“…Indication that these oscillations were present prior to the 20th century is found in western juniper tree-ring data from eastern Oregon. The tree-ring data showed oscillations similar to those generated by OSCURS and appear to be a reasonable proxy for the latitude end point data mentioned above. Based on counting the troughs in the plot of the 5-year running average tree-ring widths, 34 oscillations with a spectral period of 17 years have occurred since the time of Columbus…” Full Slice

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