Kopp (2016)
Also: Kopp 2016
Magnitudes and timescales of total solar irradiance variability
Kopp, G. (2016). Magnitudes and timescales of total solar irradiance variability. Journal of Space Weather and Space Climate. 6,A30. PDF
https://doi.org/10.1051/swsc/2016025
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.