Very large release of mostly volcanic carbon during the Palaeocene-Eocene Thermal Maximum.
Very large release of mostly volcanic carbon during the Palaeocene-Eocene Thermal Maximum.
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DOI：
10.1038/nature23646
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发表时间：
2017-08-30
期刊：
影响因子：
64.8
通讯作者：
Foster GL
中科院分区：
文献类型：
--
作者：
Gutjahr M;Ridgwell A;Sexton PF;Anagnostou E;Pearson PN;Pälike H;Norris RD;Thomas E;Foster GL
Global warming during the Palaeocene-Eocene Thermal Maximum (PETM, ~56 Ma) is commonly interpreted as being primarily driven by the destabilization of carbon from surficial sedimentary reservoirs such as methane hydrates. However, the source(s) of carbon remain controversial. Resolving this is key to understanding the proximal cause, as well as quantifying the roles of triggers versus feedbacks in driving the event. Here we present new boron isotope data – a proxy for seawater pH – that demonstrate the occurrence of persistently suppressed surface ocean pH across the PETM. Our pH data, alongside a paired carbon isotope record, are assimilated in an Earth system model to reconstruct the unfolding carbon cycle dynamics across the event. We find strong evidence for a much larger (>10,000 PgC) and on average isotopically heavier carbon source than considered previously. This leads us to identify volcanism associated with the North Atlantic Igneous Province, rather than carbon from a surficial reservoir, as the main driver of the PETM. We also find that, although amplifying organic carbon feedbacks with climate likely played only a subordinate role in driving the event, enhanced organic matter burial was important in ultimately sequestering the released carbon and accelerating the recovery of the Earth system.
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影响因子：
64.8
作者：
DeConto, Robert M.;Galeotti, Simone;Beerling, David J.
通讯作者：
Beerling, David J.
影响因子：
4.9
作者：
Cao, L.;Eby, M.;Yool, A.
通讯作者：
Yool, A.
影响因子：
4.6
作者：
Edwards, N;Marsh, R
通讯作者：
Marsh, R
DOI：
10.1073/pnas.1603348113
发表时间：
2016-10-25
影响因子：
11.1
作者：
Frieling, Joost;Svensen, Henrik H.;Sluijs, Appy
通讯作者：
Sluijs, Appy
影响因子：
2.7
作者：
JENKYNS, HC
通讯作者：
JENKYNS, HC