Moderate to Elevated Atmospheric CO2 During the Early Paleocene Recorded by Platanites Leaves of the San Juan Basin, New Mexico Article Swipe
Joseph N. Milligan
,
Andrew G. Flynn
,
Jennifer Kowalczyk
,
Richard S. Barclay
,
Jie Geng
,
Dana L. Royer
,
Daniel J. Peppe
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1029/2021pa004408
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.1029/2021pa004408
Throughout the Phanerozoic, estimated CO 2 levels from CO 2 proxies generally correlate well with independent estimates of temperature. However, some proxy estimates of atmospheric CO 2 during the Late Cretaceous and early Paleocene are low (<400 ppm), seemingly at odds with elevated sea surface temperature. Here we evaluate early Paleocene CO 2 by applying a leaf gas‐exchange model to Platanites leaves of four early Paleocene localities from the San Juan Basin, New Mexico (65.66–64.59 Ma). We first calibrate the model on two modern Platanus species, Platanus occidentalis and P. × acerifolia , where we find the leaf gas‐exchange model accurately predicts present‐day CO 2 , with a mean error rate between 5% and 14%. Applying the model to the early Paleocene, we find CO 2 varies between ∼660 and 1,140 ppm. These estimates are consistent with more recent CO 2 estimates from boron, leaf gas‐exchange, liverwort, and paleosol proxies that all suggest moderate to elevated levels of CO 2 during the Late Cretaceous and early Paleocene. These levels of atmospheric CO 2 are more in keeping with the elevated temperature during this period.
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- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1029/2021pa004408
- https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2021PA004408
- OA Status
- hybrid
- Cited By
- 7
- References
- 81
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4220998865
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- OpenAlex ID
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https://openalex.org/W4220998865Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1029/2021pa004408Digital Object Identifier
- Title
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Moderate to Elevated Atmospheric CO2 During the Early Paleocene Recorded by Platanites Leaves of the San Juan Basin, New MexicoWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2022Year of publication
- Publication date
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2022-03-30Full publication date if available
- Authors
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Joseph N. Milligan, Andrew G. Flynn, Jennifer Kowalczyk, Richard S. Barclay, Jie Geng, Dana L. Royer, Daniel J. PeppeList of authors in order
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https://doi.org/10.1029/2021pa004408Publisher landing page
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2021PA004408Direct link to full text PDF
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://onlinelibrary.wiley.com/doi/pdfdirect/10.1029/2021PA004408Direct OA link when available
- Concepts
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Phanerozoic, Cretaceous, Paleosol, Proxy (statistics), Structural basin, Environmental science, Geology, Atmospheric sciences, Paleontology, Cenozoic, Mathematics, Loess, StatisticsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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7Total citation count in OpenAlex
- Citations by year (recent)
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2025: 2, 2023: 3, 2022: 2Per-year citation counts (last 5 years)
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81Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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