The focus of our research is on the semivolatile organic component of the carbon and nutrient cycles. Genomic basis of the biogeochemistry of anthropogenic and biogenic organic compounds. Fate, transport and biogeochemistry of organic pollutants at regional and global Scales. Antarctic, Arctic and marine pollution. Interactions between anthropogenic dissolved organic carbon and microbes. Microbial degradation of anthropogenic dissolved organic carbon. Chemical characterization of the anthropogenic component of dissolved organic carbon. Atmospheric deposition of organic matter and pollutants. Anthropogenic organic carbon (organic pollutants) as a vector of global change.