Stomatal characteristics of an extinct Cretaceous conifer, Pseudofrenelopsis parceramosa
(Fontaine) Watson, are used to reconstruct atmospheric carbon dioxide (p CO2) over a time�…

Neogene atmospheric paleo-CO2 estimates based on fossils of the extant cupressaceous
conifer species Taxodium distichum from the Brandywine Formation of Maryland and the�…

Estimates of the atmospheric carbon dioxide concentration levels were made for three time
intervals of the Early Cretaceous using the stomatal indices of an extinct fossil conifer�…

The stomatal index (a measure of stomatal density) of an extinct Australian Early Jurassic
araucariacean conifer species, Allocladus helgei Jansson, is used to reconstruct the�…

Leaf gas-exchange models show considerable promise as paleo-CO 2 proxies. They are
largely mechanistic in nature, provide well-constrained estimates even when CO 2 is high�…

Currently, there is only one paleo‐CO2 record from plant macrofossils that has sufficient
stratigraphic resolution to potentially capture a transient spike related to rapid carbon�…

Atmospheric carbon dioxide concentration has shifted dynamically over the Phanerozoic
according to mass balance models and the majority of proxy estimates. A new paleo-CO 2�…

It has been shown that a strong negative correlation exists between stomatal density and
atmospheric CO 2 concentration in the leaves of deciduous temperate forest trees. This�…

Reliable reconstructions of atmospheric carbon dioxide concentrations (pCO 2) are required
at higher resolution than currently available to help resolve the relationship between mass�…

It has been demonstrated that the leaves of a range of forest tree species have responded to
the rising concentration of atmospheric CO2 over the last 200 years by a decrease in both�…