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The regression coefficient (Eq_ 3_1) for the following variables: T (mean of the monthly maximum temperatures), P (monthly total precipitation), S (monthly hours of sunshine duration), H (mean of the monthly relative humidity)_ bi – multiple regression parameters_ The test of significance gives a p-value (n=38)_
| Variables | Units | δ13Ccor | δ18O | ||
|---|---|---|---|---|---|
| bi | pi | bi | pi | ||
| ba | ‰ | −15.85 | 0.004 | −34.53 | 0.267 |
| TApr | ‰ / °C | −0.028 | 0.133 | −0.103 | 0.391 |
| TMay | ‰ / °C | −0.043 | 0.156 | 0.421 | 0.043 |
| TJun | ‰ / °C | 0.037 | 0.106 | 0.026 | 0.857 |
| TJul | ‰ / °C | −0.007 | 0.817 | 0.306 | 0.129 |
| TAug | ‰ / °C | 0.047 | 0.110 | 0.219 | 0.247 |
| TSep | ‰ / °C | −0.019 | 0.352 | −0.001 | 0.993 |
| PApr | ‰ / mm | 0.001 | 0.556 | 0.004 | 0.755 |
| PMay | ‰ / mm | −0.003 | 0.079 | 0.004 | 0.693 |
| P Jun | ‰ / mm | −0.001 | 0.596 | −0.007 | 0.588 |
| PJul | ‰ / mm | −0.001 | 0.592 | −0.009 | 0.270 |
| PAug | ‰ / mm | 0.002 | 0.148 | −0.002 | 0.797 |
| PSep | ‰ / mm | −0.001 | 0.652 | 0.002 | 0.872 |
| SApr | ‰ / hours of sunshine | −0.003 | 0.179 | 0.020 | 0.124 |
| SMay | ‰ / hours of sunshine | 0.001 | 0.521 | −0.021 | 0.110 |
| SJun | ‰ / hours of sunshine | 0.007 | 0.003 | −0.008 | 0.541 |
| SJul | ‰ / hours of sunshine | −0.006 | 0.045 | 0.029 | 0.107 |
| SAug | ‰ / hours of sunshine | 0.003 | 0.125 | −0.007 | 0.497 |
| SSep | ‰ / hours of sunshine | −0.006 | 0.013 | 0.019 | 0.205 |
| HApr | ‰ / % | −0.044 | 0.104 | 0.290 | 0.106 |
| HMay | ‰ / % | 0.040 | 0.090 | −0.237 | 0.128 |
| HJun | ‰ / % | 0.088 | 0.009 | −0.150 | 0.446 |
| HJul | ‰ / % | −0.064 | 0.104 | 0.474 | 0.071 |
| HAug | ‰ / % | −0.009 | 0.672 | −0.038 | 0.782 |
| HSep | ‰ / % | −0.090 | 0.001 | 0.120 | 0.374 |
Statistical characteristics of the site chronologies for the 1951–2012 period_ TRW – mean tree-ring width; TRI – mean tree-ring index; MS – mean sensitivity; rbt – the mean correlation of standardized series of trees – the signal strength of the chronology, EPS – the expressed population signal is a statistic for examining the common variability in a chronology_
| Site | Lat. N, | Lon. E | Elevation (m) | TRW (cm) | TRI | MS | rbt | EPS |
|---|---|---|---|---|---|---|---|---|
| A | 50°19’ | ,18°15’ | 192 | 2.20 | 1.0 | 0.23 | 0.42 | 0.93 |
| B | 50°20’ | ,18°18’ | 209 | 1.81 | 1.0 | 0.26 | 0.52 | 0.95 |
| C | 50°20’ | ,18°19’ | 218 | 1.31 | 1.0 | 0.28 | 0.49 | 0.95 |
| N | 50°22’ | ,18°23’ | 218 | 1.80 | 1.0 | 0.21 | 0.39 | 0.93 |
| S | 50°18’ | ,18°20’ | 215 | 1.48 | 1.0 | 0.22 | 0.46 | 0.93 |
| T | 50°18’ | ,18°17’ | 207 | 1.77 | 1.0 | 0.26 | 0.49 | 0.95 |