Ph.D. University of Groningen (the Netherlands), 1978
Senior Scientist, NOAA's Climate Monitoring and Diagnsotics Laboratory
Biogeochemical cycles, atmospheric chemistry, climate and global change, stable isotopes and paleoclimate.
Current Research Projects
Global atmospheric measurements of CO2, CH4, CO, H2, N2O, SF6, and isotopic ratios in several of those species. Numerical models of atmospheric transport. Field measurements of air-sea gas exchange.