Ralf Tiedemann

Prof. Ralf Tiedemann is a Professor of Marine Geology at the Alfred Wegener Institute (AWI), specializing in interpreting biogeochemical signatures to understand Earth's climate history. He leads the Marine Geology section and chairs the Geosciences Division at AWI. His research focuses on abrupt climate changes, carbon cycle dynamics, and oceanographic processes, with projects addressing natural climate variability, glacial-interglacial transitions, and the role of ocean circulation in global systems.

• Key affiliations: Alfred Wegener Institute, Bremerhaven.
• Research interests include paleoceanography, isotopic proxy development, and sediment core analysis.

He has authored/co-authored over 50 peer-reviewed articles, with recent work emphasizing Antarctic Circumpolar Current variability, Pliocene seaway dynamics, and deglacial stratification patterns. His fieldwork includes expeditions aboard RV Polarstern and collaborations on projects like MOSAiC. Tiedemann actively promotes open data through PANGAEA repositories and contributes to international climate research initiatives.

His work bridges geological records with modern climate models, addressing critical questions about future climate change impacts using deep-time perspectives.