evidence: There is a degree of uncertainty regarding these different solar forcing reconstructions (e.g., Foukal et al. 2004) that is reflected in the climate model simulations. That is, Foukal et al. (2004), Lean et al. (2002), and others have questioned the earlier solar reconstructions of Hoyt and Schatten (1993) and Lean et al. (1995) in that low-frequency variation of solar output may be manifested only as amplitude modulation of the 11-yr solar cycle. This could reduce the amplitude of the low-frequency solar forcing that was present in the earlier reconstructions. We are currently performing sensitivity experiments with solar forcing that includes only amplitude modulation of the 11-yr solar cycle. Preliminary results show that the early century warming in the coupled model still occurs, but with somewhat reduced amplitude.