Hansen et al. (2005)
Also: Hansen et al. 2005
Earth's Energy Imbalance: Confirmation and Implications
Hansen, J., Nazarenko, L., Ruedy, R., Sato, M., Willis, J., Del Genio, A., ... & Tausnev, N. (2005). Earth's energy imbalance: Confirmation and implications. science, 308(5727), 1431-1435. Link to paper
DOI: https://doi.org/10.1126/science.1110252
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.