AGU member since 1990. Presently a professor at the University of Maryland Center for Environmental Science, Horn Point Laboratory. Major area of interest is numerical modeling of marine ecosystem dynamics, biogeochemistry, and biological-physical interactions. Additional interests include observing and/or modeling nitrogen fixation, phytoplankton production, harmful algal blooms, and gelatinous zooplankton population dynamics and behavior. B.S., 1983, University of Washington; Ph.D., 1990, University of California, San Diego, Scripps Institution of Oceanography. Postdoctoral researcher at Oregon State University (1991) and at Rosenstiel School of Marine and Atmospheric Science, University of Miami (1992–1994). Faculty position at University of Maryland since 1995. Member of the American Society of Limnology and Oceanography and the Estuarine Research Federation. Authored over 40 refereed publications. Research experience ranging from basin-wide biogeochemical modeling and observational studies in the Atlantic and Indian oceans to regional modeling and observational studies in the Chesapeake Bay and the California Current. Chairman of the Chesapeake Community Modeling Program Steering Committee since 2002.