Climate of the Past
Climate of the Past
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Articles | Volume 12, issue 2
Articles | Volume 12, issue 2
https://doi.org/10.5194/cp-12-241-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/cp-12-241-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 12, issue 2
Research article
 | 
10 Feb 2016
Research article |  | 10 Feb 2016

Estimates of late middle Eocene pCO2 based on stomatal density of modern and fossil Nageia leaves

X. Y. Liu, Q. Gao, M. Han, and J. H. Jin

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Short summary
We reconstruct late middle Eocene (42.0–38.5 Ma) pCO2 based on the fossil leaves of Nageia maomingensis Jin et Liu collected from the Maoming Basin, Guangdong Province, China. This work indicates that the stomatal density (SD) inversely responds to pCO2, while stomatal index (SI) has almost no relationship with pCO2, using "modern" leaves of N. motleyi (Parl.) De Laub. Regression approach gives a pCO2 of 351.9 ± 6.6 ppmv, whereas stomatal ratio method gives a pCO2 of 537.5 ± 56.5 ppmv.
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Special issue
Climatic and biotic events of the Paleogene