Anthropogenic-scale CO2 degassing from the Central Atlantic Magmatic Province as a driver of the end-Triassic mass extinction

被引:19
作者
Capriolo, Manfredo [1 ,2 ]
Mills, Benjamin J. W. [3 ]
Newton, Robert J. [3 ]
Dal Corso, Jacopo [4 ]
Dunhill, Alexander M. [3 ]
Wignall, Paul B. [3 ]
Marzoli, Andrea [5 ]
机构
[1] Univ Padua, Dept Geosci, I-35131 Padua, Italy
[2] Univ Oslo, Ctr Earth Evolut & Dynam, N-0371 Oslo, Norway
[3] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England
[4] China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China
[5] Univ Padua, Dept Terr & Agroforestry Syst, I-35020 Legnaro, Italy
关键词
CO2; Global warming; Ocean acidification; Mass extinction; Large Igneous Provinces; End-Triassic; Biogeochemical modelling; LARGE IGNEOUS PROVINCES; JURASSIC BOUNDARY; OCEAN ACIDIFICATION; CARBON-CYCLE; BIODIVERSITY DYNAMICS; ISOTOPE STRATIGRAPHY; VOLCANISM; CONSTRAINTS; CAMP; PERTURBATIONS;
D O I
10.1016/j.gloplacha.2021.103731
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
The climatic and environmental impact of exclusively volcanic CO2 emissions is assessed during the main effusive phase of the Central Atlantic Magmatic Province (CAMP), which is synchronous with the end-Triassic mass extinction. CAMP volcanism occurred in brief and intense eruptive pulses each producing extensive basaltic lava flows. Here, CAMP volcanic CO2 injections into the surface system are modelled using a biogeochemical box model for the carbon cycle. Our modelling shows that, even if positive feedback phenomena may be invoked to explain the carbon isotope excursions preserved in end-Triassic sedimentary records, intense and pulsed volcanic activity alone may have caused repeated temperature increases and pH drops, up to 5 degrees C and about 0.2 log units respectively. Hence, rapid and massive volcanic CO2 emissions from CAMP, on a similar scale to current anthropogenic emissions, severely impacted on climate and environment at a global scale, leading to catastrophic biotic consequences.
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页数:10
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