Ice core measurements of 14CH4 show no evidence of methane release to atmosphere from methane hydrates during a large warming event 11,600 years ago

• Main Authors: Petrenko, VV, Severinghaus, JP, Smith, AM, Riedel, K, Brook, EJ, Schaefer, H, Baggenstos, D, Harth, CM, Hua, Q, Buizert, C, Schift, A, Fain, X, Mitchell, L, Bauska, TK, Orsi, A, Weiss, RF
• Format: Conference Object
• Language: English
• Published: Antarctic Climate and Ecosystems Cooperative Research Centre 2020
• Subjects: Pleistocene epoch; Glaciers; Greenhouse gases; Paleocclimatology; Climatic change; Antarticia; Greenland; Methane; Taylor Glacier; Antarc*; Antarctica; antartic*; glacier; Ice; ice core; Methane hydrate; permafrost
• Online Access: http://apo.ansto.gov.au/dspace/handle/10238/9501; https://static1.squarespace.com/static/5459b25de4b00ee921cd006d/t/56dce081c2ea51eadac2f4e1/1457315995517/IPICS+2016+-+Abstracts.pdf

Thawing permafrost and marine methane hydrate destabilization have been proposed as large sources of methane to the atmosphere in response to both past and future warming. We present measurements of 14C of paleoatmospheric CH4 over the Younger Dryas – Preboreal (YD – PB) abrupt warming event (≈11,60...