Astrochronology of the Paleocene-Eocene Thermal Maximum on the Atlantic Coastal Plain.
Astrochronology of the Paleocene-Eocene Thermal Maximum on the Atlantic Coastal Plain.
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DOI:
10.1038/s41467-022-33390-x
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发表时间:
2022-09-24
影响因子:
16.6
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中科院分区:
文献类型:
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The chronology of the Paleocene-Eocene Thermal Maximum (PETM, ~56 Ma) remains disputed, hampering complete understanding of the possible trigger mechanisms of this event. Here we present an astrochronology for the PETM carbon isotope excursion from Howards Tract, Maryland a paleoshelf environment, on the mid-Atlantic Coastal Plain. Statistical evaluation of variations in calcium content and magnetic susceptibility indicates astronomical forcing was involved and the PETM onset lasted about 6 kyr. The astrochronology and Earth system modeling suggest that the PETM onset occurred at an extreme in precession during a maximum in eccentricity, thus favoring high temperatures, indicating that astronomical forcing could have played a role in triggering the event. Ca content data on the paleo-shelf, along with other marine records, support the notion that a carbonate saturation overshoot followed global ocean acidification during the PETM. Astrochronology of a core in Maryland suggests that the onset of the Paleocene-Eocene Thermal Maximum (PETM) warming lasted about 6 thousand years. These data are more consistent with astronomical forcing than an extraterrestial trigger for the PETM.
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影响因子:
5.3
作者:
Galeotti, Simone;Krishnan, Srinath;Lourens, Lucas
通讯作者:
Lourens, Lucas
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:
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作者:
Bralower, TJ
通讯作者:
Bralower, TJ
影响因子:
4.6
作者:
Edwards, N;Marsh, R
通讯作者:
Marsh, R
影响因子:
5.3
作者:
Kent, DV;Cramer, BS;Van der Voo, R
通讯作者:
Van der Voo, R