Dr. Dorothy M. Peteet is a Senior Research Scientist at NASA/Goddard Institute for Space Studies and Adjunct Professor, Columbia University. She directs the Paleoecology Division of the New Core Lab at Lamont Doherty Earth Observatory of Columbia and in collaboration with GISS climate modelers and LDEO geochemists is studying the Late Pleistocene and Holocene archives of lakes and wetlands (peatlands, salt marshes, tidal freshwater marshes, bogs, fens). Documenting past vegetational change using pollen and spores, plant and animal macrofossils, loss-on-ignition, carbon, and charcoal in conjunction with accelerator mass spectrometry (AMS) radiocarbon dating, her research provides local and regional records of vegetational and climate history and carbon sequestration. Peteet has performed GCM experiments to test hypotheses concerning LGM and abrupt climate change. She is interested in climate sensitivity from past climate changes and ecological shifts with future climate change. Droughts are of recent interest.