Male Köster

Dr. Male Köster is a researcher in the Marine Geochemistry department at the Alfred Wegener Institute (AWI) in Bremerhaven. His work focuses on biogeochemical processes in marine sediments, particularly iron cycling, isotope geochemistry, and subseafloor biosphere dynamics. He has conducted extensive research on sediment cores from regions like the Nankai Trough, South Georgia, and the Argentina Continental Margin, examining diagenesis, volcanic ash impacts, and depositional conditions. Köster’s studies often involve collaborative expeditions such as IODP Expedition 370 and RV SONNE Cruise SO260. His research integrates laboratory experiments (e.g., olivine weathering studies) with field data, advancing understanding of sedimentary processes and their environmental implications.

• Key affiliations: AWI Marine Geochemistry Lab, Alfred Wegener Institute.
• Expertise: Isotope geochemistry, sediment diagenesis, subseafloor geochemistry.

Research interests include iron and manganese cycling, stable isotope analysis, and the interplay between tectonic activity and sedimentary biogeochemistry. Recent work highlights the influence of physical and chemical factors on marine sediment evolution, with applications to climate proxy studies and deep biosphere dynamics.