My field is global ecology, and my research emphasizes ecological contributions across the range of Earth science disciplines. My colleagues and I develop diverse approaches to quantifying large-scale ecosystem processes, using satellites, atmospheric data, models, and census data, and explore global-scale patterns of vegetation-climate feedbacks, carbon cycle dynamics, primary production, forest management, and fire. At the ecosystem-scale, we conduct experiments on grassland responses to global change, which integrate approaches from molecular biology to remote sensing.
I am one of five professors who teach the Earth Systems field studies course for advanced undergrads and co-terms at Jasper Ridge Biological Preserve. I also teach an introductory seminar on climate change for freshmen.
Director, Carnegie Institution of Global Ecology; Faculty Director, Jasper Ridge Biological Preserve; Convening lead author, IPCC Fourth Assessment Report (2007); chair, US National Committee for SCOPE (Scientific Committee on Problems of the Environment) (1993-98); Chair, US Interagency Science Steering Group on Carbon Cycle Science; lead author, first ESA-Union of Concerned Scientists assessment of regional impacts of climate change on ecosystems (1999); fellow, ESA Aldo Leopold Leadership Program; member, US National Academy of Sciences