Constraints on Atmospheric CO2 Obtained from Fossil Metasequoia for the Middle Eocene Polar Forests on Axel Heiberg Island, Nunavut, Canada

Abstract

There are many people who provided valuable assistance throughout the completion of this thesis and deserve thanks. Most importantly, I would like to thank my advisor, Dr. Dana Royer. Through hours of conversation during the last two years I received more guidance and direction for this project and my academic career than could possibly be repaid with a thank you. I also want to thank Dr. Ben LePage and Dr. Suzanne O'Connell for agreeing to be committee members and for providing helpful comments to improve this thesis. Dr. LePage, Dr. Chris Williams, and Dr. Hope Jahren provided help with stratigraphy and geological background from the Napartulik site. Dr. Peter Franks provided assistance regarding the application of his gas-exchange model. Dr. Richard Jagels and Dr. LePage were helpful while gathering information on Metasequoia. Dr. Michaela Grein and Dr. Anita Roth-Nebelsick provided needed assistance in application of their gas-exchange model.