Ironbound Island, Maine - ME050 Additional Site Information E. Larson S. Allen N. Flinner S. Labarge T. Wilding Reference: Evan R. Larson; Sara Allen; Nicholas L. Flinner; Steven G. Labarge; Thomas C. Wilding. 2013. The Need and Means to Update Chronologies in a Dynamic Environment. Tree-Ring Research, Vol. 69, No. 1, pp. 21-27. Keywords: dendrochronology, tree chronology, Red Spruce, Picea rubens, Maine Funding: UW-Platteville Scholarly Activity Improvement Fund COFECHA output: Chronology file name : ME050.CRN Measurement file name : ME050.RWL Date checked : 12JUL21 Checked by : B. Bauer Beginning year : 1830 Ending year : 2009 Principal investigators: E. Larson S. Allen N. Flinner S. Labarge T. Wilding Site name : Ironbound Island Site location : Maine Species information : PCRU RED SPRUCE Latitude : 4424 Longitude : -06808 Elevation : 43M Series intercorrelation: 0.479 Avg mean sensitivity : 0.182 Avg standard deviation : 0.967 Avg autocorrelation : 0.870 Number dated series : 12 Segment length tested : 50 Number problem segments: 9 Pct problem segments : 13.24 PART 5: CORRELATION OF SERIES BY SEGMENTS: Ironbound Island 16:51 Mon 12 Jul 2021 Page 5 ----------------------------------------------------------------------------------------------------------------------------------- Correlations of 50-year dated segments, lagged 25 years Flags: A = correlation under .3281 but highest as dated; B = correlation higher at other than dated position Seq Series Time_span 1850 1875 1900 1925 1950 1975 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 IRB001 1888 2006 .27B .38 .47 .43 .36 2 IRB002b 1875 2009 .47 .50 .56 .62 .54 3 IRB002A 1887 2009 .54 .60 .61 .43 .36 4 IRB003a 1864 2009 .40 .45 .42 .26A .56 .53 5 IRB003b 1866 2009 .54 .52 .50 .27B .23B .36 6 IRB004b 1881 2009 .57 .68 .60 .67 .58 7 IRB005a 1830 2009 .43 .56 .69 .66 .58 .48 8 IRB005b 1862 2009 .63 .66 .60 .42 .38 .27B 9 IRB006a 1874 2009 .53 .54 .53 .59 .65 .59 10 IRB006b 1863 2009 .47 .52 .67 .71 .43 .36 11 IRB007b 1850 2009 .46 .66 .66 .49 .30A .22B 12 IRB007a 1850 2009 .36 .48 .59 .51 .19B .19B Av segment correlation .48 .52 .57 .51 .46 .41 PART 7: DESCRIPTIVE STATISTICS: Ironbound Island 16:51 Mon 12 Jul 2021 Page 8 ----------------------------------------------------------------------------------------------------------------------------------- Corr //-------- Unfiltered --------\\ //---- Filtered -----\\ No. No. No. with Mean Max Std Auto Mean Max Std Auto AR Seq Series Interval Years Segmt Flags Master msmt msmt dev corr sens value dev corr () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 IRB001 1888 2006 119 5 1 .400 2.59 5.43 .771 .762 .162 2.49 .398 -.022 1 2 IRB002b 1875 2009 135 5 0 .506 2.56 5.93 1.084 .918 .130 2.44 .317 -.040 1 3 IRB002A 1887 2009 123 5 0 .496 1.41 3.72 .599 .863 .177 2.75 .561 .036 1 4 IRB003a 1864 2009 146 6 1 .426 1.62 4.19 .869 .893 .175 2.50 .414 .001 1 5 IRB003b 1866 2009 144 6 2 .435 2.15 7.45 1.133 .783 .227 2.75 .464 -.072 2 6 IRB004b 1881 2009 129 5 0 .615 1.79 6.62 1.407 .818 .277 2.79 .513 -.085 1 7 IRB005a 1830 2009 180 6 0 .566 1.56 5.83 1.188 .926 .204 2.80 .484 -.065 1 8 IRB005b 1862 2009 148 6 1 .487 1.12 3.60 .642 .883 .206 2.69 .494 -.043 3 9 IRB006a 1874 2009 136 6 0 .546 2.56 5.90 1.083 .916 .129 2.39 .281 -.036 1 10 IRB006b 1863 2009 147 6 0 .505 1.52 4.93 .823 .834 .193 2.83 .451 -.047 2 11 IRB007b 1850 2009 160 6 2 .416 1.72 4.83 .889 .862 .147 2.65 .331 -.032 2 12 IRB007a 1850 2009 160 6 2 .366 1.53 3.98 1.047 .947 .158 2.84 .394 .011 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1727 68 9 .479 1.82 7.45 .967 .870 .182 2.84 .425 -.034