Possible solar-climate imprint in temperature proxies from the middle and high latitudes of North America

Five proxy temperature time series based on tree-rings and varves from the middle and high latitudes (φ > 50°) of North America were analyzed. They cover the last 3–5 centuries. It was shown that the reconstructions from Canadian Rockies (52.15° N, 117.15° W) and northeast Alaska (68.8° N, 142.3° W) correlate appreciably with Wolf number and 10Be concentration in Greenland ice over long (T > 13 years) time scales. Correlations are weaker for the reconstruction from northwestern Canada (68.25° N, 133.33° W). Baffin Island (66.6° N, 61.3° W) and the Gulf of Alaska (49–62° N, 123–145° W) show no correlations with records of solar activity. Thus, these results indicate that solar-climatic effects have an apparent regional distribution. Possible causes of this regionality are discussed.