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Title: Old carbon reservoirs were not important in the deglacial methane budget
Authors: Dyonisius, MN
Petrenko, VV
Smith, AM
Hua, Q
Yang, B
Schmitt, J
Beck, J
Seth, B
Bock, M
Hmiel, B
Vimont, I
Menking, JA
Shackleton, SA
Baggenstos, D
Bauska, TK
Rhodes, RH
Sperlich, P
Beaudette, R
Harth, CM
Kalk, M
Brook, EJ
Fischer, H
Severinghaus, JP
Weiss, RF
Keywords: Methane
Gas hydrates
Greenhouse gases
Earth atmosphere
Drill cores
Quaternary period
Issue Date: 21-Feb-2020
Publisher: AAAS
Citation: Dyonisius, 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.aax0504
Abstract: Permafrost 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 Authors
Description: Copyright © 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.
ISSN: 1095-9203
Appears in Collections:Journal Articles

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