Fig. 4.


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Comparison of rotational variation from the TIM TSI (black), SOLSTICE Lyman-α (red), and TIMED/SEE Lyman-α (blue dot) at 121 nm during 2003–2013. Vertical lines denote Carrington rotational cycle. Black arrow in early 2008 indicates the time of 2008 outburst, when a single active region is dominating the irradiance variation. The normalized amplitudes are estimated with an intrinsic mode function I, by removing the mean of I over the analysis time and by dividing with its standard deviation, for TSI and Lyman-α line, respectively. Numbers in right and left axes indicate the normalized amplitude of the rotational variations of TSI and Lyman-α.

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