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Abstract: Tree rings Show Global CO<sub>2</sub>-driven Rise in Leaf Photosynthesis and Increased Stomatal Regulation Since 1901 (AGU25)

Tree rings Show Global CO2-driven Rise in Leaf Photosynthesis and Increased Stomatal Regulation Since 1901

Marja Haagsma1, Christopher J Still2, Linnia R Hawkins3, Stephen P Good4, Abigail L. S. Swann5, Benjamin Buchovecky6, Amy Liu7, Gabriel J Kooperman8, Ashley Cornish8, Claire Zarakas6, Charles Koven9, James Tremper Randerson10 and Steven Voelker11, (1)Oregon State University, Biological and Ecological Engineering, Corvallis, OR, United States, (2)Oregon State University, Forest Ecosystems and Society, Corvallis, OR, United States, (3)Columbia University, Department of Earth and Environmental Engineering, New York, United States, (4)Oregon State University, Department of Biological and Ecological Engineering, Corvallis, United States, (5)University of Washington, Department of Atmospheric and Climate Science and Department of Biology, Seattle, United States, (6)University of Washington, Department of Atmospheric and Climate Science, Seattle, United States, (7)University of Washington, Department of Atmospheric and Climate Sciences, Seattle, United States, (8)University of Georgia, Department of Geography, Athens, GA, United States, (9)Lawrence Berkeley National Laboratory, Climate & Ecosystem Sciences Division, Berkeley, United States, (10)University of California Irvine, Earth System Science, Irvine, United States, (11)Michigan Technological University, College of Forest Resources and Environmental Science, Houghton, United States