This session will have two groups of talks. The first, Evolution and paleocology of the biogeochemical cycles, investigates the longer geological history of the coupled biogeochemical cycles. We are very hopeful that Paul Falkowski, Rutgers, will agree to give the lead talk in this group. The second group, Coupling biogeochemical cycles across ecosystem boundaries will look at how biogeochemical cycles are coupled across ecosystem boundaries. This group will take up topics such as ecosystem subsidies, the role of fog and clouds in biogeochemical transport, and distant effects of displaced biogeochemical cycles (for example how the N cycle in Iowa affects the oxygen cycle in the Gulf of Mexico). We are hopeful to get either Nacny Rabalais, LUMCOM; or Mary Power, Department of Integrative Biology, University of California, Berkeley for the opening talk. With funding from NSF we (Jon Cole, Adrien Finzi and Inez Fung) propose this two-day organized oral session to explore the recent successes and future directions for research in coupled biogeochemical cycles. About 60-70 people will attend this workshop, including 12 invited speakers, 10 graduate students, 4 organizers and about 40 scientists (including some early-career) who have worked recently on CBC or allied fields. Many of the invitees will be PI’s who have received NSF funding through special programs in both DEB and GEO that supported research in biogeochemistry or coupled biogeochemical cycle. The product of the workshop will be a series of peer-reviewed papers in a major scientific journal in open-access mode. Funds to purchase open access are budgeted. These papers should be a valuable touchstone for assessing the current status, and more importantly, suggested future course for CBC research and its interaction with other fields. There will be three Organized Oral Sessions and an evening workshop. The workshop will consist of a panel discussion with audience participation to both summarize the status of knowledge and make specific recommendation as to how CBC research might be funded in the future.