WASHINGTON (NASA PR) — NASA Administrator Bill Nelson announced that Dr. Katherine Calvin will serve the agency in dual roles as chief scientist and senior climate advisor effective Monday.

Calvin succeeds Jim Green, who retired from his role Jan. 1 as chief scientist after more than 40 years of service at NASA, and Gavin Schmidt, who has served as senior climate advisor in an acting capacity since the position was created in February 2021. NASA established the senior climate advisor position to ensure effective fulfillment of the Biden-Harris Administration’s climate science objectives for the agency. Schmidt will maintain his role as director of NASA’s Goddard Institute for Space Studies in New York.