Ellis (1890)
Also: Ellis 1890
On the difference produced in the mean temperature derived from daily maximum and minimum readings, as depending on the time at which the thermometers are read
Ellis, W. (1890). On the difference produced in the mean temperature derived from daily maximum and minimum readings, as depending on the time at which the thermometers are read. Quarterly Journal of the Royal Meteorological Society, 16(76), 213-220. Link to abstract
DOI: 10.1002/qj.4970167605
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.