Articles | Volume 19, issue 10
https://doi.org/10.5194/cp-19-1993-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-19-1993-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
17 Oct 2023
Research article |
| 17 Oct 2023
| 17 Oct 2023
Bayesian age models and stacks: combining age inferences from radiocarbon and benthic δ18O stratigraphic alignment
Taehee Lee
CORRESPONDING AUTHOR
Department of Statistics, Harvard University, Cambridge, MA 02138, USA
Department of Earth Science, University of California, Santa Barbara, CA 93106, USA
Lorraine E. Lisiecki
Department of Earth Science, University of California, Santa Barbara, CA 93106, USA
Geoffrey Gebbie
Physical Oceanography Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
Charles Lawrence
Division of Applied Mathematics, Brown University, Providence, RI 02906, USA
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Yuxin Zhou, Lorraine E. Lisiecki, Stephen R. Meyers, Taehee Lee, and Charles Lawrence
EGUsphere, https://doi.org/10.5194/egusphere-2025-3741, https://doi.org/10.5194/egusphere-2025-3741, 2025
This preprint is open for discussion and under review for Geochronology (GChron).
Short summary
Short summary
Marine sediments contain valuable information about past climate changes. However, dating Pleistocene marine sediments can be difficult, and the accuracy of the age model depends on the quality of the stratigraphic alignment target. We introduce three targets – Atlantic, Pacific, and global – with three distinct chronologies for the global target that incorporate astronomical forcing constraints to various degrees. This suite of targets offers flexibility in age model construction.
Christen L. Bowman, Devin S. Rand, Lorraine E. Lisiecki, and Samantha C. Bova
Earth Syst. Sci. Data, 16, 701–713, https://doi.org/10.5194/essd-16-701-2024, https://doi.org/10.5194/essd-16-701-2024, 2024
Short summary
Short summary
We estimate an average (stack) of Western Pacific Warm Pool (WPWP) sea surface climate records over the last 800 kyr from 10 ocean sediment cores. To better understand glacial–interglacial differences between the tropical WPWP and high-latitude climate change, we compare our WPWP stack to global and North Atlantic deep-ocean stacks. Although we see similar timing in glacial–interglacial change between the stacks, the WPWP exhibits less amplitude of change.
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Short summary
Understanding of past climate change depends, in part, on how accurately we can estimate the ages of events recorded in geologic archives. Here we present a new software package, called BIGMACS, to improve age estimates for paleoclimate data from ocean sediment cores. BIGMACS creates multiproxy age estimates that reduce age uncertainty by probabilistically combining information from direct age estimates, such as radiocarbon dates, and the alignment of regional paleoclimate time series.
Understanding of past climate change depends, in part, on how accurately we can estimate the...
