Big Canoe, Georgia - ga013 Additional Site Information N. Pederson, W. Blozan, A. Brice, B. Catron, C. Leland, J. Scheff, N. Malcomb, K. Tackett Notes: This chronology combines the QUMO and QUAL data from Big Canoe, GA, a gated, private community north of Atlanta. Replication of QUMO was low, so both collections from the same forest were combined to make the Big Canoe Q. leucobalanus chronology that was used in the final drought reconstruction. The two species are highly-correlated with one another. 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 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 103 !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 : GA013.CRN Measurement file name : GA013.RWL Date checked : 06JUL12 Checked by : B. Bauer Beginning year : 1646 Ending year : 2009 Principal investigators: Pederson Blozan Brice Catron Leland Scheff Malcomb Tackett Site name : Big Canoe Site location : Georgia Species information : QUSP OAK Latitude : 3428 Longitude : -08419 Elevation : 730M Series intercorrelation: 0.457 Avg mean sensitivity : 0.184 Avg standard deviation : 0.353 Avg autocorrelation : 0.723 Number dated series : 26 Segment length tested : 50 Number problem segments: 40 Pct problem segments : 14.65 PART 5: CORRELATION OF SERIES BY SEGMENTS: Big Canoe 11:40 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 BCW04a 1656 2009 .24A .21B .49 .57 .64 .56 .56 .62 .56 .61 .63 .46 .47 .59 2 BCW07a 1656 2009 .57 .46 .55 .27A .09B .27B .39 .43 .41 .45 .54 .48 .19B .13B 3 BCW07b 1646 2009 .49 .36 .30A .13B .21B .34B .39 .22A .09B .41 .53 .43 .27A .19B 4 BCW09a 1777 2009 .61 .63 .33 .45 .68 .56 .50 .54 .63 5 BCW09b 1778 2009 .50 .64 .37 .42 .51 .45 .58 .61 .56 6 bcw11a 1746 2009 .43 .41 .45 .34B .38 .41 .28A .48 .55 .39 .45 7 BCW12b 1693 1959 .49 .47 .58 .66 .63 .60 .52 .36 .44 .59 .58 8 bcw43a 1800 2009 .61 .49 .39 .54 .57 .53 .61 .62 9 BCW47a 1762 2009 .44 .31A .40 .47 .35B .46 .66 .52 .31B .44 10 BCW47b 1774 2009 .29B .29B .35 .48 .39 .63 .62 .52 .36 .41 11 BCW50a 1786 2009 .52 .58 .44 .45 .52 .52 .58 .62 .52 12 bcw53b 1741 2009 .52 .56 .38 .39 .58 .45 .52 .43 .31A .43 .51 13 BCW54a 1780 2009 .53 .39B .41 .44 .69 .58 .61 .48 .46 14 BCW56a 1700 2009 .31A .25A .27A .55 .36 .23B .47 .60 .57 .63 .53 .54 15 BCW83a 1765 2009 .58 .47 .45 .28B .17B .43 .52 .52 .52 .55 16 BCW88a 1809 2009 .55 .51 .59 .68 .78 .72 .67 .60 17 BCC02a 1720 2009 .37 .41 .48 .49 .48 .43 .34 .42 .52 .43 .47 .44 18 BCC03b 1766 2009 .49 .44 .52 .61 .48 .48 .74 .55 .35 .29B 19 BCC04a 1780 1969 .31B .36 .57 .65 .68 .64 .38 20 BCC05a 1694 2009 .26A .26A .27A .38 .45 .38 .51 .51 .40 .50 .52 .45 .54 21 BCC05b 1735 1899 .32A .33 .50 .38 .48 .54 22 BCC13a 1768 2009 .34 .35 .44 .59 .55 .59 .56 .57 .57 .56 23 BCC13b 1757 2009 .52 .64 .54 .58 .59 .61 .43 .37 .51 .57 24 BCC16b 1736 2009 .62 .70 .68 .66 .65 .59 .50 .46 .49 .53 .54 25 BCC17a 1678 2009 .29B .32B .51 .48 .39 .48 .43 .33 .44 .42 .36 .46 .50 26 BCC27a 1700 2008 .57 .51 .61 .51 .50 .68 .59 .48 .57 .58 .22A .23B Av segment correlation .43 .34 .40 .41 .45 .47 .47 .47 .45 .52 .55 .51 .46 .47 PART 7: DESCRIPTIVE STATISTICS: Big Canoe 11:40 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 BCW04a 1656 2009 354 14 2 .503 .70 2.39 .338 .748 .232 2.72 .343 -.051 1 2 BCW07a 1656 2009 354 14 5 .368 .44 .90 .147 .717 .204 2.82 .372 -.004 1 3 BCW07b 1646 2009 364 14 8 .317 .44 .83 .131 .641 .195 2.59 .336 -.008 3 4 BCW09a 1777 2009 233 9 0 .521 .68 1.91 .244 .794 .175 2.39 .273 .010 1 5 BCW09b 1778 2009 232 9 0 .489 .80 2.12 .246 .751 .154 2.62 .398 -.044 1 6 bcw11a 1746 2009 264 11 2 .410 .53 1.91 .234 .718 .212 2.70 .415 -.053 1 7 BCW12b 1693 1959 267 11 0 .521 .75 1.90 .244 .618 .187 2.59 .317 -.031 1 8 bcw43a 1800 2009 210 8 0 .533 1.03 2.32 .299 .698 .160 2.82 .402 -.027 1 9 BCW47a 1762 2009 248 10 3 .446 .98 2.48 .341 .703 .207 2.63 .427 .004 1 10 BCW47b 1774 2009 236 10 2 .448 .99 2.84 .345 .674 .196 2.82 .474 -.007 1 11 BCW50a 1786 2009 224 9 0 .513 .89 1.72 .203 .637 .150 2.51 .294 -.017 1 12 bcw53b 1741 2009 269 11 1 .451 .59 1.30 .183 .698 .175 2.60 .328 -.038 1 13 BCW54a 1780 2009 230 9 1 .268 .71 1.67 1.299 .731 .166 2.32 .141 .151 4 14 BCW56a 1700 2009 310 12 4 .428 .84 2.46 .343 .792 .180 2.58 .277 -.019 1 15 BCW83a 1765 2009 245 10 2 .446 1.00 2.27 .390 .737 .205 2.68 .413 .017 1 16 BCW88a 1809 2009 201 8 0 .614 .84 3.00 .387 .775 .191 2.64 .354 -.012 1 17 BCC02a 1720 2009 290 12 0 .439 .72 1.69 .216 .709 .164 2.86 .371 -.015 1 18 BCC03b 1766 2009 244 10 1 .481 .97 2.33 .385 .841 .163 2.62 .358 -.026 1 19 BCC04a 1780 1969 190 7 1 .494 .89 4.06 .351 .566 .165 3.06 .398 .016 1 20 BCC05a 1694 2009 316 13 3 .418 .61 2.02 .288 .812 .217 2.80 .410 .017 1 21 BCC05b 1735 1899 165 6 1 .406 .96 2.85 .405 .710 .194 2.99 .358 -.065 1 22 BCC13a 1768 2009 242 10 0 .508 .97 3.13 .357 .791 .146 2.68 .368 -.066 1 23 BCC13b 1757 2009 253 10 0 .519 1.11 2.30 .398 .748 .195 2.66 .445 -.048 3 24 BCC16b 1736 2009 274 11 0 .560 .89 1.95 .274 .716 .173 2.52 .306 .006 1 25 BCC17a 1678 2009 332 13 2 .394 .58 2.62 1.088 .739 .185 2.63 .213 .095 2 26 BCC27a 1700 2008 309 12 2 .505 .61 1.44 .166 .709 .160 2.68 .394 -.015 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 6856 273 40 .457 .77 4.06 .353 .723 .184 3.06 .352 -.008