A 21st-century shift from fossil-fuel to biogenic methane em
Details of Research
TitleA 21st-century shift from fossil-fuel to biogenic methane emissions indicated by 13CH4AbstractBetween 1999 and 2006, a plateau interrupted the otherwise continuous increase of atmospheric methane concentration [CH4] since preindustrial times. Causes could be sink variability or a temporary reduction in industrial or climate-sensitive sources. We reconstructed the global history of [CH4] and its stable carbon isotopes from ice cores, archived air, and a global network of monitoring stations. A box-model analysis suggests that diminishing thermogenic emissions, probably from the fossil-fuel industry, and/or variations in the hydroxyl CH4 sink caused the [CH4] plateau. Thermogenic emissions did not resume to cause the renewed [CH4] rise after 2006, which contradicts emission inventories. Post-2006 source increases are predominantly biogenic, outside the Arctic, and arguably more consistent with agriculture than wetlands. If so, mitigating CH4 emissions must be balanced with the need for food production.Funding DetailsNIWA, National Institute of Water and Atmospheric Research; UW, University of Washington; HCA, Heidelberg Center for American Studies, University of Heidelberg; Marsden Fund; //aftp.cmdl.noaa.gov/data/trace-gases; CAAC1504, Royal Society of New Zealand; 2014/15 SCI, Royal Society of New Zealand; CH4, Royal Society of New Zealand; http://cdiac.ornl.gov/epubs/db/db1022/db1022.html, UCI, University of California, Irvine; S3, UCI, University of California, Irvine; S4, UCI, University of California, Irvine
Details
1st AuthorSchaefer, H. AuthorSchaefer, H.Fletcher, S.Veidt, C.Lassey, K.Brailsford, G.Bromley, T.Dlugokencky, E.Michel, S.Miller, J.Levin, I.Lowe, D.Martin, R.Vaughn, B.White, J.Year2016JournalScienceVolume352Number6281Pages80-84DOI10.1126/science.aad2705URLhttps://www.scopus.com/inward/recor.....134dd7da3de5688705eeca341PublisherAmerican Association for the Advancement of ScienceKeywordscarboncoalfossil fuelmethanenatural gasozone, atmospheric dynamicsbiogenic emissionconcentration (composition)emission inventoryfossil fuelmethanereconstructionspatiotemporal analysisstable isotope, boundary layercarbon footprintcarbon sourceclimate changeenvironmental changefood industryhumanhuman activitiesnonhumanpriority journalremote sensingReviewthermogenesistropospherewater vaporwetland, Arctic, rank5ProgrammeK085 - Remote sensing and sampling of atmospheric trace gases and greenhouse gases
Other
CitationSchaefer, H., Fletcher, S., Veidt, C., Lassey, K., Brailsford, G., Bromley, T., Dlugokencky, E., Michel, S., Miller, J., Levin, I., Lowe, D., Martin, R., Vaughn, B. and White, J. (2016). A 21st-century shift from fossil-fuel to biogenic methane emissions indicated by 13CH4. Science, 352(6281): 80-84Relevancerank5
White, J., A 21st-century shift from fossil-fuel to biogenic methane em . Antarctica NZ, accessed 07/12/2024, https://adam.antarcticanz.govt.nz/nodes/view/64154, 10.1126/science.aad2705