Table 1.

Sampling sites and tree-ring chronologies used for STREC

Site	Latitude, degrees	Longitude, degrees	Number of trees, subfossil/living	Length, A.D.	MSL, years ± SD	Mean ring width, 1/100 mm ± SD	Mean correlation, mean ± SD	Lag1 AC	AR order
L1	+53.86	−72.41	190/25	642–2011	106 ± 32	39 ± 24	0.43 ± 0.25	0.84	4
L12	+54.46	−70.39	220/25	572–2011	101 ± 32	42 ± 23	0.45 ± 0.23	0.78	9
L16	+54.10	−71.63	75/25	774–2011	112 ± 36	37 ± 20	0.46 ± 0.25	0.75	10
L18	+54.25	−72.38	419/25	596–2011	105 ± 38	38 ± 26	0.40 ± 0.27	0.76	4
L20	+54.56	−71.24	586/25	653–2011	102 ± 36	40 ± 24	0.41 ± 0.23	0.72	9
L22	+54.15	−70.29	292/25	650–2011	104 ± 38	39 ± 25	0.42 ± 0.25	0.73	6

Lag1 AC and AR order are computed over the time period retained for STREC (A.D. 910–2011). AR order, the order selected by the Akaike Information Criterion of the autoregressive model fitted to the RCS chronology; Lag1 AC, lag 1 autocorrelation of the RCS chronology; mean correlation, average correlation between standardized individual series and their respective local RCS chronology; MSL, mean segment length.