Dr. David Schimel is currently a Senior Research Scientist at the Jet Propulsion Lab, leading research focused on carbon-cycle climate interactions, combining models and observations. For the previous five years, Schimel led the National Ecological Observatory Network project, was responsible for the top-level science design, site selection and observing system simulations. From 2001-2007, Schimel was at the National Center for Atmospheric Research (NCAR) as a senior scientist, with research focused on assimilation of carbon cycle data in land and atmospheric models. From 1998-2001, Schimel served as founding Co-Director and Managing Director of the Max Planck Insitute for Biogeochemistry in Jena, Germany. From 1990-1998, Schimel was at NCAR. Schimel served as convening Lead Author for the first IPCC assessment of the carbon cycle, and has served as an IPCC CLA four times, and as a Lead Author twice. From 1988-1989, Schimel was an NRC Fellow at NASA Ames. Dr. Schimel obtained his PhD in 1982 from Colorado State University, studying atmosphere-ecosystem exchange of nitrous oxide and ammonia.