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. 2009 Nov 16;106(48):20348–20353. doi: 10.1073/pnas.0903029106

Fig. 4.

Fig. 4.

Pinus longaeva mean ring-width chronologies smoothed with a 50-year moving average and correlations between the White Mountain chronologies (unsmoothed) and climate data. (A) Chronologies across an elevational gradient in the White Mountains, CA. Note the difference between the highest site (SHP, upper treeline) and the other 3 sites (PAL, CWL, MWK) and the similarity of the lowest 3 sites to each other. (B) Upper-treeline chronologies from SHP in the White Mountains, CA, MWA in the Snake Range, NV, and PRL in the Ruby Range, NV. Note the similarity between these chronologies despite the distances between sites (≈200–500 km). (C) Correlation of chronologies with PRISM (21) temperature data (SHP 1896–2005, PAL and CWL 1896–2006, MWK 1896–1996, MWA and PRL 1896–2002). Bolded symbols are significant at P < 0.01. Note the similar pattern in the response to temperature between SHP and the other upper-treeline sites (MWA, PRL) and the switch in pattern in the response to temperature between SHP (upper treeline) and the 3 non-treeline sites. Winter = December, January, February; spring = March, April, May; summer = June, July, August; autumn = September, October, November.