TY - JOUR
T1 - Assessing the Contributions of Comet Impact and Volcanism Toward the Climate Perturbations of the Paleocene-Eocene Thermal Maximum
AU - Liu, Zeyang
AU - Horton, Daniel E.
AU - Tabor, Clay
AU - Sageman, Bradley B.
AU - Percival, Lawrence M.E.
AU - Gill, Benjamin C.
AU - Selby, David
N1 - Funding Information:
Samples were provided by IODP, which is sponsored by NSF and participating countries under management of the Joint Oceanographic Institutions, Inc. We gratefully acknowledge the TOTAL Endowment Fund and the CUG Wuhan Dida Scholarship to D. S. and the University of Durham and China Scholarship Council to Z. L. We acknowledge the support of Antonia Hoffman, Geoff Nowell, and Chris Ottley. D. E. H. thanks the QUEST high performance computing facility at Northwestern University for computational, storage, and staff resources. C. R. T. thanks Charles Bardeen for assistance setting up the model configuration. L. M. E. P. thanks the University of Lausanne for the use of their Hg facilities and financial support. Data available from Mendeley Data ( https://doi.org/10.17632/zyw7cyw88r.1 ).
Publisher Copyright:
©2019. American Geophysical Union. All Rights Reserved.
PY - 2019/12/28
Y1 - 2019/12/28
N2 - The Paleocene-Eocene Thermal Maximum is marked by a prominent negative carbon-isotope excursion, reflecting the injection of thousands of gigatons of isotopically light carbon into the atmosphere. The sources of the isotopically light carbon remain poorly constrained. Utilizing a multiproxy geochemical analysis (osmium isotopes, mercury, sulfur, and platinum group elements) of two Paleocene-Eocene boundary records, we present evidence that a comet impact and major volcanic activity likely contributed to the environmental perturbations during the Paleocene-Eocene interval. Additionally, Earth system model simulations indicate that stratospheric sulfate aerosols, commensurate with the impact magnitude, were likely to have caused transient cooling and reduced precipitation.
AB - The Paleocene-Eocene Thermal Maximum is marked by a prominent negative carbon-isotope excursion, reflecting the injection of thousands of gigatons of isotopically light carbon into the atmosphere. The sources of the isotopically light carbon remain poorly constrained. Utilizing a multiproxy geochemical analysis (osmium isotopes, mercury, sulfur, and platinum group elements) of two Paleocene-Eocene boundary records, we present evidence that a comet impact and major volcanic activity likely contributed to the environmental perturbations during the Paleocene-Eocene interval. Additionally, Earth system model simulations indicate that stratospheric sulfate aerosols, commensurate with the impact magnitude, were likely to have caused transient cooling and reduced precipitation.
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U2 - 10.1029/2019GL084818
DO - 10.1029/2019GL084818
M3 - Article
AN - SCOPUS:85077202301
VL - 46
SP - 14798
EP - 14806
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 24
ER -