Chattahoochee National Forest, Georgia - ga012 Additional Site Information N. Pederson, W. Blozan, A. Brice, B. Catron, C. Leland, J. Scheff, N. Malcomb, K. Tackett Notes: This chronology combines the LITU data from Frick Creek, Ga and Amicalola, GA to make the Chattahoochee National Forest LITU chronology used in the final reconstruction. 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 150 !spline stabilized (fixed 50% cutoff) common period years 1900 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 6 !series saved in tab-delimited columns 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 : GA012.CRN Measurement file name : GA012.RWL Date checked : 06JUL12 Checked by : B. Bauer Beginning year : 1537 Ending year : 2009 Principal investigators: Pederson Blozan Brice Catron Leland Scheff Malcomb Tackett Site name : Chattahoochee National Forest Site location : Georgia Species information : LITU TULIPTREE Latitude : 3440 Longitude : -08416 Elevation : 784M Series intercorrelation: 0.539 Avg mean sensitivity : 0.302 Avg standard deviation : 0.630 Avg autocorrelation : 0.727 Number dated series : 62 Segment length tested : 50 Number problem segments: 64 Pct problem segments : 10.13 PART 5: CORRELATION OF SERIES BY SEGMENTS: Chattahoochee National Forest 09:41 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 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 fcl01a 1792 1999 .65 .60 .56 .62 .83 .73 .57 .68 2 fcl01b 1750 2009 .73 .72 .60 .30B .49 .75 .70 .56 .58 .64 3 flc02a 1858 2009 .45 .60 .64 .53 .58 .64 4 fcl02b 1848 2009 .60 .57 .67 .64 .51 .63 .69 5 fcl03a 1661 2009 .52 .54 .53 .60 .66 .53 .62 .58 .41 .56 .58 .57 .74 .81 6 fcl03b 1628 2009 .26A .42 .48 .49 .72 .72 .55 .69 .49 .24A .52 .67 .75 .69 .71 7 flc04a 1539 2009 .62 .61 .39 .31A .53 .56 .32B .41 .49 .54 .65 .53 .17B .09B .51 .74 .65 .59 .66 8 flc04b 1537 2009 .62 .57 .43 .50 .50 .43 .27B .37B .51 .29A .51 .54 .45 .48 .38 .57 .68 .69 .76 9 fcl08a 1659 2009 .28B .33A .52 .73 .76 .52 .44 .48 .53 .62 .72 .71 .42 .40 10 fcl08b 1662 2009 .38 .46 .55 .48 .58 .49 .36B .47 .55 .46 .53 .69 .56 .58 11 fcl10a 1652 2009 .33A .55 .51 .47 .60 .56 .51 .46 .50 .62 .67 .57 .48 .49 12 fcl10b 1659 2009 .26B .55 .52 .46 .61 .60 .63 .45 .32B .49 .58 .56 .46 .50 13 fcl21a 1647 2009 .41 .39 .50 .55 .52 .63 .63 .69 .64 .60 .83 .80 .73 .64 .71 14 fcl21b 1670 2009 .59 .56 .51 .64 .80 .74 .76 .68 .53 .76 .78 .72 .70 .66 15 fcx22a 1776 2009 .50 .45 .50 .56 .67 .74 .60 .47 .49 16 fcl22b 1627 2009 .40 .42 .39 .41 .37 .45 .48 .51 .49 .49 .42 .52 .66 .67 .66 17 fcl22a 1592 2009 .09B .09B .28A .47 .35 .40 .35 .40 .59 .62 .54 .47 .35 .29B .47 .71 .66 18 fcl22c 1777 2009 .30B .57 .69 .66 .77 .53 .42 .64 .65 19 fcl22d 1739 2009 .27B .37B .53 .59 .56 .51 .60 .68 .69 .74 .76 20 fll23b 1842 2009 .34 .43 .55 .66 .71 .68 .69 21 fcl23a 1884 2009 .38 .47 .64 .59 .62 22 fcl23c 1745 2009 .70 .73 .76 .67 .57 .51 .59 .56 .53 .51 .40 23 fcl23b 1759 2009 .83 .76 .60 .52 .54 .62 .69 .59 .46 .48 24 fcl24c 1884 2009 .74 .65 .60 .68 .71 25 fcl25b 1850 2009 .52 .56 .70 .81 .83 .78 26 flc26a 1712 2009 .48 .42 .31A .42 .36B .22B .22B .47 .63 .67 .50 .48 27 fcl27x 1723 2009 .49 .66 .60 .42 .51 .47 .45 .49 .64 .71 .55 .61 28 fcl28a 1777 2009 .41 .53 .52 .05B .38 .64 .65 .67 .67 29 fcl28b 1721 2009 .41 .48 .52 .61 .51 .53 .64 .62 .63 .65 .59 .55 30 fcl40a 1816 2009 .53 .54 .61 .71 .79 .62 .44 .45 31 fcl40b 1844 2009 .66 .64 .64 .51 .48 .49 .42 32 fcl41b 1852 2009 .57 .63 .71 .69 .51 .56 33 fcl42a 1694 2009 .55 .51 .60 .57 .60 .83 .65 .47 .64 .79 .74 .66 .74 34 fcl42b 1692 2009 .54 .46 .55 .57 .67 .80 .64 .37 .46 .77 .68 .45 .51 35 fcl43a 1859 2009 .46 .48 .53 .50 .44 .59 36 fcl43b 1857 2009 .57 .69 .77 .70 .45 .50 37 fcl44a 1723 2009 .40 .41 .55 .73 .70 .71 .64 .60 .33 .26A .49 .64 38 fcl44b 1860 2009 .57 .72 .70 .63 .60 .63 39 fcl46b 1852 2009 .56 .59 .50 .59 .62 .67 40 fcl47a 1822 2009 .70 .71 .73 .74 .75 .60 .41 .42 41 fcl48a 1827 2009 .59 .58 .47 .42 .47 .54 .59 42 fcl48b 1847 2009 .51 .50 .50 .49 .55 .50 .49 43 fcl91a 1751 2009 .74 .68 .67 .50 .42 .61 .74 .78 .67 .69 44 jat01a 1831 2009 .40 .37 .44 .59 .61 .50 .60 45 JAT02a 1881 2009 .52 .64 .67 .71 .69 46 JAT04a 1888 2009 .58 .53 .47 .59 .62 47 jat07b 1770 2007 .44 .58 .69 .62 .48 .58 .63 .65 .80 .78 48 jat09b 1552 1879 .31A .42 .60 .69 .64 .63 .56 .52 .54 .59 .59 .54 .58 49 jat09a 1575 2009 .37 .60 .62 .53 .62 .56 .45B .47 .43 .22B .29B .49 .30B .19B .28A .48 .50 50 jat11a 1647 2009 .51 .51 .30A .22B .19B .15B .27A .36 .06B .05B .13B .13B .40 .34B .41 51 jat11b 1627 1874 .52 .50 .43 .48 .43 .36 .33 .49 .47 52 jat13a 1613 1724 .39 .56 .64 .32A 53 jat13b 1608 2009 .31B .32B .43 .54 .45 .18B .10B .10B .19B .45 .57 .45 .48 .53 .41 .48 54 jat14a 1726 2009 .31B .37 .50 .44 .43 .37 .24B .49 .63 .64 .64 55 jat14b 1776 2009 .43 .33 .39 .53 .63 .75 .69 .63 .67 56 JAT15a 1834 2009 .59 .49 .50 .64 .54 .58 .65 57 jat15b 1821 2009 .52 .51 .36 .57 .72 .64 .54 .61 58 jat16a 1674 2009 .70 .70 .73 .66 .50 .11B .12B .46 .68 .73 .74 .74 .50 .55 59 jat17a 1595 2006 .20B .25A .60 .59 .36 .39 .50 .23B .12B .23B .18B .26B .33 .48 .51 .57 .38 60 jat17b 1621 1749 .62 .62 .64 .53 .48 61 jat18b 1870 2009 .47 .46 .55 .65 .67 .70 62 JAT19a 1870 2009 .54 .57 .69 .69 .71 .75 Av segment correlation .62 .49 .31 .41 .49 .49 .47 .48 .49 .52 .52 .53 .49 .48 .56 .61 .61 .58 .60 PART 7: DESCRIPTIVE STATISTICS: Chattahoochee National Forest 09:41 Fri 06 Jul 2012 Page 11 ----------------------------------------------------------------------------------------------------------------------------------- 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 fcl01a 1792 1999 208 8 0 .673 1.58 4.86 .820 .703 .294 2.75 .398 -.047 2 2 fcl01b 1750 2009 260 10 1 .640 1.61 4.92 .815 .775 .280 2.58 .397 .005 4 3 flc02a 1858 2009 152 6 0 .548 1.19 5.78 .922 .877 .339 2.61 .422 -.017 2 4 fcl02b 1848 2009 162 7 0 .635 1.26 4.41 .786 .842 .311 2.82 .555 -.040 1 5 fcl03a 1661 2009 349 14 0 .582 .99 3.71 .392 .686 .247 2.48 .306 -.052 1 6 fcl03b 1628 2009 382 15 2 .566 .91 3.52 .486 .805 .233 2.54 .277 .005 2 7 flc04a 1539 2009 471 19 4 .541 .64 2.59 .358 .728 .328 2.53 .286 -.004 3 8 flc04b 1537 2009 473 19 3 .520 .67 2.79 .421 .580 .391 2.56 .299 .007 3 9 fcl08a 1659 2009 351 14 2 .542 .83 6.10 .994 .931 .350 2.59 .354 -.020 1 10 fcl08b 1662 2009 348 14 1 .505 .95 5.19 .810 .891 .333 2.62 .384 -.017 1 11 fcl10a 1652 2009 358 14 1 .540 1.00 4.42 .758 .885 .306 2.81 .416 -.012 1 12 fcl10b 1659 2009 351 14 2 .492 .84 3.48 .617 .887 .289 2.67 .297 -.049 1 13 fcl21a 1647 2009 363 15 0 .638 .89 4.51 .605 .901 .235 2.62 .410 -.015 1 14 fcl21b 1670 2009 340 14 0 .671 .93 3.11 .544 .895 .211 2.62 .360 -.059 1 15 fcx22a 1776 2009 234 9 0 .574 1.40 3.74 .552 .640 .238 2.57 .356 -.002 3 16 fcl22b 1627 2009 383 15 0 .521 .85 3.04 .475 .740 .302 2.69 .315 -.007 1 17 fcl22a 1592 2009 418 17 4 .437 .87 4.22 .556 .767 .323 2.77 .361 -.078 1 18 fcl22c 1777 2009 233 9 1 .566 1.05 2.90 .504 .627 .282 2.77 .484 .016 3 19 fcl22d 1739 2009 271 11 2 .564 .75 1.84 .319 .639 .277 2.69 .434 -.008 1 20 fll23b 1842 2009 168 7 0 .556 1.48 5.03 .770 .680 .315 2.71 .496 -.070 1 21 fcl23a 1884 2009 126 5 0 .502 1.17 3.74 .836 .867 .251 2.56 .414 -.058 1 22 fcl23c 1745 2009 265 11 0 .569 1.35 3.81 .621 .665 .260 2.64 .333 -.015 2 23 fcl23b 1759 2009 251 10 0 .629 1.45 3.64 .616 .631 .280 2.92 .381 -.023 1 24 fcl24c 1884 2009 126 5 0 .642 1.90 5.61 1.195 .772 .328 2.88 .550 -.028 1 25 fcl25b 1850 2009 160 6 0 .691 1.86 4.91 .908 .713 .276 2.56 .385 .019 1 26 flc26a 1712 2009 298 12 4 .521 1.16 6.42 .988 .898 .251 2.59 .273 -.009 1 27 fcl27x 1723 2009 287 12 0 .568 1.07 4.49 .735 .843 .279 2.70 .437 .021 1 28 fcl28a 1777 2009 233 9 1 .511 1.58 5.25 .806 .703 .282 2.57 .308 -.072 1 29 fcl28b 1721 2009 289 12 0 .592 1.08 3.69 .532 .584 .339 2.71 .385 -.030 1 30 fcl40a 1816 2009 194 8 0 .578 1.26 2.81 .415 .606 .223 2.53 .328 -.006 2 31 fcl40b 1844 2009 166 7 0 .519 1.09 2.09 .377 .701 .209 2.73 .396 .014 1 32 fcl41b 1852 2009 158 6 0 .608 1.49 4.31 .677 .503 .355 2.68 .462 -.008 3 33 fcl42a 1694 2009 316 13 0 .652 .95 2.47 .420 .620 .303 2.67 .362 -.056 1 34 fcl42b 1692 2009 318 13 0 .569 .85 3.09 .423 .595 .333 2.67 .300 -.010 1 35 fcl43a 1859 2009 151 6 0 .500 1.15 2.73 .437 .611 .259 2.62 .450 -.108 1 36 fcl43b 1857 2009 153 6 0 .606 1.05 2.54 .427 .588 .275 2.66 .391 -.022 1 37 fcl44a 1723 2009 287 12 1 .547 .85 4.50 .553 .756 .289 2.53 .290 -.010 1 38 fcl44b 1860 2009 150 6 0 .613 .77 1.99 .322 .588 .268 2.68 .445 -.024 1 39 fcl46b 1852 2009 158 6 0 .574 .83 1.52 .225 .411 .242 2.54 .464 -.027 1 40 fcl47a 1822 2009 188 8 0 .611 1.42 3.67 .434 .462 .244 2.53 .297 -.025 1 41 fcl48a 1827 2009 183 7 0 .517 .91 2.21 .344 .742 .183 3.01 .521 -.037 1 42 fcl48b 1847 2009 163 7 0 .470 .88 3.13 .528 .840 .217 2.55 .363 -.028 1 43 fcl91a 1751 2009 259 10 0 .670 1.17 2.86 .458 .661 .266 2.49 .296 -.024 1 44 jat01a 1831 2009 179 7 0 .524 1.12 6.13 1.071 .777 .366 2.72 .388 -.047 1 45 JAT02a 1881 2009 129 5 0 .623 1.53 5.47 1.120 .850 .328 2.85 .463 -.034 1 46 JAT04a 1888 2009 122 5 0 .590 1.57 8.46 1.306 .861 .326 2.61 .494 -.033 1 47 jat07b 1770 2007 238 10 0 .601 1.18 3.61 .660 .419 .478 2.86 .407 .000 2 48 jat09b 1552 1879 328 13 1 .510 .90 2.38 .444 .773 .272 2.56 .304 -.020 1 PART 7: DESCRIPTIVE STATISTICS: Chattahoochee National Forest 09:41 Fri 06 Jul 2012 Page 12 ----------------------------------------------------------------------------------------------------------------------------------- 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 () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 49 jat09a 1575 2009 435 17 6 .432 .82 2.33 .383 .683 .310 2.65 .354 -.049 1 50 jat11a 1647 2009 363 15 10 .266 .49 5.11 .493 .734 .370 2.89 .411 -.059 1 51 jat11b 1627 1874 248 9 0 .430 .71 2.64 .509 .769 .380 2.96 .405 .005 2 52 jat13a 1613 1724 112 4 1 .408 1.83 6.70 1.419 .801 .330 2.85 .482 .022 1 53 jat13b 1608 2009 402 16 6 .346 .88 4.78 .745 .850 .286 2.58 .293 -.010 1 54 jat14a 1726 2009 284 11 2 .455 .86 3.96 .539 .534 .428 2.91 .412 -.027 1 55 jat14b 1776 2009 234 9 0 .559 1.08 3.24 .604 .611 .395 2.65 .344 -.027 1 56 JAT15a 1834 2009 176 7 0 .576 .97 3.06 .462 .645 .304 2.56 .337 -.058 1 57 jat15b 1821 2009 189 8 0 .586 .95 2.49 .441 .671 .292 2.67 .378 -.059 1 58 jat16a 1674 2009 336 14 2 .564 .86 3.99 .485 .644 .333 2.83 .352 -.013 1 59 jat17a 1595 2006 412 17 7 .309 .64 4.74 1.705 .905 .335 2.37 .183 .080 2 60 jat17b 1621 1749 129 5 0 .553 1.53 4.09 1.025 .789 .306 2.74 .430 -.018 1 61 jat18b 1870 2009 140 6 0 .573 1.25 5.37 .908 .787 .321 2.79 .455 -.046 1 62 JAT19a 1870 2009 140 6 0 .652 .92 2.79 .453 .605 .331 2.82 .392 -.087 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 15750 632 64 .539 1.02 8.46 .630 .727 .302 3.01 .365 -.022