Joyce Kilmer Mem Forest, North Carolina - NC011 Additional Site information Stahle, D.W., M.K. Cleaveland, M.D. Therrell, D.A. Gay, P.J. Young and W. Blozan Stahle et al American Chestnut Chronologies Files NC010*-NC011* and TN011*-TN015* Reference: Stahle, D.W., M.K. Cleaveland, M.D. Therrell, D.A. Gay, P.J. Young and W. Blozan. Submitted. A Retrospective Dendroecology of American Chestnut. Ecological Monographs, 1999. Detrending is double, with the first option being an exponential. If the exponential is fit, a spline with half power cutoff equal to the length of the series is then used detrend the 1st set of indices. If the exponential cannot be fit, then a regression line is fit, and a spline with stiffness equal to 67% of the series length is fit. In no case is a spline with stiffness specification less than 100 yrs fit. Indices are computed as the ratio of measurement to fitted curve. Multivariate autoregressive modeling, with model order initially chosen by Akaike Info Criterion(AIC) minimum, gives the pooled model. If the AIC first minimum is inadequate, the model order can be specified. The individual series are each modeled with the pooled model and the individual residual series are averaged to derive the residual chronology. If the residual chronology still contains an unacceptable amount of persistence, it is rewhitened. The variance of each chronology is detrended with a cubic spline of stiffness equal to the chronology length. COFECHA output: Chronology file name : NC011.CRN Measurement file name : NC011.RWL Date checked : 24MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1737 Ending year : 1928 Principal investigators: D.Stahle, S.Sierzchula Aug 1993 Site name : Joyce Kilmer Mem Forest Site location : N.Carolina Species information : CADN AMERICAN CHESTNUT Latitude : 3521 Longitude : -08355 Elevation : 825M Series intercorrelation: 0.651 Avg mean sensitivity : 0.147 Avg standard deviation : 0.573 Avg autocorrelation : 0.662 Number dated series : 24 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 0.92 PART 5: CORRELATION OF SERIES BY SEGMENTS: nc011.rwl 12:07 Thu 24 Mar 2005 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 1725 1750 1775 1800 1825 1850 1875 1774 1799 1824 1849 1874 1899 1924 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 JOY02A 1783 1922 .59 .50 .61 .54 .45 2 JOY02B 1764 1924 .83 .56 .50 .65 .57 .53 3 JOY02C 1764 1923 .80 .54 .53 .64 .49 .45 4 JOY03A 1797 1911 .65 .63 .71 .67 .65 5 JOY03B 1748 1921 .83 .83 .74 .84 .83 .77 .65 6 JOY03C 1753 1921 .87 .73 .76 .74 .72 .63 7 JOY04A 1845 1898 .46 .52 8 JOY04B 1840 1905 .56 .67 .67 9 JOY07A 1820 1928 .57 .58 .64 .49 10 JOY07B 1804 1880 .30A .43 .46 11 JOY11B 1802 1902 .63 .69 .66 .62 12 JOY12A 1754 1881 .81 .46 .55 .74 .74 13 JOY12B 1754 1824 .79 .55 14 JOY15A 1851 1922 .63 .60 15 JOY16A 1822 1919 .66 .66 .81 .76 16 JOY16B 1819 1919 .83 .86 .89 .73 17 JOY17B 1801 1898 .44 .62 .68 18 JOY19A 1774 1905 .54 .70 .70 .64 .59 .59 19 JOY19B 1737 1919 .70 .69 .65 .68 .74 .66 .53 20 JOY19C 1775 1910 .59 .52 .68 .74 .66 21 JOY19E 1763 1918 .77 .52 .41 .62 .63 .59 22 JOY21A 1754 1896 .78 .54 .63 .69 .52 23 JOY22A 1809 1918 .59 .72 .75 .69 24 JOY23A 1795 1900 .69 .67 .66 .70 .70 Av segment correlation .77 .77 .61 .60 .66 .65 .61 PART 7: DESCRIPTIVE STATISTICS: nc011.rwl 12:07 Thu 24 Mar 2005 Page 6 ------------------------------------------------------------------------------------------------------------------------------------ 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 JOY02A 1783 1922 140 5 0 .508 1.68 2.76 .427 .781 .129 2.48 .343 .012 1 2 JOY02B 1764 1924 161 6 0 .685 1.63 4.47 .599 .802 .130 2.67 .307 -.049 2 3 JOY02C 1764 1923 160 6 0 .648 1.67 3.93 .533 .764 .137 2.76 .323 -.005 1 4 JOY03A 1797 1911 115 5 0 .620 1.35 2.31 .340 .693 .146 2.75 .502 .050 1 5 JOY03B 1748 1921 174 7 0 .776 2.31 4.13 .579 .510 .188 2.59 .469 .051 1 6 JOY03C 1753 1921 169 6 0 .761 2.33 4.07 .515 .454 .167 2.66 .442 .058 1 7 JOY04A 1845 1898 54 2 0 .513 2.44 4.41 .731 .604 .195 2.75 .591 -.078 1 8 JOY04B 1840 1905 66 3 0 .608 2.70 5.45 .872 .784 .134 2.88 .513 .086 1 9 JOY07A 1820 1928 109 4 0 .527 2.31 4.36 .756 .746 .170 2.87 .404 .062 1 10 JOY07B 1804 1880 77 3 1 .392 2.59 5.68 1.108 .879 .136 2.76 .423 .003 1 11 JOY11B 1802 1902 101 4 0 .624 3.71 6.77 1.036 .817 .133 2.65 .453 .003 1 12 JOY12A 1754 1881 128 5 0 .743 2.19 3.93 .625 .626 .183 2.62 .370 .041 1 13 JOY12B 1754 1824 71 2 0 .724 2.47 3.71 .563 .546 .174 2.40 .348 -.009 1 14 JOY15A 1851 1922 72 2 0 .669 2.44 3.55 .498 .481 .169 2.56 .405 .005 1 15 JOY16A 1822 1919 98 4 0 .698 3.52 5.15 .748 .479 .160 2.62 .442 .114 1 16 JOY16B 1819 1919 101 4 0 .787 2.38 3.59 .433 .516 .142 2.59 .504 .094 1 17 JOY17B 1801 1898 98 3 0 .580 1.75 3.37 .558 .772 .156 2.68 .416 .023 1 18 JOY19A 1774 1905 132 6 0 .553 1.28 2.18 .275 .722 .114 2.73 .391 .034 1 19 JOY19B 1737 1919 183 7 0 .660 2.01 3.93 .461 .618 .140 2.65 .332 .041 1 20 JOY19C 1775 1910 136 5 0 .608 2.70 5.42 .789 .781 .125 2.66 .355 .070 1 21 JOY19E 1763 1918 156 6 0 .680 1.35 1.85 .185 .440 .111 2.60 .367 -.005 1 22 JOY21A 1754 1896 143 5 0 .666 1.89 4.79 .558 .659 .157 2.61 .348 -.043 2 23 JOY22A 1809 1918 110 4 0 .675 1.88 3.51 .486 .759 .136 2.59 .472 .023 1 24 JOY23A 1795 1900 106 5 0 .684 3.37 5.73 .780 .771 .124 2.85 .576 -.002 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2860 109 1 .651 2.16 6.77 .573 .662 .147 2.88 .408 .025