Kiehl & Trenberth (1997)
Also: Kiehl & Trenberth 1997
Earth's Annual Global Mean Energy Budget
Kiehl, J. T., Trenberth, K.E. (1997). Earth's Annual Global Mean Energy Budget. Bulletin of the American Meteorological Society. 78(2),197-208. PDF
https://doi.org/10.1175/1520-0477(1997)0782.0.co;2
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.