Katherine L. B. Freeman Pool

Katherine L. B. Freeman Pool is an American geochemist and paleoclimatologist renowned for her pioneering work in applying organic molecular fossils, or biomarkers, to reconstruct past climates and environmental conditions. Her research has fundamentally advanced the fields of paleoceanography and paleoclimatology, particularly through studies of Mediterranean Sea sapropels and the development of isotopic techniques for biomarker analysis. She has held faculty positions at the University of Michigan and the University of North Carolina at Chapel Hill, mentoring numerous students and contributing significantly to the scientific community through leadership roles in organizations like the American Geophysical Union.

Early life and education

Katherine L. B. Freeman Pool completed her undergraduate studies, earning a Bachelor of Science degree from the University of Michigan. She then pursued graduate studies at the University of North Carolina at Chapel Hill, where she worked under the mentorship of renowned biogeochemist John M. Hayes. Her doctoral research, completed in 1993, focused on the molecular and isotopic records preserved in Mediterranean Sea sapropels, layers of organic-rich sediment that provide critical archives of past climate change and ocean anoxic events. This foundational work established her expertise in organic geochemistry and its application to earth history questions.

Career

Following her Ph.D., Pool conducted postdoctoral research, further honing her techniques in compound-specific isotope analysis. She joined the faculty of the University of Michigan in the Department of Earth and Environmental Sciences, where she established a leading research group in organic geochemistry. Later in her career, she returned to the University of North Carolina at Chapel Hill as a faculty member. Throughout her tenure, she has served in editorial roles for major journals such as Geochimica et Cosmochimica Acta and Organic Geochemistry, and has been active in committees for the American Geophysical Union and the Geochemical Society.

Research and contributions

Pool's research has centered on decoding the climatic and environmental signals locked in organic molecules derived from ancient plants, algae, and bacteria. She made significant contributions to understanding the formation of Mediterranean Sea sapropels, linking their deposition to changes in monsoon intensity and freshwater discharge from the Nile River. Her work has extensively utilized alkenones, lipids produced by certain algae, as tools for sea surface temperature reconstruction, refining the U^K’₃₇ paleothermometer proxy. Furthermore, she pioneered the use of compound-specific hydrogen and carbon isotopic analyses of biomarkers to trace hydrological cycles, vegetation changes, and carbon cycle dynamics during key periods like the Eocene, Miocene, and Pleistocene.

Awards and honors

In recognition of her exceptional contributions to geochemistry and paleoclimatology, Katherine L. B. Freeman Pool was elected a Fellow of the American Geophysical Union in 2010. She was also elected a Fellow of the Geochemical Society and the European Association of Geochemistry. Her research has been supported by competitive grants from the National Science Foundation and the American Chemical Society. She has been invited to deliver named lectures and present her work at major international conferences, including those organized by the International Association of Sedimentologists and the Goldschmidt Conference.

Personal life

Katherine L. B. Freeman Pool is married to fellow geochemist Christopher J. Poulsen, a climate modeler and professor at the University of Michigan. Their partnership has fostered interdisciplinary collaborations bridging geochemical proxy data with climate model simulations. Outside of her scientific pursuits, she is known to be an avid supporter of the arts and an enthusiastic gardener.