Reconstructed summer temperatures, for 24 gridpoints in the US spanning 1850 – 1983, and also 1600- 1983. Temperatures have been reconstructed through forms of tree-ring data (ring widths, ring densities and carbon and oxygen isotopes).
Western United States
Briffa, Keith, P.D. Jones, F.H. Schweingruber 1992: Tree-Ring Density Reconstructions of Summer Temperature Patterns across Western North America since 1600, Journal of Climate, vol. 5, no. 7, July
Data is in anomaly format, convert to Celsius, by multiplying each value by the standard deviation, adding the mean, subtracting 1000, then dividing by 10. This will give values relative to the 1951-70 base period. Data is in format of station number, standard deviation, mean, then the temperature anomalies.
Data is in Text format
This data is constructed by Keith Briffa of the CRU.