This study uses data from the NCAR Community Climate Systems Model 3.0 (CCSM3) control simulation, to inspect the LFV of the NAO. The CCSM3 control simulation is a fully coupled (ocean, atmosphere, land, and sea ice) run with a 290-year time span, and prior work has shown the CCSM3 to be a good candidate for examining LFV associated with the NAO. In connection with NAO variability, the quality of the simulated Atlantic Water (AW) into the subsurface Arctic Ocean is evaluated. Temperature, salinity, and heat flux data are used to analyze LFV in AW, both spatially and temporally. Results concerning AW variability are discussed in comparison with observational data, and possible feedback mechanisms upon polar climate are hypothesized.