes, more than 10 000 onshore and shallow marine seeps and through diffuse soil microseepage. Specifically, six source categories must be considered: mud volcanoes, gas seeps (independent of mud volcanism), microseepage (diffuse exhalation from soil in petroleum basins), submarine seepage, geothermal (non-volcanic) manifestations and volcanoes. Global emission estimates range from 42 to 64 Tg y-1 (mean of 53 Tg y-1), almost 10 % of the total CH4 emission, representing the second most important natural methane source after wetlands. Geo-CH4 sources would also represent the missing source of fossil methane recognised in the recent re-evaluation the fossil methane budget in the atmosphere (about 30 %; Lassey et al,, 2007; Etiope et al, 2008), which implies a total fossil methane emission much higher than that due to fossil fuel industry. The global geo-CH4 emission estimates are of the same level as or higher than other sources or sinks considered in the Intergovernmental Panel on Climate Change (IPCC) tables, such as biomass burning, termites and soil uptake. Recent studies indicate that Earth’s degassing also accounts for at least 17 % and 10 % of total ethane and propane emissions (Etiope and Ciccioli, 2009).en
dc.description.sponsorshipEuropean Environment Agencyen
dc.language.isoEnglishen
dc.relation.ispartofseriesEEA Technical report/9/2009en
dc.subjectMETHANEen
dc.subjectSEEPAGEen
dc.titleEMEP/EEA air pollutant emission inventory guidebook 2009en
dc.title.alternativeTechnical guidance to prepare national emission inventoriesen
dc.typereporten
dc.description.statusPublisheden
dc.type.QualityControlPeer-revieweden
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.02. Carbon cyclingen
dc.subject.INGV03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gasesen
dc.relation.referencesEtiope, G., 2004. ‘GEM — Geologic Emissions of Methane, the missing source in the atmospheric methane budget’, Atmospheric Environment, Vol. 38, No 19, pp. 3099–3100. Etiope, G., 2009. ‘Natural emissions of methane from geological seepage in Europe’, Atmospheric Environment, 43, pp. 1430–1443, doi:10.1016/j.atmosenv.2008.03.014. Etiope, G., Baciu C., Caracausi A., Italiano F., Cosma C., 2004a. ‘Gas flux to the atmosphere from mud volcanoes in eastern Romania’, Terra Nova, 16, pp. 179–184. Etiope, G., Caracausi A., Favara R., Italiano F., Baciu C., 2002. ‘Methane emission from the mud volcanoes of Sicily (Italy)’, Geophysical Research Letters, Vol 29, No 8, 10.1029/2001GL014340. Etiope, G. Ciccioli P, 2009. ‘Earth’s degassing — A missing ethane and propane source’, Science, Vol. 323, No 5913, p. 478, doi: 10.1126/science.1165904. Etiope, G., Feyzullaiev, A., Baciu, C.L., Milkov, A.V., 2004b. ‘Methane emission from mud volcanoes in eastern Azerbaijan’, Geology, Vol. 32, No 6, pp. 465–468. Etiope, G., Feyzullayev, A., Baciu, C.L. 2009. ‘Terrestrial methane seeps and mud volcanoes: a global perspective of gas origin’, Marine and Petroleum Geology, 26, pp. 333–344, doi:10.1016/j.marpetgeo.2008.03.001. Etiope, G., Fridriksson, T., Italiano, F., Winiwarter, W., Theloke, J., 2007. ‘Natural emissions of methane from geothermal and volcanic sources in Europe’, Journal of Volcanology and Geothermal Research, doi:10.1016/j.jvolgeores.2007.04.014.Etiope, G., Klusman, R.W., 2002. ‘Geologic emissions of methane to the atmosphere’, Chemosphere, 49, pp. 777–789. Etiope G., Klusman, R.W., 2009. ‘Microseepage in drylands: flux and implications in the global atmospheric source/sink budget of methane’, Global Planet. Change, in press. Etiope, G., Lassey, K.R., Klusman, R.W., Boschi, E. 2008. ‘Reappraisal of the fossil methane budget and related emission from geologic sources’, Geophysical Research Letters, 35, L09307, doi:10.1029/2008GL033623. Etiope, G., Milkov, A.V., 2004. ‘A new estimate of global methane flux from onshore and shallow submarine mud volcanoes to the atmosphere’, Environmental Geology, 46, pp. 997–1002. Hunt, J.M., 1996. Petroleum geochemistry and geology, W.H. Freeman and Co., New York, p. 743. Judd A.G., Davies J., Wilson J., Holmes R., Baron G. and Bryden I., 1997. ‘Contributions to atmospheric methane by natural seepages on the UK continental shelf’, Marine Geology, 137, pp. 165–189. Judd AG, Hovland M, Dimitrov LI, Garcia Gil S, Jukes V (2002). The geological methane budget at Continental Margins and its influence on climate change’, Geofluids 2, pp. 109–126. Klusman, R.W., Leopold, M.E., LeRoy, M.P., 2000. ‘Seasonal variation in methane fluxes from sedimentary basins to the atmosphere: Results from chamber measurements and modeling of transport from deep sources’, Journal of Geophysical Research, 105D, pp. 24661–24670. Kopf, A.J. 2002. ‘Significance of mud volcanism’, Reviews of Geophysics 40:10.1029/2000RG000093, p. 52. Kvenvolden, K.A., Rogers B.W., 2005. ‘Gaia's breath - global methane exhalations’, Marine and Petroleum Geology, 22, pp. 579–590. Lassey, K.R., Lowe, D.C., Smith, A.M., 2007. ‘The atmospheric cycling of radiomethane and the ‘fossil fraction’ of the methane source’, Atmospheric Chemistry and Physics, 7, pp. 2141–2149.en
dc.description.obiettivoSpecifico4.5. Studi sul degassamento naturale e sui gas petroliferien
dc.description.fulltextopenen
dc.contributor.authorEtiope, G.en
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italiaen
item.openairetypereport-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_93fc-
item.fulltextWith Fulltext-
crisitem.author.deptIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma2, Roma, Italia-
crisitem.author.orcid0000-0001-8614-4221-
crisitem.author.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent03. Hydrosphere-
crisitem.classification.parent03. Hydrosphere-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
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