Trenberth et al. (2010)
Also: Trenberth et al. 2010
Relationships between tropical sea surface temperature and top-of-atmosphere radiation
Trenberth, K.E., Fasullo, J.T., O'Dell, C. & Wong, T. (2010). Relationships between tropical sea surface temperature and top-of-atmosphere radiation. Geophysical Research Letters. 37(3),-. PDF
https://doi.org/10.1029/2009gl042314
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.