The results show:(1) For the midlatitude 500 hPa geopotential there is a signal in the model results for the ENSO events of 1982/83 and 1986/87; (2) the model underestimates the midlatitude 500 hPa geopotential interannual variability as measured by the RMS but overestimates the MSU temperature variability in this region; (3) in general, outside of the ENSO periods, there is little correlation between the model and observed data anomalies of midlatitude 500 hPa geopotential; (4) in the tropics the variables evince a stronger correlation with observations in the interannual variation; (5) in the tropics the model underestimates the variability of the 200 hPa wind and MSU temperature; (6) the model, although non-interacting with the ocean, produces a credible simulation of the low frequency variability of the equatorial Pacific low level zonal wind. (pdf file)
UCRL-MI-123395