| Literature DB >> 31949074 |
Pincelli M Hull1, André Bornemann2, Donald E Penman3, Michael J Henehan3,4, Richard D Norris5, Paul A Wilson6, Peter Blum7, Laia Alegret8, Sietske J Batenburg9, Paul R Bown10, Timothy J Bralower11, Cecile Cournede12,13, Alexander Deutsch14, Barbara Donner15, Oliver Friedrich16, Sofie Jehle17, Hojung Kim10, Dick Kroon18, Peter C Lippert19, Dominik Loroch14, Iris Moebius16,20, Kazuyoshi Moriya21, Daniel J Peppe22, Gregory E Ravizza23, Ursula Röhl15, Jonathan D Schueth24, Julio Sepúlveda25, Philip F Sexton26, Elizabeth C Sibert5,27,28, Kasia K Śliwińska29, Roger E Summons30, Ellen Thomas3,31, Thomas Westerhold15, Jessica H Whiteside6, Tatsuhiko Yamaguchi32, James C Zachos33.
Abstract
The cause of the end-Cretaceous mass extinction is vigorously debated, owing to the occurrence of a very large bolide impact and flood basalt volcanism near the boundary. Disentangling their relative importance is complicated by uncertainty regarding kill mechanisms and the relative timing of volcanogenic outgassing, impact, and extinction. We used carbon cycle modeling and paleotemperature records to constrain the timing of volcanogenic outgassing. We found support for major outgassing beginning and ending distinctly before the impact, with only the impact coinciding with mass extinction and biologically amplified carbon cycle change. Our models show that these extinction-related carbon cycle changes would have allowed the ocean to absorb massive amounts of carbon dioxide, thus limiting the global warming otherwise expected from postextinction volcanism.Entities:
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Year: 2020 PMID： 31949074 DOI： 10.1126/science.aay5055
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728