Analyses of instrumental data quantify the role of the North Atlantic Oscillation (NAO) and El Nino/Southern Oscillation (ENSO) in explaining regional temperature and precipitation patterns over the Northern Hemisphere. In this study, the NAO and ENSO signals are explored for present and 6000 years before present (B.P.) using results from the NCAR Climate System Model (CSM), a fully-coupled atmosphere-land-ocean-sea ice model without flux adjustments. The present-day and 6000 year B.P. runs exhibit similar simulation of the ENSO and NAO phenomena, both in terms of magnitudes and frequencies. Their roles in explaining wintertime temperature and precipitation anomalies over North America, Eurasia, and the North Atlantic, though, differ between the time periods. Details of these simulations will be presented