This Carbon Monitoring System (CMS) Session will update the scientific and policy/decision-making communities on the status of NASA's CMS Flux and Biomass Pilot Initiatives, as well as results from the CMS Science Definition Team on CMS application requirements development.  The largest portion of the session is devoted to break-out sessions on the 1) Science and 2) Policy issues related to Carbon Monitoring. These sessions are part of an on-going effort to leverage NASA science and technology capabilities for scientific discovery and the most beneficial use to policy and decision-makers.