Greenbrier, Tenessee - TN013 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 : TN013.CRN Measurement file name : TN013.RWL Date checked : 06APR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1641 Ending year : 1930 Principal investigators: J.Young, W.Blozan May 1995 Site name : Greenbrier Site location : Tennessee Species information : CADN AMERICAN CHESTNUT Latitude : 3542 Longitude : -08321 Elevation : 765M Series intercorrelation: 0.538 Avg mean sensitivity : 0.133 Avg standard deviation : 0.477 Avg autocorrelation : 0.777 Number dated series : 14 Segment length tested : 50 Number problem segments: 10 Pct problem segments : 10.75 PART 5: CORRELATION OF SERIES BY SEGMENTS: tn013.rwl 13:41 Wed 06 Apr 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 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 GBR03A 1828 1930 .32A .46 .39 2 GBR03B 1822 1919 .63 .64 .64 .47 3 GBR04A 1825 1909 .30B .63 .60 4 GBR04B 1825 1909 .34 .65 .63 5 GBR05A 1782 1869 .25A .33A .46 6 GB202B 1827 1924 .42 .40 .19B 7 GB203A 1680 1918 .48 .53 .70 .65 .64 .74 .72 .78 .74 8 GB203B 1700 1914 .42 .59 .60 .58 .60 .61 .54 .47 9 GB203C 1680 1915 .56 .52 .57 .57 .62 .62 .52 .67 .70 10 GB204A 1646 1880 .79 .79 .68 .60 .57 .58 .55 .49 .28B .23B 11 GB204B 1641 1909 .82 .80 .67 .64 .61 .64 .61 .58 .40 .40 .40 12 GB204D 1644 1880 .61 .61 .59 .43 .47 .58 .50 .50 .55 .55 13 GB205A 1644 1908 .39 .36 .24B .30B .37B .59 .68 .68 .66 .61 .67 14 GB205B 1757 1912 .68 .65 .71 .68 .64 .61 Av segment correlation .65 .64 .53 .49 .55 .61 .56 .59 .49 .55 .53 PART 7: DESCRIPTIVE STATISTICS: tn013.rwl 13:41 Wed 06 Apr 2005 Page 7 ------------------------------------------------------------------------------------------------------------------------------------ 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 GBR03A 1828 1930 103 3 1 .343 1.94 3.87 .804 .793 .195 2.70 .577 -.092 1 2 GBR03B 1822 1919 98 4 0 .544 2.69 4.74 .687 .656 .153 2.74 .477 .020 1 3 GBR04A 1825 1909 85 3 1 .461 3.01 4.81 .787 .730 .156 2.66 .458 .057 1 4 GBR04B 1825 1909 85 3 0 .477 2.99 4.85 .750 .732 .142 2.62 .487 .065 1 5 GBR05A 1782 1869 88 3 2 .365 2.09 4.94 .776 .761 .150 2.91 .539 -.095 1 6 GB202B 1827 1924 98 3 1 .280 2.60 3.60 .395 .530 .110 2.67 .421 .040 1 7 GB203A 1680 1918 239 9 0 .655 1.29 3.03 .407 .709 .160 2.57 .339 -.008 1 8 GB203B 1700 1914 215 8 0 .521 1.39 4.92 .570 .850 .157 2.68 .396 -.083 1 9 GB203C 1680 1915 236 9 0 .603 1.37 3.67 .517 .834 .153 2.54 .355 .034 1 10 GB204A 1646 1880 235 10 2 .555 1.27 3.00 .385 .840 .114 2.68 .437 -.013 1 11 GB204B 1641 1909 269 11 0 .599 1.29 5.17 .464 .866 .114 2.70 .427 -.033 1 12 GB204D 1644 1880 237 10 0 .538 1.36 3.12 .331 .864 .092 2.51 .325 -.021 1 13 GB205A 1644 1908 265 11 3 .502 1.59 2.50 .308 .741 .111 2.59 .424 .034 1 14 GB205B 1757 1912 156 6 0 .662 1.39 2.30 .276 .655 .121 2.68 .324 .003 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2409 93 10 .538 1.64 5.17 .477 .777 .133 2.91 .408 -.009