Old carbon reservoirs were not important in the deglacial methane budget

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dc.contributor.authorDyonisius, MNen_AU
dc.contributor.authorPetrenko, VVen_AU
dc.contributor.authorSmith, AMen_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorYang, Ben_AU
dc.contributor.authorSchmitt, Jen_AU
dc.contributor.authorBeck, Jen_AU
dc.contributor.authorSeth, Ben_AU
dc.contributor.authorBock, Men_AU
dc.contributor.authorHmiel, Ben_AU
dc.contributor.authorVimont, Ien_AU
dc.contributor.authorMenking, JAen_AU
dc.contributor.authorShackleton, SAen_AU
dc.contributor.authorBaggenstos, Den_AU
dc.contributor.authorBauska, TKen_AU
dc.contributor.authorRhodes, RHen_AU
dc.contributor.authorSperlich, Pen_AU
dc.contributor.authorBeaudette, Ren_AU
dc.contributor.authorHarth, CMen_AU
dc.contributor.authorKalk, Men_AU
dc.contributor.authorBrook, EJen_AU
dc.contributor.authorFischer, Hen_AU
dc.contributor.authorSeveringhaus, JPen_AU
dc.contributor.authorWeiss, RFen_AU
dc.date.accessioned2021-07-08T04:02:27Zen_AU
dc.date.available2021-07-08T04:02:27Zen_AU
dc.date.issued2020-02-21en_AU
dc.date.statistics2021-07-01en_AU
dc.descriptionCopyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. This is an article distributed under the terms of the Science Journals Default License.en_AU
dc.description.abstractPermafrost and methane hydrates are large, climate-sensitive old carbon reservoirs that have the potential to emit large quantities of methane, a potent greenhouse gas, as the Earth continues to warm. We present ice core isotopic measurements of methane (Δ14C, δ13C, and δD) from the last deglaciation, which is a partial analog for modern warming. Our results show that methane emissions from old carbon reservoirs in response to deglacial warming were small (<19 teragrams of methane per year, 95% confidence interval) and argue against similar methane emissions in response to future warming. Our results also indicate that methane emissions from biomass burning in the pre-Industrial Holocene were 22 to 56 teragrams of methane per year (95% confidence interval), which is comparable to today. Copyright © 2020 The Authorsen_AU
dc.identifier.citationDyonisius, M. N., Petrenko, V. V., Smith, A. M., Hua, Q., Yang, B., Schmitt, J., Beck, J., Seth, B., Bock, M., Hmiel, B., Vimont, I., Menking, J. A., Shackleton, S. A., Baggenstos, D., Bauska, T. K., Rhodes, R. H., Sperlich, P., Beaudette, R., Harth, C. M., Kalk, M., Brook, E. J., Fischer, H., Severinghaus, J. P. & Weiss, R. F. (2020). Old carbon reservoirs were not important in the deglacial methane budget. Science, 367(6480), 907-910. doi:10.1126/science.aax0504en_AU
dc.identifier.issn1095-9203en_AU
dc.identifier.issue6480en_AU
dc.identifier.journaltitleScienceen_AU
dc.identifier.pagination907-910en_AU
dc.identifier.urihttps://doi.org/10.1126/science.aax0504en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11032en_AU
dc.identifier.volume367en_AU
dc.language.isoenen_AU
dc.publisherAAASen_AU
dc.subjectMethaneen_AU
dc.subjectCarbonen_AU
dc.subjectGas hydratesen_AU
dc.subjectPermafrosten_AU
dc.subjectGreenhouse gasesen_AU
dc.subjectEarth atmosphereen_AU
dc.subjectIceen_AU
dc.subjectDrill coresen_AU
dc.subjectQuaternary perioden_AU
dc.titleOld carbon reservoirs were not important in the deglacial methane budgeten_AU
dc.typeJournal Articleen_AU
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