Irradiance calculated for solar parameters compared to WHI. The light and dark grey shaded area indicates the minimum and maximum measurement error of the SIRS WHI (Solar Irradiance Reference Spectra for the 2008 Whole Heliosphere Interval), respectively (see, Woods et al. 2009, for a detailed description). Solar irradiance (top panels) calculated using MPS-ATLAS with three different assumptions: no convection, with convection but no overshoot, and with convection and overshoot. The flux deviations between WHI observed irradiance and models in % are shown in the bottom panels.