Boogerman Trail, North Carolina - NC010 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 : NC010.CRN Measurement file name : NC010.RWL Date checked : 24MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1720 Ending year : 1931 Principal investigators: J.Young, R.Keeland, J.Alford May 1996 Site name : Boogerman Trail Site location : N.Carolina Species information : CADN AMERICAN CHESTNUT Latitude : 3536 Longitude : -08306 Elevation : 1065M Series intercorrelation: 0.652 Avg mean sensitivity : 0.144 Avg standard deviation : 0.560 Avg autocorrelation : 0.695 Number dated series : 15 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 1.59 PART 5: CORRELATION OF SERIES BY SEGMENTS: nc010.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 1900 1774 1799 1824 1849 1874 1899 1924 1949 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 BGR01A 1838 1929 .86 .84 .60 .60 2 BGR01B 1794 1903 .38 .45 .82 .84 .81 3 BGR06B 1832 1929 .86 .82 .78 .78 4 BGR07A 1817 1890 .57 .71 .67 5 BGR08A 1778 1895 .68 .77 .80 .74 6 BGR08B 1774 1892 .68 .68 .70 .74 .68 7 BGR08C 1772 1843 .69 .67 .66 8 BGR10A 1720 1884 .67 .65 .70 .52 .63 .73 9 BGR10B 1760 1850 .67 .56 .51 .51 10 BGR11A 1800 1924 .69 .84 .81 .77 11 BGR11B 1818 1927 .64 .72 .86 .77 .75 12 BGR12A 1734 1823 .77 .81 .52 13 BGR12B 1741 1874 .75 .76 .68 .31B .37 14 BGR13A 1849 1930 .35 .35 .36 .39 15 BGR13B 1840 1931 .68 .62 .51 .50 Av segment correlation .73 .71 .61 .58 .68 .72 .66 .60 PART 7: DESCRIPTIVE STATISTICS: nc010.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 BGR01A 1838 1929 92 4 0 .734 2.29 3.87 .591 .667 .155 2.71 .464 .125 1 2 BGR01B 1794 1903 110 5 0 .610 2.45 3.96 .598 .671 .164 2.54 .464 -.017 1 3 BGR06B 1832 1929 98 4 0 .824 2.17 3.52 .550 .740 .150 2.57 .517 .013 1 4 BGR07A 1817 1890 74 3 0 .639 2.19 4.11 .566 .486 .206 2.75 .512 .017 1 5 BGR08A 1778 1895 118 4 0 .722 1.72 3.30 .521 .796 .123 2.62 .397 .020 1 6 BGR08B 1774 1892 119 5 0 .694 1.90 2.98 .334 .585 .123 3.01 .442 .097 1 7 BGR08C 1772 1843 72 3 0 .692 2.08 2.93 .428 .590 .146 2.49 .489 .015 1 8 BGR10A 1720 1884 165 6 0 .643 2.27 4.06 .736 .896 .116 2.50 .415 .014 1 9 BGR10B 1760 1850 91 4 0 .568 2.38 3.74 .574 .802 .117 2.77 .449 .008 1 10 BGR11A 1800 1924 125 4 0 .758 2.10 3.11 .435 .480 .171 2.54 .464 -.020 2 11 BGR11B 1818 1927 110 5 0 .699 1.79 3.01 .425 .564 .182 2.60 .477 .025 1 12 BGR12A 1734 1823 90 3 0 .588 3.01 4.02 .519 .624 .115 2.45 .433 .002 2 13 BGR12B 1741 1874 134 5 1 .524 2.67 4.47 .804 .886 .105 2.51 .422 -.016 3 14 BGR13A 1849 1930 82 4 0 .470 2.04 3.35 .487 .665 .152 2.53 .364 .053 1 15 BGR13B 1840 1931 92 4 0 .573 1.97 4.28 .680 .770 .171 2.76 .490 .141 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1572 63 1 .652 2.20 4.47 .560 .695 .144 3.01 .450 .029