Echo Slope, Alaska, USA - AK063 Additional Site Information Rosanne D'Arrigo, Erika Mashig, David Frank, Rob Wilson and Gordon Jacoby. Purpose of Collection: Climate analysis Measurement type: Total ring width Location of core material: Tree-Ring Laboratory Lamont-Doherty Earth Observatory Palisades, New York 10964 Reference: D'Arrigo, R., E. Mashig, D. Frank, R. Wilson and G. Jacoby. 2005. Temperature Variability over the past millennium inferred from northwestern Alaska tree rings. Climate Dynamics 24: 227-236. doi:10.1007/s00382-004-0502-1. COFECHA output: Chronology file name : AK063.CRN Measurement file name : AK063.RWL Date checked : 13JAN06 Checked by : B. Bauer Beginning year : 1590 Ending year : 2002 Principal investigators: R. D'Arrigo E. Mashig D. Frank R. Wilson G. Jacoby Site name : Echo Slope Site location : Alaska Species information : PCGL WHITE SPRUCE Latitude : +6506 Longitude : -16209 Elevation : 229M Series intercorrelation: 0.639 Avg mean sensitivity : 0.216 Avg standard deviation : 0.291 Avg autocorrelation : 0.788 Number dated series : 38 Segment length tested : 50 Number problem segments: 29 Pct problem segments : 7.84 PART 5: CORRELATION OF SERIES BY SEGMENTS: Echo Slope 12:07 Fri 13 Jan 2006 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 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 ES01a 1624 1892 .53 .53 .49 .38 .34B .49 .53 .66 .55 .48 .51 2 ES01b 1599 1892 .21A .20B .54 .46 .57 .70 .71 .39B .29B .27B .36 .51 3 ES02a 1710 2002 .60 .70 .76 .67 .63 .75 .83 .83 .73 .68 .73 .68 4 ES02b 1627 2002 .15B .18A .26B .49 .78 .78 .82 .79 .76 .85 .86 .83 .77 .77 .73 5 ES03a 1804 2002 .29B .40 .56 .77 .83 .75 .60 .60 6 ES03b 1804 2002 .13B .26B .66 .83 .79 .71 .61 .62 7 ES04a 1746 2002 .75 .73 .83 .72 .68 .86 .81 .74 .59 .54 .52 8 ES04b 1727 1998 .33B .34B .69 .66 .59 .84 .87 .75 .61 .40 9 ES04c 1727 1996 .40B .35B .67 .71 .66 .82 .78 .63 .65 .54 10 ES05a 1652 1950 .44 .51 .73 .57B .46 .67 .60 .52 .53 .53 .51 .52 11 ES05b 1652 1950 .22B .38 .58 .70 .77 .77 .67 .58 .72 .75 .80 .80 12 ES06a 1737 1971 .76 .78 .74 .65 .72 .85 .78 .68 .58 13 ES06b 1713 1971 .69 .71 .71 .71 .69 .67 .64 .66 .65 .53 14 ES07a 1790 2002 .61 .70 .72 .69 .80 .87 .81 .79 .77 15 ES07b 1795 2002 .47 .51 .66 .74 .79 .80 .78 .78 .75 16 ES08 1789 2002 .56 .65 .68 .69 .72 .61 .53 .55 .55 17 ES09a 1791 1997 .49 .50 .59 .58 .72 .80 .67 .67 18 ES09b 1808 1997 .48 .46 .67 .74 .81 .76 .68 19 ES10a 1728 1997 .78 .86 .78 .59 .59 .61 .71 .84 .62 .35 20 ES10b 1750 1997 .74 .81 .76 .69 .65 .75 .73 .57 .70 21 ES11a 1840 2002 .38 .58 .72 .78 .71 .72 .70 22 ES11b 1840 2002 .37 .56 .65 .68 .72 .83 .82 23 ES12a 1893 2002 .81 .74 .81 .80 .81 24 ES12b 1893 1997 .82 .80 .75 .75 25 ES13a 1713 1997 .74 .78 .78 .71 .61 .30A .32A .66 .77 .52 .49 26 ES13b 1703 1997 .61 .74 .56 .41 .43 .33A .47 .66 .60 .51 .63 27 ES14a 1590 1890 .20B .20B .52 .50 .60 .78 .79 .75 .83 .75 .51 .54 28 ES14b 1618 1897 .53 .64 .49 .49 .72 .75 .67 .74 .69 .64 .66 29 ES16a 1796 2002 .11B .15B-.02B .32A .76 .84 .70 .71 .69 30 ES16b 1797 2002 .16B .24B .48 .79 .84 .84 .79 .76 .76 31 ES17a 1737 1958 .72 .63 .71 .64 .67 .86 .84 .77 .74 32 ES17b 1713 1958 .63 .58 .57 .67 .58 .63 .80 .79 .75 .72 33 ES18a 1766 1999 .74 .76 .74 .60 .76 .83 .69 .50 .56 34 ES18b 1698 1999 .65 .69 .88 .88 .77 .55 .52 .81 .80 .76 .78 .76 35 ES19a 1710 2001 .59 .65 .70 .67 .65 .67 .64 .75 .82 .78 .60 .59 36 ES19b 1711 2002 .70 .68 .76 .73 .43 .52 .79 .84 .69 .54 .58 .56 37 ES20a 1782 2002 .55 .64 .65 .76 .74 .63 .57 .55 .56 38 ES20b 1761 2002 .73 .78 .73 .62 .74 .80 .83 .69 .60 .63 Av segment correlation .20 .37 .48 .40 .48 .64 .68 .67 .64 .57 .55 .67 .76 .75 .67 .65 .67 PART 7: DESCRIPTIVE STATISTICS: Echo Slope 12:07 Fri 13 Jan 2006 Page 10 ----------------------------------------------------------------------------------------------------------------------------------- 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 ES01a 1624 1892 269 11 1 .486 .41 1.17 .192 .791 .203 2.69 .413 -.056 1 2 ES01b 1599 1892 294 12 5 .419 .45 1.84 .287 .879 .218 2.75 .395 -.057 1 3 ES02a 1710 2002 293 12 0 .711 .47 1.27 .206 .776 .218 2.45 .323 -.024 2 4 ES02b 1627 2002 376 15 3 .658 .50 1.49 .242 .790 .227 2.77 .384 -.015 1 5 ES03a 1804 2002 199 8 1 .581 .73 1.59 .312 .771 .234 2.68 .522 -.029 1 6 ES03b 1804 2002 199 8 2 .586 .58 1.17 .177 .601 .226 2.61 .379 -.013 1 7 ES04a 1746 2002 257 11 0 .715 .72 1.84 .407 .885 .221 2.53 .284 .004 1 8 ES04b 1727 1998 272 10 2 .599 .66 1.66 .373 .882 .234 2.55 .382 -.016 2 9 ES04c 1727 1996 270 10 2 .612 .66 1.63 .374 .874 .235 2.48 .310 -.019 2 10 ES05a 1652 1950 299 12 1 .539 .49 1.54 .265 .802 .257 2.68 .341 -.023 1 11 ES05b 1652 1950 299 12 1 .640 .62 1.82 .350 .866 .210 2.69 .366 -.015 2 12 ES06a 1737 1971 235 9 0 .708 .33 1.16 .214 .904 .213 2.67 .388 -.049 1 13 ES06b 1713 1971 259 10 0 .633 .30 .96 .225 .950 .211 2.59 .368 -.027 1 14 ES07a 1790 2002 213 9 0 .720 .72 1.87 .346 .753 .249 2.52 .335 -.027 1 15 ES07b 1795 2002 208 9 0 .710 .74 2.00 .337 .731 .242 2.59 .405 .032 1 16 ES08 1789 2002 214 9 0 .608 .78 1.62 .336 .838 .191 2.62 .394 -.021 1 17 ES09a 1791 1997 207 8 0 .652 .65 2.64 .344 .813 .210 2.58 .365 -.019 2 18 ES09b 1808 1997 190 7 0 .652 .68 1.71 .352 .852 .215 2.58 .325 -.011 2 19 ES10a 1728 1997 270 10 0 .651 .67 2.36 .284 .736 .233 2.75 .382 -.004 4 20 ES10b 1750 1997 248 9 0 .717 .67 1.90 .254 .539 .258 2.58 .334 -.031 1 21 ES11a 1840 2002 163 7 0 .682 .71 1.60 .220 .537 .230 2.40 .324 -.077 1 22 ES11b 1840 2002 163 7 0 .664 .70 1.41 .236 .601 .226 2.70 .407 -.048 1 23 ES12a 1893 2002 110 5 0 .802 1.17 2.15 .377 .657 .219 2.71 .414 -.051 1 24 ES12b 1893 1997 105 4 0 .782 1.06 2.03 .314 .419 .241 2.67 .577 -.004 2 25 ES13a 1713 1997 285 11 2 .600 .61 2.56 .439 .913 .189 2.50 .286 -.060 1 26 ES13b 1703 1997 295 11 1 .534 .61 2.71 .480 .896 .222 2.66 .337 -.012 1 27 ES14a 1590 1890 301 12 2 .547 .52 1.30 .187 .746 .174 2.78 .377 -.048 1 28 ES14b 1618 1897 280 11 0 .627 .53 1.16 .190 .782 .185 2.72 .432 -.022 1 29 ES16a 1796 2002 207 9 4 .544 .63 1.61 .185 .574 .201 2.53 .344 -.014 1 30 ES16b 1797 2002 206 9 2 .671 .65 1.04 .183 .615 .199 2.63 .426 -.043 1 31 ES17a 1737 1958 222 9 0 .753 .83 1.88 .359 .777 .237 2.59 .323 -.031 3 32 ES17b 1713 1958 246 10 0 .663 .82 2.54 .439 .880 .209 2.61 .328 -.037 1 33 ES18a 1766 1999 234 9 0 .690 .47 1.25 .180 .745 .229 2.57 .430 -.036 1 34 ES18b 1698 1999 302 12 0 .729 .51 1.30 .200 .770 .196 2.58 .357 -.030 2 35 ES19a 1710 2001 292 12 0 .669 .46 1.52 .281 .884 .230 2.61 .337 -.021 2 36 ES19b 1711 2002 292 12 0 .658 .47 1.83 .366 .948 .219 2.68 .371 .003 2 37 ES20a 1782 2002 221 9 0 .629 1.11 2.01 .316 .734 .165 2.46 .320 .012 2 38 ES20b 1761 2002 242 10 0 .717 .82 1.52 .241 .764 .159 2.48 .297 -.051 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 9237 370 29 .639 .62 2.71 .291 .788 .216 2.78 .366 -.026