Total Solar Irradiance Trends During Solar Cycles 21-24

@inproceedings{Willson2007TotalSI,
  title={Total Solar Irradiance Trends During Solar Cycles 21-24},
  author={Richard C. Willson},
  year={2007}
}
Solar rotational sunspots (< 0.3 %), faculae (< .05 %) Solar activity cycle ~ 0.1 % peak-to-peak Solar magnetic cycle + 0.04 %/decade trend • Total solar irradiance (TSI) observations have been made by contiguous, redundant, overlapping satellite experiments since 1978 during solar activity cycles 21 23. The solar activity minimum marking the inception of cycle 24 is imminent some sunspot magnetic polarity reversals have already been detected.