Alexander (Lex) Van Geen is a Lamont Research Professor at the Lamont-Doherty Earth Observatory, Columbia University. Research interests include: geochemical cycling of trace elements in natural and perturbed environments, particularly redox-sensitive processes affecting metals and metalloids; and applications to mine tailings, coastal sediment, estuaries, and groundwater, as well reconstructions of past climate change in nearshore environments. More recent interests include the bridging of disciplines, including the health and social sciences, to address multi-faceted environmental problems.
