Keith R. Briffa (born 1952) is a climatologist employed since 1977 by the University of East Anglia, where he is now emeritus professor and deputy director of the Climatic Research Unit. He has authored or co-authored over 130 scholarly articles, chapters and books. In his professional work, he focuses on climate change in the late Holocene, with a special focus on northern portions of Europe and Asia. Briffa's preferred method is dendroclimatology, which is a set of procedures intended to decode information about the past climate from tree rings. Briffa helped develop data sets from trees from Canada, Fennoscandia, and northern Siberia which have been used in climate research. 
From 1994 to 2000, Briffa served on the scientific steering committee (SSC) of the PAGES project; more recently he also served on SSCs for the UK NERC Rapid Climate Change and the European Science Foundation's HOLIVAR program.
- Briffa K.R. et al. (2013). "Reassessing the evidence for tree-growth and inferred temperature change during the Common Era in Yamalia, northwest Siberia". Quaternary Science Reviews 72: 83–107. doi:10.1016/j.quascirev.2013.04.008.
- Briffa K.R. et al. (2008). "Trends in recent temperature and radial tree growth spanning 2000 years across northwest Eurasia". Phil. Trans. R. Soc. B 363 (1501): 2269–82. doi:10.1098/rstb.2007.2199. PMC 2606779. PMID 18048299.
- Osborn T.J. and K.R. Briffa (2006). "The spatial extent of 20th-century warmth in the context of the past 1200 years". Science 311 (5762): 841–4. Bibcode:2006Sci...311..841O. doi:10.1126/science.1120514. PMID 16469924.
- Briffa K.R. et al. (2002). "Unusual twentieth-century summer warmth in a 1,000-year temperature record from Siberia". Nature 376 (6536): 156–9. Bibcode:1995Natur.376..156B. doi:10.1038/376156a0.
- Briffa K.R. et al. (2001). "Low-frequency temperature variations from a northern tree ring density network". Journal of Geophysical Research. 106 (D3): 2929–2941. Bibcode:2001JGR...106.2929B. doi:10.1029/2000JD900617.
- Briffa, K.R. (2000). "Annual climate variability in the Holocene: interpreting the message of ancient trees". Quaternary Science Reviews 19 (1-5): 87–105. Bibcode:2000QSRv...19...87B. doi:10.1016/S0277-3791(99)00056-6.
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