Tree-Ring Density Reconstructions of Summer Temperature Patterns Across Western North America since 1600

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Summer half-year (April-September) mean temperatures have been reconstructed across western North America between 1600 and 1983 by Briffa et al. For complete details on the analysis see the full data set description.

Enter year(s) to plot. The available years are 1600-1983, and multiple years can be averaged. Enter years separated by commas(1601,1866,1903,...) Click on the plots to get a larger image with anomalies for each gridpoint on the plot, or increase X and Y dimensions in the Control Panel and click 'Update Spreadsheet'.
Anomalies(in degrees C) are relative to the 1951-70 base period.
Plots of the Time Series at each grid point are also available.

Control Panel X 150 200 250 300 400 480 500 600 800 Y 150 200 250 300 400 480 500 600 800 Columns 1 2 3 4 5 6 7 8 9 10	Years(separate multiple years with commas)	Years(separate multiple years with commas)	Years(separate multiple years with commas)
Blue triangles pointing down are negative anomalies. Red triangles pointing up are positive anomalies. Size of triangle indicates magnitude of anomaly. Click on maps to see the value at each point.	Data	Data	Data