Ocean and sea-ice model components are being tested extensively and exercised in studies of the global ocean and of the impacts of sea-ice and atmospheric boundary conditions. There is currently a concerted effort to force a coupled ocean, sea-ice system in as similar a manner as practical when coupled to an atmospheric model. Growing activities are the assessment of component performance within a coupled CCSM integration, as well as the analysis of the coupled model output. Objectives are to investigate the interaction of the atmosphere and ocean in decadal climate fluctuations and to identify possible sources of climate drift in coupled models.