These artificial runs use the TIE-GCM v2.0 model in its 2.5 �� 2.5 configuration as the real condition model run. In order to converge to stable initial condition the TIE GCM runs for 30 days prior to the final simulation starting at 21 September 2010. This initial run was configured with default parameters. Both model runs start at 21 October 2010 and are calculated with default parameters except for the switched off auroral parameterization as well as the switched off high-latitude potential model. The influence of noise in solar activity is reduced by applying an artificial noise free sinusoidal time series for the F10.7 input.