TY - JOUR
T1 - Astrochronology of the Paleocene-Eocene Thermal Maximum on the Atlantic Coastal Plain
AU - Li, Mingsong
AU - Bralower, Timothy J.
AU - Kump, Lee R.
AU - Self-Trail, Jean M.
AU - Zachos, James C.
AU - Rush, William D.
AU - Robinson, Marci M.
N1 - Funding Information:
This project was funded by the National Key R&D Program of China (2021YFA0718200, M.L.) and the Heising-Simons Foundation, United States (2016–11, M.L. and L.R.K.). M.L. acknowledges the National Natural Science Foundation of China (42072040) and the Fundamental Research Funds for the Central Universities, Peking University (7100603368). T.J.B. acknowledges the National Science Foundation grant OCE-1416663. J.M.S. and M.M.R. acknowledge funding from the U.S. Geological Survey Climate Research and Development Program. The experiment was done on the Domino cluster at the University of California at Riverside. Andy Ridgwell, Sandra Kirtland Turner, and Pam Vervoort are acknowledged for their help in cGENIE modeling. We thank Debra Willard and Kristin McDougall-Reid for their review of an early draft of the manuscript. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Funding Information:
This project was funded by the National Key R&D Program of China (2021YFA0718200, M.L.) and the Heising-Simons Foundation, United States (2016–11, M.L. and L.R.K.). M.L. acknowledges the National Natural Science Foundation of China (42072040) and the Fundamental Research Funds for the Central Universities, Peking University (7100603368). T.J.B. acknowledges the National Science Foundation grant OCE-1416663. J.M.S. and M.M.R. acknowledge funding from the U.S. Geological Survey Climate Research and Development Program. The experiment was done on the Domino cluster at the University of California at Riverside. Andy Ridgwell, Sandra Kirtland Turner, and Pam Vervoort are acknowledged for their help in cGENIE modeling. We thank Debra Willard and Kristin McDougall-Reid for their review of an early draft of the manuscript. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - 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.
AB - 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.
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U2 - 10.1038/s41467-022-33390-x
DO - 10.1038/s41467-022-33390-x
M3 - Article
C2 - 36153313
AN - SCOPUS:85138458308
SN - 2041-1723
VL - 13
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 5618
ER -