The Terrestrial Biogeochemistry Laboratory in the Department of Earth and Environmental Science of the University of Pennsylvania invites applicants for competitive Ph.D. fellowships in soil carbon biogeochemistry. Projects seek to quantify and characterize the recalcitrant pools of pyrogenic and geogenic carbon in soils. We’ll examine chemical transformations and dissolution as mechanisms controlling their fate in the critical zone. Positions are ideal for candidates who have completed an MSc in soil science, geosciences, environmental chemistry, ecosystem science or related fields, but outstanding BSc graduates in such programs will be considered. For further information, please contact Dr. Alain Plante by email (email@example.com) or consult the department website (www.sas.upenn.edu/earth). Applications can be submitted directly online (https://www.applyweb.com/upenng/) before December 15.