Bent Creek Experimental Forest Q. leucobalanus, North Carolina - nc022 Additional Site Information P. Baker N. Pederson Notes: This chronology combines the QUMO and QUAL data from Bent Creek Experimental Forest, NC to make the Bent Creek, NC Q. leucobalanus chronology used in the final reconstruction. The two collections are highly-correlated, but not well-replicated within each species. So, they were combined to boost site-level replication. These samples were collected for a dendroecological study (Baker, P. J. 2003. Tree age estimation for the tropics: A test from the southern Appalachians. Ecological Applications 13: 1718 – 1732). Some raw data here have values of -8888 for years where the rings were distorted or otherwise not useful for dendroclimatology. The latest version of ARSTAN reads these as dummy variables and can in-fill these gaps. See the citation above for standardization methods. The ARSTAN standardization menu is below: opt plt tree-ring data type 1 !tucson ring-width format missing data in gap -9 0 !missing values estimated (no plots) data transformation 4 0 !spread/level power transform (no plots) first detrending 2 0 0 !1st-neg expon curve (k>0), no = opt 5 second detrending 6 0 0 !2nd-horizontal line through mean robust detrending 1 !non-robust detrending methods used interactive detrend 2 !interactive detrending used index calculation 2 !residuals or differences (rt-gt) ar modeling method 1 0 !non-robust autoregressive modeling pooled ar order 0 0 !minimum aic pooled ar model order fit series ar order 0 !pooled ar order fit to all series mean chronology 2 0 0 0 !robust (biweight) mean chronology stabilize variance 90 !spline stabilized (fixed 50% cutoff) common period years 1900 1995 !first and last years of common period site-tree-core mask SSTTTC !site-tree-core separation mask running rbar 50 25 0 !running rbar window/overlap (no plots) printout option 2 !summary & series statistics printed core series save 1 !series saved in tucson raw data format summary plot displays 3 !spaghetti and mean chronology plots stand dynamics stuf 0 0 !no stand dynamics analyses done running mean window 0 !running mean window width percent growth change 0 !percent growth change threshold std error threshold 0 !standard error limit threshold Reference: Pederson, N., A.R. Bell, T.A. Knight, C. Leland, N. Malcomb, K.J. Anchukaitis, K. Tackett, J. Scheff, A. Brice, B. Catron, W. Blozan, and J. Riddle. 2012. Long-term perspective on a modern drought in the American Southeast. Environmental Research Letters, 7, 014034. COFECHA output: Chronology file name : NC022.CRN Measurement file name : NC022.RWL Date checked : 06JUL12 Checked by : B. Bauer Beginning year : 1716 Ending year : 1996 Principal investigators: P. Baker N. Pederson Site name : Bent Creek Experimental Forest Site location : N. Carolina Species information : QUSP OAK Latitude : 3530 Longitude : -08238 Elevation : 790M Series intercorrelation: 0.483 Avg mean sensitivity : 0.187 Avg standard deviation : 0.457 Avg autocorrelation : 0.746 Number dated series : 40 Segment length tested : 50 Number problem segments: 37 Pct problem segments : 15.61 PART 5: CORRELATION OF SERIES BY SEGMENTS: Bent Creek leucobalanus 11:15 Fri 06 Jul 2012 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 1925 1950 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 HT106a 1882 1996 .69 .76 .58 .32A 2 HT109a 1894 1996 .53 .59 .57 .58 3 HT123a 1782 1996 .56 .52 .60 .42 .44 .58 .71 .77 4 HT131a 1880 1996 .64 .67 .65 .42 5 HT221a 1774 1996 .24A .20B .05B .19B .41 .53 .55 .56 .62 6 HT221b 1738 1866 .29A .49 .27B .21B .18B 7 HT222a 1761 1996 .29A .44 .46 .53 .55 .69 .75 .75 .63 8 HT224a 1733 1834 .48 .66 .71 .67 9 RP101a 1759 1996 -.07B .00B .43 .55 .55 .50 .50 .36 .43 10 RP106a 1737 1996 .24A .35 .64 .64 .64 .54 .27A .32A .43 .47 11 RP106b 1770 1996 .31A .38 .56 .54 .39 .27B .39 .25A .23A 12 RP116a 1830 1996 .53 .66 .77 .72 .34 .14B 13 RP126a 1850 1996 .20B .41 .64 .48 .33 14 RP144a 1816 1915 .44 .54 .58 .63 15 RP152a 1813 1949 .57 .53 .52 .58 .62 16 RP152b 1794 1979 .56 .68 .64 .62 .70 .61 .41 .33A 17 RP153a 1838 1996 .60 .70 .74 .73 .51 .43 18 HT102a 1893 1996 .74 .72 .62 .56 19 HT103a 1870 1996 .45 .46 .58 .59 .46 20 HT104a 1870 1996 .64 .59 .75 .77 .73 21 HT108a 1867 1996 .68 .66 .74 .49 .15B 22 HT113a 1896 1996 .62 .67 .74 .55 23 HT204a 1792 1996 .17B .14B .15B .13B .22B .45 .53 .50 24 HT206a 1852 1996 .37 .47 .51 .51 .48 25 HT208a 1759 1996 .68 .61 .58 .58 .57 .44 .46 .57 .39 26 HT213a 1716 1996 .27A .43 .51 .51 .37 .46 .59 .53 .38 .46 27 HT213b 1781 1996 .73 .54 .42 .46 .47 .47 .35 .25A 28 HT216a 1890 1996 .75 .75 .65 .60 29 HT226a 1872 1996 .54 .65 .71 .64 .59 30 HT227a 1876 1996 .43 .42 .42 .43 31 HT239a 1873 1992 .75 .76 .71 .59 .37 32 HT244a 1876 1996 .54 .57 .73 .60 33 RP133a 1873 1996 .56 .56 .71 .42 .50 34 RP137a 1891 1996 .18B .22B .35 .50 35 RP139a 1891 1996 .63 .67 .35 .42 36 RP146a 1830 1996 .53 .40 .54 .45 .24B .45 37 RP147a 1815 1996 .35B .54 .64 .56 .50 .22B .15B 38 RP150a 1879 1996 .52 .71 .52 .42 39 RP156a 1807 1996 .50 .45 .45 .44 .58 .52 .13B 40 RP158a 1827 1996 .44 .42 .78 .82 .67 .63 Av segment correlation .32 .38 .44 .46 .48 .51 .55 .60 .51 .44 PART 7: DESCRIPTIVE STATISTICS: Bent Creek leucobalanus 11:15 Fri 06 Jul 2012 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 HT106a 1882 1996 115 4 1 .525 1.77 3.45 .801 .830 .203 2.78 .485 .059 1 2 HT109a 1894 1996 103 4 0 .556 2.13 4.38 .745 .754 .186 2.59 .495 -.030 2 3 HT123a 1782 1996 215 8 0 .584 1.38 2.98 .519 .785 .186 2.69 .484 -.012 1 4 HT131a 1880 1996 117 4 0 .533 1.62 3.95 .653 .786 .191 2.90 .574 -.027 1 5 HT221a 1774 1996 223 9 4 .402 .79 1.69 .409 .924 .169 3.06 .581 -.021 1 6 HT221b 1738 1866 129 5 4 .235 .66 1.66 .304 .796 .202 2.79 .337 -.060 1 7 HT222a 1761 1996 236 9 1 .553 1.29 2.83 .409 .800 .147 2.66 .437 .009 3 8 HT224a 1733 1834 102 4 0 .568 1.64 3.03 .411 .736 .131 2.52 .367 .026 1 9 RP101a 1759 1996 238 9 2 .278 .83 2.81 .768 .079 .228 2.29 .186 -.032 1 10 RP106a 1737 1996 260 10 3 .433 .85 2.01 .424 .864 .242 2.67 .427 -.011 1 11 RP106b 1770 1996 227 9 4 .344 .77 1.57 .282 .749 .211 2.63 .393 -.003 1 12 RP116a 1830 1996 167 6 1 .488 1.01 1.94 .332 .655 .207 2.59 .416 -.051 1 13 RP126a 1850 1996 147 5 1 .363 1.59 3.98 .919 .905 .195 2.62 .427 -.050 1 14 RP144a 1816 1915 100 4 0 .527 1.41 3.31 .557 .825 .182 2.82 .458 .003 1 15 RP152a 1813 1949 137 5 0 .592 1.07 1.80 .278 .747 .144 2.75 .490 -.026 1 16 RP152b 1794 1979 186 8 1 .573 1.29 2.21 .300 .719 .131 2.58 .385 .001 1 17 RP153a 1838 1996 159 6 0 .596 1.29 2.32 .298 .682 .142 2.67 .446 .054 1 18 HT102a 1893 1996 104 4 0 .630 2.04 3.57 .570 .674 .174 2.74 .580 .000 1 19 HT103a 1870 1996 127 5 0 .488 1.15 1.89 .308 .705 .164 2.59 .419 -.092 1 20 HT104a 1870 1996 127 5 0 .689 1.54 2.56 .435 .735 .163 2.82 .538 .020 2 21 HT108a 1867 1996 130 5 1 .505 1.08 3.43 .573 .841 .198 2.81 .478 -.040 1 22 HT113a 1896 1996 101 4 0 .569 1.78 3.67 .640 .881 .137 2.67 .516 .029 1 23 HT204a 1792 1996 205 8 5 .301 1.48 3.21 .389 .641 .178 2.68 .430 -.021 1 24 HT206a 1852 1996 145 5 0 .439 1.40 3.17 .721 .882 .231 2.41 .330 -.062 1 25 HT208a 1759 1996 238 9 0 .544 1.37 2.64 .347 .645 .157 2.52 .306 -.019 1 26 HT213a 1716 1996 281 10 1 .435 .76 1.81 .321 .829 .205 2.70 .413 -.014 1 27 HT213b 1781 1996 216 8 1 .459 .84 1.56 .233 .595 .185 2.65 .376 .022 1 28 HT216a 1890 1996 107 4 0 .654 1.95 3.62 .527 .732 .147 2.69 .512 -.063 1 29 HT226a 1872 1996 125 5 0 .571 1.32 3.15 .560 .789 .196 2.65 .377 -.045 1 30 HT227a 1876 1996 121 4 0 .423 .97 2.47 .436 .807 .208 2.63 .408 .042 1 31 HT239a 1873 1992 120 5 0 .606 1.62 3.54 .524 .777 .168 2.67 .468 -.016 1 32 HT244a 1876 1996 121 4 0 .573 1.51 2.64 .431 .765 .148 2.84 .411 .024 1 33 RP133a 1873 1996 124 5 0 .531 1.29 3.33 .749 .877 .225 2.76 .443 .024 1 34 RP137a 1891 1996 106 4 2 .317 .93 1.77 .354 .777 .193 2.40 .346 .015 1 35 RP139a 1891 1996 106 4 0 .528 1.32 3.32 .630 .832 .228 2.65 .414 -.025 1 36 RP146a 1830 1996 167 6 1 .447 .87 1.88 .369 .781 .243 2.72 .536 .025 2 37 RP147a 1815 1996 182 7 3 .410 .79 1.41 .211 .682 .161 2.81 .487 .004 1 38 RP150a 1879 1996 118 4 0 .486 1.03 2.61 .434 .811 .192 2.62 .431 -.068 1 39 RP156a 1807 1996 190 7 1 .427 .74 1.75 .310 .775 .215 2.81 .499 -.059 1 40 RP158a 1827 1996 170 6 0 .641 1.41 2.85 .593 .851 .176 2.80 .374 -.004 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 6292 237 37 .483 1.20 4.38 .457 .746 .187 3.06 .430 -.012