Spreewell Bluff, Georgia - ga017 Additional Site Information T.A. Knight Notes: Some raw data here might 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 1 0 0 !1st-neg expon curve (k>0), no = opt 4 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 110 !spline stabilized (fixed 50% cutoff) common period years 1880 2000 !first and last years of common period site-tree-core mask SSSTTC !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 : GA017.CRN Measurement file name : GA017.RWL Date checked : 06JUL12 Checked by : B. Bauer Beginning year : 1649 Ending year : 2002 Principal investigators: T.A. Knight Site name : Spreewell Bluff Site location : Georgia Species information : PIPA LONGLEAF PINE Latitude : 3251 Longitude : -08429 Elevation : 262M Series intercorrelation: 0.577 Avg mean sensitivity : 0.467 Avg standard deviation : 0.405 Avg autocorrelation : 0.614 Number dated series : 47 Segment length tested : 50 Number problem segments: 10 Pct problem segments : 3.01 PART 5: CORRELATION OF SERIES BY SEGMENTS: Spreewell Bluff 13:54 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 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 spe02b 1879 2002 .62 .63 .71 .64 .63 2 spe03a 1812 2002 .43 .40 .49 .51 .53 .66 .66 .65 3 spe03b 1809 2002 .46 .56 .52 .57 .73 .67 .50 .48 4 spe07a 1890 2002 .70 .69 .75 .77 .78 5 spe07b 1860 2002 .57 .48 .64 .77 .85 .85 6 spe15a 1819 2002 .53 .46 .36 .46 .79 .87 .78 .76 7 spe15b 1805 2002 .66 .65 .44 .33A .69 .72 .73 .69 8 spe16b 1797 2001 .59 .61 .57 .39B .39 .74 .64 .59 .61 9 spe20a 1800 2002 .35 .48 .49 .28B .73 .87 .76 .75 10 spe20b 1857 2001 .40 .49 .69 .74 .72 .75 11 spe22a 1813 2002 .69 .70 .55 .50 .63 .70 .69 .71 12 spe22b 1860 2002 .43 .50 .65 .63 .62 .62 13 spp24a 1754 2002 .39 .33 .47 .58 .58 .67 .66 .69 .51 .51 14 spp24b 1708 2002 .31A .36 .45 .53 .50 .36 .33B .49 .64 .67 .67 .66 15 spp25a 1790 2002 .50 .50 .44 .50 .47 .46 .59 .46 .46 16 spp25b 1858 2002 .59 .40 .45 .65 .49 .48 17 spp26b 1784 1980 .51 .73 .61 .43 .44 .52 .60 .53 18 spp27a 1840 2002 .65 .61 .46 .55 .63 .64 .62 19 spp27b 1791 1951 .64 .71 .72 .59 .44 .54 .55 20 spp27c 1791 2002 .57 .60 .73 .55 .36 .51 .53 .60 .62 21 spp28a 1841 2002 .74 .68 .68 .62 .59 .60 .60 22 spp32b 1859 2002 .51 .49 .70 .65 .66 .70 23 spp33a 1848 2002 .45 .46 .51 .73 .73 .63 .63 24 spp33b 1826 2002 .61 .56 .56 .68 .71 .74 .73 25 spp35b 1817 2002 .62 .56 .48 .40 .57 .58 .61 .59 26 spp37a 1890 2002 .71 .66 .78 .81 .82 27 spp37b 1850 2002 .40 .44 .61 .68 .65 .68 28 spp39a 1850 2000 .54 .61 .82 .80 .76 .75 29 spp39b 1850 2002 .50 .68 .80 .80 .80 .82 30 spp43a 1822 2002 .58 .60 .56 .64 .67 .64 .74 .74 31 spp43b 1797 2002 .56 .59 .59 .29A .37 .66 .70 .80 .80 32 spp45a 1883 2002 .61 .69 .48 .46 .44 33 spp46a 1867 2002 .52 .49 .50 .65 .64 .67 34 spp47a 1798 2002 .57 .65 .51 .47 .53 .57 .50 .47 .49 35 spp47b 1868 2002 .52 .47 .63 .68 .68 .69 36 spp48a 1671 2002 .48 .57 .48 .44 .50 .69 .61 .56 .55 .38 .61 .57 .51 .50 37 spp48b 1649 1740 .44 .49 .50 38 spp48c 1717 1741 .71 39 spp48c 1760 2002 .62 .65 .58 .58 .45 .28A .57 .47 .42 .42 40 spp55a 1838 2002 .54 .52 .60 .60 .62 .59 .60 41 spp57a 1797 2002 .41 .40 .41 .43 .31B .51 .58 .58 .57 42 spp57b 1804 2002 .69 .57 .30A .33B .68 .72 .70 .69 43 spp60a 1820 2002 .62 .57 .46 .49 .59 .60 .59 .60 44 spp60b 1799 1949 .49 .49 .58 .52 .40 .40 45 spp61a 1681 1779 .50 .39 .51 .44 46 spp65a 1716 1819 .48 .42 .65 .67 47 spp65b 1716 1805 .51 .42 .54 .54 Av segment correlation .46 .52 .48 .43 .51 .55 .57 .56 .49 .49 .63 .66 .64 .65 PART 7: DESCRIPTIVE STATISTICS: Spreewell Bluff 13:54 Fri 06 Jul 2012 Page 9 ----------------------------------------------------------------------------------------------------------------------------------- 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 spe02b 1879 2002 124 5 0 .614 1.06 3.56 .849 .792 .456 2.62 .373 .002 1 2 spe03a 1812 2002 191 8 0 .514 .72 2.44 .505 .663 .459 2.58 .337 -.028 1 3 spe03b 1809 2002 194 8 0 .542 .60 1.96 .350 .538 .425 2.74 .426 -.033 1 4 spe07a 1890 2002 113 5 0 .725 .55 1.77 .355 .560 .486 2.63 .424 -.003 1 5 spe07b 1860 2002 143 6 0 .702 .70 2.27 .478 .627 .471 2.62 .431 -.026 1 6 spe15a 1819 2002 184 8 0 .641 .58 3.07 .558 .724 .491 2.81 .416 -.018 1 7 spe15b 1805 2002 198 8 1 .591 .39 1.54 .314 .600 .525 2.69 .449 -.046 1 8 spe16b 1797 2001 205 9 1 .565 .38 1.64 .324 .663 .520 3.07 .569 .015 1 9 spe20a 1800 2002 203 8 1 .619 .39 1.75 .348 .669 .464 2.85 .453 -.037 1 10 spe20b 1857 2001 145 6 0 .646 .73 3.57 .731 .647 .474 2.89 .514 -.063 2 11 spe22a 1813 2002 190 8 0 .611 .41 2.09 .350 .476 .625 2.85 .456 .009 1 12 spe22b 1860 2002 143 6 0 .553 .44 2.18 .414 .403 .669 3.11 .591 .051 1 13 spp24a 1754 2002 249 10 0 .524 .52 3.01 .547 .861 .469 2.84 .427 -.017 1 14 spp24b 1708 2002 295 12 2 .504 .43 2.07 .334 .522 .540 2.97 .571 .006 1 15 spp25a 1790 2002 213 9 0 .509 .65 2.33 .394 .614 .413 2.88 .529 -.025 1 16 spp25b 1858 2002 145 6 0 .508 .77 3.01 .569 .758 .425 2.83 .560 -.039 1 17 spp26b 1784 1980 197 8 0 .534 .55 1.09 .245 .426 .416 2.61 .458 -.080 1 18 spp27a 1840 2002 163 7 0 .602 .35 1.52 .290 .729 .405 2.95 .569 -.039 1 19 spp27b 1791 1951 161 7 0 .605 .43 1.45 .340 .802 .392 2.71 .505 .052 1 20 spp27c 1791 2002 212 9 0 .564 .31 2.41 .357 .860 .385 2.65 .379 .024 1 21 spp28a 1841 2002 162 7 0 .640 .64 2.74 .609 .783 .433 2.74 .330 .009 1 22 spp32b 1859 2002 144 6 0 .595 .76 2.92 .514 .295 .547 2.78 .491 .031 1 23 spp33a 1848 2002 155 7 0 .620 .95 3.73 .689 .516 .495 3.04 .531 .060 1 24 spp33b 1826 2002 177 7 0 .649 .77 2.55 .441 .289 .467 2.86 .493 .007 2 25 spp35b 1817 2002 186 8 0 .541 .21 .69 .120 .425 .442 2.84 .547 -.035 1 26 spp37a 1890 2002 113 5 0 .755 .84 1.92 .442 .566 .442 2.60 .369 -.025 1 27 spp37b 1850 2002 153 6 0 .564 .57 1.99 .374 .745 .346 3.05 .497 -.039 1 28 spp39a 1850 2000 151 6 0 .699 .66 2.53 .509 .627 .483 2.89 .527 -.056 1 29 spp39b 1850 2002 153 6 0 .715 .55 2.03 .387 .553 .454 2.70 .506 -.083 1 30 spp43a 1822 2002 181 8 0 .634 .38 1.13 .209 .421 .489 2.84 .564 .017 1 31 spp43b 1797 2002 206 9 1 .584 .76 3.57 .631 .717 .461 2.90 .492 -.008 1 32 spp45a 1883 2002 120 5 0 .521 .61 2.72 .527 .794 .432 2.83 .437 -.006 1 33 spp46a 1867 2002 136 6 0 .558 .80 2.63 .498 .656 .398 2.67 .512 .125 4 34 spp47a 1798 2002 205 9 0 .519 .32 1.49 .233 .508 .531 2.80 .435 .022 1 35 spp47b 1868 2002 135 6 0 .637 .84 3.27 .629 .699 .457 2.86 .527 .052 1 36 spp48a 1671 2002 332 14 0 .530 .33 2.23 .411 .700 .504 2.87 .469 -.066 1 37 spp48b 1649 1740 92 3 0 .556 .10 .42 .062 .337 .451 2.89 .471 -.023 2 38 spp48c 1717 1741 25 1 0 .715 1.17 2.47 .736 .330 .635 2.58 .773 -.037 1 39 spp48c 1760 2002 243 10 1 .509 .17 1.09 .138 .603 .437 3.00 .474 .016 1 40 spp55a 1838 2002 165 7 0 .581 .67 4.01 .626 .733 .480 3.05 .524 .024 1 41 spp57a 1797 2002 206 9 1 .477 .28 1.06 .211 .730 .378 2.99 .494 -.010 1 42 spp57b 1804 2002 199 8 2 .621 .34 2.92 .319 .577 .464 3.04 .499 -.047 1 43 spp60a 1820 2002 183 8 0 .578 .53 2.32 .335 .496 .489 2.80 .531 .035 1 44 spp60b 1799 1949 151 6 0 .464 .60 2.17 .424 .706 .398 2.99 .542 -.027 3 45 spp61a 1681 1779 99 4 0 .459 .44 1.92 .339 .604 .486 2.64 .536 -.007 1 46 spp65a 1716 1819 104 4 0 .557 .59 1.90 .336 .526 .443 2.69 .439 .018 1 47 spp65b 1716 1805 90 4 0 .522 .45 1.18 .254 .466 .459 2.87 .572 .017 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 7934 332 10 .577 .53 4.01 .405 .614 .467 3.11 .484 -.009