Secular total solar irradiance trend during solar cycles 21–23

  title={Secular total solar irradiance trend during solar cycles 21–23},
  author={Richard C. Willson and Alexander V. Mordvinov},
  journal={Geophysical Research Letters},
A series of satellite total solar irradiance (TSI) observations can be combined in a precise solar magnetic cycle length composite TSI database by determining the relationship between two non‐overlapping components: ACRIM1 and ACRIM2. [ Willson and Hudson, 1991 ; Willson, 1994 ] An ACRIM composite TSI time series using the Nimbus7/ERB results [ Hoyt et al., 1992 ] to relate ACRIM1 and ACRIM2 demonstrates a secular upward trend of 0.05 percent‐per‐decade between consecutive solar activity minima… 

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