Material in this section originates from the following categories in our Subject Index:

Stomatal Density (Proxy for Past CO2 Levels)

Material preceded by an asterisk (*) was posted after this subject summary was written and therefore is not included in the summary.  This material will be integrated into the summary at a later date.

Summary

* -- Plant Stomatal Response to Volcanogenic SO2

* -- Atmospheric CO2 Concentrations: AD 800-2000

Are Physical Properties of Stomata Unresponsive to CO2?

Stomatal Frequency Responses of Conifer Needles to Atmospheric CO2 Enrichment

Reconstructing Past Atmospheric CO2 Concentrations from Stomatal Density Measurements of Leaf Macrofossils

Atmospheric CO2 Concentrations in the Early Holocene