Ice core measurements of 14CH4 constrain the sources of atmospheric methane increase during abrupt warming events of the last deglaciation

• Main Authors: Petrenko, VV, Severinghaus, JP, Smith, AM, Riedel, K, Brook, EJ, Schaefer, H, Baggenstos, D, Harth, CM, Hua, Q, Dyonisius, M, Buizert, C, Schilt, A, Faïn, X, Mitchell, L, Bauska, TK, Orsi, A, Weiss, RF
• Format: Conference Object
• Language: English
• Published: ADS 2020
• Subjects: Environmental Transport; Atmospheric Chemistry; Biosphere; Troposphere; Gases; Drill Cores; Arctic; Greenland; Taylor Glacier; Antarc*; Antarctica; glacier; Ice; ice core; Methane hydrate; permafrost
• Online Access: http://apo.ansto.gov.au/dspace/handle/10238/9457; https://agu.confex.com/agu/fm15/meetingapp.cgi/Paper/75126

Thawing permafrost and marine methane hydrate destabilization in the Arctic and elsewhere have been proposed as large sources of methane to the atmosphere in the future warming world. To evaluate this hypothesis it is useful to ask whether such methane releases happened during past warming events. T...