RELEASE NOTES FOR CRU CY v3.25: 20 September 2017 NOTE: Please read the main document, 'Read_Me_CRU_CY.txt', as well. The 3.25 release of the CRU CY dataset covers the period 1901-2016. It uses the same observation dataset that was used by v4.01, to allow comparisons to be made. The best published reference to use is that of the underlying dataset, CRU TS: Harris, I., Jones, P.D., Osborn, T.J. and Lister, D.H. (2014), Updated high-resolution grids of monthly climatic observations – the CRU TS3.10 Dataset. Int. J. Climatol., 34: 623–642. doi: 10.1002/joc.3711 This release uses updated country definitions; so a parallel release is available using the old definitions. Please see the separate file, 'Read_Me_CRU_CY_Updated_Country_Definitions.txt', for details. As always, please contact BADC in the first instance if you have any questions, observations or suggestions. Ian Harris NCAS-Climate Climatic Research Unit School of Environmental Sciences University of East Anglia Norwich NR4 7TJ