Maureen Raymo

Maureen E. Raymo (born 1959) is an American paleoclimatologist and marine geologist. She is the Co-Founding Dean Emerita of the Columbia Climate School and the G. Unger Vetlesen Professor of Earth & Environmental Sciences at Columbia University. From 2011 to 2022, she was also Director of Lamont-Doherty Earth Observatory's (LDEO) Core Repository and, until 2024, was the Founding Director of the LDEO Hudson River Field Station. From 2020 to 2023, she was first Interim Director then Director of Lamont-Doherty Earth Observatory, the first climate scientist and first female scientist to head the institution.

Raymo has done pioneering work on the origin of the ice ages, the geologic temperature record of the Earth, and past sea level change, publishing over 100 peer-reviewed scientific articles. Her work underlies fundamental ideas in paleoceanography including the uplift weathering hypothesis, the "41,000-year problem," the Pliocene sea-level paradox, and the Lisiecki-Raymo δ18O stack.

In 2014, Raymo became the first woman to win the Wollaston Medal for geology, which had been awarded for 183 years at the time. She was described in her nomination as "one of the foremost and influential figures in the last 30 years."