Katherine Calvin

Katherine Calvin is an American scientist. From 2022 to 2025, she was NASA's Chief Scientist and Senior Climate Advisor. In July 2023, she was elected co-chair of the Intergovernmental Panel on Climate Change (IPCC) Working Group III. As an earth scientist at the Joint Global Change Research Institute (JGCRI), she has researched human use of global resources using Earth modeling systems at JGCRI under the direction of Pacific Northwest National Laboratory (PNNL) and the University of Maryland. She has contributed to the third US National Climate Assessment as well as two special reports by the Intergovernmental Panel on Climate Change (IPCC).