This historical TSI reconstruction is based on Wang, Lean, and Sheeley ("Modeling the Sun's Magnetic Field and Irradiance Since 1713", ApJ 625:522-538, 2005 May 20), which was used for solar forcings in the 2007 IPCC estimates. These data are updated through 2007 by Judith Lean (NRL) and then modified by:

1. 1. offsetting to the SORCE/TIM TSI absolute values using years 2003-2007 of overlap;
2. 2. replacing years 2003-2007 and extending to more recent times using annual averages of SORCE/TIM data.

Also see:

• Kopp, G. and Lean, J. L., "A New, Lower Value of Total Solar Irradiance: Evidence and Climate Significance," Geophys. Res. Letters Frontier article, Vol. 38, L01706, doi:10.1029/2010GL045777, 2011.
• Kopp, G., Lawrence, G., and Rottman, G., "The Total Irradiance Monitor (TIM): Science Results," Solar Physics, 230, 1, Aug. 2005, pp. 129-140.

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