Lawrimore et al. (2011)
Also: Lawrimore et al. 2011
An overview of the Global Historical Climatology Network monthly mean temperature data set, version 3
Lawrimore, J. H., Menne, M. J., Gleason, B. E., Williams, C. N., Wuertz, D. B., Vose, R. S., & Rennie, J. (2011). An overview of the Global Historical Climatology Network monthly mean temperature data set, version 3. Journal of Geophysical Research: Atmosphere>s (19842012), 116(D19). Link to paper
DOI: 10.1029/2011JD016187
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.