Lower Twin Lake, Alaska, USA - ak089 Additional Site Information Gregory Wiles, Will Driscoll, Rosanne D'Arrigo Measurement type: Total ring width Purpose of Collection: Climatology - temperature analyses Detrending: Negative exponential or linear regression of any slope Location of core material: The College of Wooster - Tree Ring Lab Wooster, OH 44691 Cores available upon request Reference: Driscoll, W., G.C. Wiles, R.D. D’Arrigo, and M. Wilmking. 2005. Divergent tree growth response to recent climatic warming, Lake Clark National Park and Preserve, Alaska. Geophysical Research Letters, vol. 32, L20703, doi:10.1029/2005GL024258. COFECHA output: Chronology file name : AK089.CRN Measurement file name : AK089.RWL Date checked : 25OCT07 Checked by : B. Bauer Beginning year : 1600 Ending year : 2003 Principal investigators: Gregory Wiles Will Driscoll Rosanne D'Arrigo Site name : Lower Twin Lake Site location : Alaska Species information : PCGL WHITE SPRUCE Latitude : 6039 Longitude : -15401 Elevation : 580M Series intercorrelation: 0.551 Avg mean sensitivity : 0.203 Avg standard deviation : 0.169 Avg autocorrelation : 0.805 Number dated series : 40 Segment length tested : 50 Number problem segments: 27 Pct problem segments : 7.74 PART 5: CORRELATION OF SERIES BY SEGMENTS: Lower Twin Lake 10:44 Thu 25 Oct 2007 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 1900 1925 1950 1975 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 TW01A 1647 1739 .77 .74 .60 .54 2 TW03A 1650 1730 .68 .62 .55 3 TW04B 1705 1848 .54 .55 .30B .20B .28A 4 TW05 1699 1875 .57 .64 .66 .71 .68 .62 .69 .69 5 TW08 1820 2002 .70 .69 .68 .65 .67 .71 .81 .81 6 TW11SW 1749 2002 .55 .53 .60 .49 .34 .38 .56 .55 .56 .60 .58 7 TW15A 1849 2003 .63 .62 .59 .59 .70 .75 .76 8 TW21A 1831 2003 .54 .44 .33B .40B .61 .81 .78 9 TW241A 1817 2003 .27B .33 .40 .44 .49 .63 .78 .79 10 TW25A 1775 2003 .20B .42 .65 .78 .74 .76 .60 .49 .51 11 TW27B 1723 2003 .64 .64 .69 .59 .47 .63 .65 .53 .55 .55 .41 .45 12 TW41A 1891 2002 .60 .58 .65 .72 .75 13 TW43A 1873 2003 .11B .15A .46 .69 .74 .73 14 TW471A 1704 2003 .74 .77 .79 .72 .56 .63 .64 .57 .62 .67 .61 .62 15 TW47B 1703 1998 .60 .69 .77 .71 .60 .66 .67 .58 .58 .49 .21A 16 TW472B 1795 1973 .33A .44 .51 .47 .44 .37 .37 17 TW473B 1689 2001 .61 .63 .72 .79 .74 .60 .59 .65 .73 .75 .64 .38 .41 18 TW48A 1853 2003 .47 .40 .60 .73 .71 .75 19 TW49A 1826 2003 .52 .69 .69 .67 .63 .70 .72 20 TW62A 1844 2003 .29A .40 .36 .54 .64 .71 .77 21 TW64A 1805 2002 .47 .51 .55 .48 .55 .57 .66 .68 22 TW65A 1769 2003 .44 .49 .35 .48 .58 .58 .67 .64 .65 .60 23 TW81A 1725 2002 .49 .41 .62 .39 .26A .39 .57 .72 .50 .43 .45 24 TW821A 1694 2002 .33 .31A .42 .72 .62 .47 .53 .47 .42 .63 .65 .51 .51 25 TW821B 1694 2002 .32A .24A .37 .81 .69 .48 .48 .55 .62 .56 .50 .65 .64 26 TW822A 1706 2002 .50 .67 .80 .77 .51 .52 .46 .34 .48 .55 .54 .53 27 TW822B 1706 1997 .45 .41B .52B .57 .38 .46 .55 .54 .55 .47 .53 28 TW83SW 1681 2003 .40 .57 .57 .61 .59 .24A .00B .03B .38 .54 .54 .60 .61 29 TW832b 1685 1966 .42 .41 .56 .73 .48 .14B .22A .50 .50 .43 .49 30 TW84A 1600 1809 .65 .65 .41 .59 .51 .41 .28A 31 TW85 1668 1800 .36 .36 .69 .67 .66 .65 32 TW86A 1864 2003 .52 .65 .59 .45 .59 .79 33 TW88A 1691 2003 .56 .56 .47 .53 .55 .26B .21B .34 .52 .57 .54 .63 .65 34 TW901A 1801 2003 .61 .57 .56 .67 .71 .66 .71 .73 35 TW901B 1801 2003 .62 .54 .48 .57 .63 .73 .79 .80 36 TW902A 1806 2003 .59 .73 .57 .48 .58 .71 .79 .78 37 TW902B 1806 2002 .42 .59 .68 .61 .63 .61 .67 .69 38 TW91 1713 2002 .51 .54 .52 .48 .42 .41 .35 .33A .44 .53 .69 .68 39 TW92A 1810 2003 .63 .73 .67 .59 .69 .77 .77 .81 40 TW95A 1711 1876 .42 .51 .48 .41 .53 .50 .52 Av segment correlation .71 .61 .47 .53 .57 .61 .54 .46 .50 .52 .52 .58 .60 .63 .67 PART 7: DESCRIPTIVE STATISTICS: Lower Twin Lake 10:44 Thu 25 Oct 2007 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 TW01A 1647 1739 93 4 0 .652 .43 .90 .174 .659 .255 2.59 .416 -.039 1 2 TW03A 1650 1730 81 3 0 .617 .83 1.40 .249 .659 .208 2.54 .390 -.014 1 3 TW04B 1705 1848 144 5 3 .374 .28 .88 .159 .838 .205 2.88 .508 -.055 1 4 TW05 1699 1875 177 8 0 .635 .41 .96 .150 .728 .214 2.65 .455 -.048 1 5 TW08 1820 2002 183 8 0 .703 .53 2.13 .352 .901 .199 2.71 .427 -.072 1 6 TW11SW 1749 2002 254 11 0 .500 .36 1.37 .222 .883 .240 2.65 .362 -.035 2 7 TW15A 1849 2003 155 7 0 .653 .47 1.01 .168 .668 .236 2.72 .419 -.043 1 8 TW21A 1831 2003 173 7 2 .558 .34 .84 .150 .850 .192 2.88 .510 .019 1 9 TW241A 1817 2003 187 8 1 .522 .50 1.11 .175 .761 .197 2.72 .432 -.011 1 10 TW25A 1775 2003 229 9 1 .551 .41 .94 .146 .816 .157 2.81 .458 -.048 1 11 TW27B 1723 2003 281 12 0 .546 .35 1.37 .224 .928 .170 2.73 .454 -.051 1 12 TW41A 1891 2002 112 5 0 .666 .42 .95 .194 .799 .187 2.76 .506 .037 1 13 TW43A 1873 2003 131 6 2 .502 .38 1.00 .155 .589 .251 2.71 .521 .014 1 14 TW471A 1704 2003 300 12 0 .650 .37 .96 .163 .790 .214 2.68 .352 -.041 1 15 TW47B 1703 1998 296 11 1 .525 .24 1.15 .156 .857 .246 2.76 .402 -.071 1 16 TW472B 1795 1973 179 7 1 .390 .37 1.04 .194 .824 .187 2.63 .381 -.082 1 17 TW473B 1689 2001 313 13 0 .630 .23 .66 .100 .721 .257 2.70 .445 .003 1 18 TW48A 1853 2003 151 6 0 .605 .57 1.09 .186 .562 .243 2.44 .353 -.059 1 19 TW49A 1826 2003 178 7 0 .635 .41 1.29 .182 .712 .214 2.78 .428 -.010 1 20 TW62A 1844 2003 160 7 1 .530 .38 1.00 .166 .763 .230 2.78 .376 -.042 1 21 TW64A 1805 2002 198 8 0 .577 .25 .51 .082 .749 .185 2.64 .398 .012 1 22 TW65A 1769 2003 235 10 0 .561 .30 .66 .129 .877 .195 2.63 .416 -.011 1 23 TW81A 1725 2002 278 11 1 .488 .22 .82 .131 .846 .247 2.61 .381 .022 1 24 TW821A 1694 2002 309 13 1 .516 .29 .74 .110 .827 .170 2.69 .401 -.041 4 25 TW821B 1694 2002 309 13 2 .559 .38 .96 .189 .880 .178 2.55 .347 -.016 1 26 TW822A 1706 2002 297 12 0 .540 .30 .84 .142 .872 .165 2.67 .353 -.021 1 27 TW822B 1706 1997 292 11 2 .494 .36 1.06 .199 .872 .183 2.94 .352 -.060 1 28 TW83SW 1681 2003 323 13 3 .398 .19 1.05 .179 .941 .210 2.63 .290 -.052 1 29 TW832b 1685 1966 282 11 2 .427 .25 .81 .149 .845 .216 2.74 .353 -.049 1 30 TW84A 1600 1809 210 7 1 .527 .22 .50 .112 .843 .234 2.60 .387 -.007 4 31 TW85 1668 1800 133 6 0 .511 .89 2.06 .385 .882 .160 2.97 .463 -.063 1 32 TW86A 1864 2003 140 6 0 .575 .53 1.08 .215 .896 .144 2.72 .408 -.047 1 33 TW88A 1691 2003 313 13 2 .507 .21 .68 .096 .773 .211 2.77 .453 -.007 3 34 TW901A 1801 2003 203 8 0 .651 .44 1.17 .180 .862 .162 2.87 .490 .032 1 35 TW901B 1801 2003 203 8 0 .638 .32 1.37 .191 .887 .180 2.68 .349 -.002 1 36 TW902A 1806 2003 198 8 0 .657 .39 1.07 .177 .824 .179 2.84 .458 -.008 1 37 TW902B 1806 2002 197 8 0 .618 .34 .99 .153 .837 .172 2.73 .396 -.063 1 38 TW91 1713 2002 290 12 1 .482 .55 1.10 .149 .700 .161 2.76 .397 -.013 1 39 TW92A 1810 2003 194 8 0 .699 .57 1.21 .187 .513 .251 2.69 .467 -.045 2 40 TW95A 1711 1876 166 7 0 .460 .42 1.43 .200 .630 .251 2.97 .499 .049 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 8547 349 27 .551 .37 2.13 .169 .805 .203 2.97 .408 -.027