Silver Tip, Alaska, USA - AK071 Additional Site Information Gordon Jacoby, Nicole Davi, and Greg Wiles 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: Davi, N.K, Jacoby, G.C., Wiles, G.C., 2003. Boreal temperature variability inferred from maximum latewood density and tree-ring width data, Wrangell Mountain region, Alaska. Quaternary Research, Vol. 60, pp. 252-262. COFECHA output: Chronology file name : AK071.CRN Measurement file name : AK071.RWL Date checked : 10APR06 Checked by : B. Bauer Beginning year : 1517 Ending year : 1957 Principal investigators: Gordon Jacoby Nicole Davi Greg Wiles Site name : Silver Tip Site location : Alaska Species information : PCGL WHITE SPRUCE Latitude : +6234 Longitude : -14220 Elevation : 1030M Series intercorrelation: 0.611 Avg mean sensitivity : 0.194 Avg standard deviation : 0.179 Avg autocorrelation : 0.836 Number dated series : 22 Segment length tested : 50 Number problem segments: 8 Pct problem segments : 4.65 PART 5: CORRELATION OF SERIES BY SEGMENTS: Silver Tip 10:36 Mon 10 Apr 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 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 SD1'N 1532 1950 .48 .57 .53 .60 .64 .65 .74 .64 .63 .61 .61 .72 .76 .68 .61 .53 .51 2 SD1N 1555 1873 .64 .62 .65 .66 .62 .70 .76 .75 .64 .66 .81 .63 3 SD3E2 1689 1788 .83 .80 .75 .70 4 SD3W 1661 1779 .71 .71 .77 .69 .68 5 SD3W2 1692 1801 .67 .65 .66 .69 .70 6 SD3E 1661 1778 .70 .77 .79 .80 .79 7 SD4NE 1802 1933 .76 .80 .46 .38 .30A 8 SD5'NB 1517 1568 .24B 9 SD5'NA 1570 1707 .45 .58 .73 .76 .79 .83 10 SD5NX 1538 1754 .17B .23B .61 .71 .70 .74 .87 .75 .71 11 SD5N 1578 1762 .60 .64 .69 .76 .79 .73 .78 12 SD6RT 1801 1887 .56 .52 .43 13 SD7'N 1557 1848 .65 .64 .62 .68 .69 .73 .79 .80 .69 .65 .74 14 SD7'S 1556 1957 .31A .60 .63 .72 .76 .79 .78 .63 .51 .57 .61 .58 .51 .47 .50 .49 15 SD7N 1570 1957 .57 .64 .79 .81 .74 .66 .75 .77 .71 .65 .70 .73 .57 .47 .49 .52 16 SD7S 1568 1896 .47 .54 .60 .67 .69 .73 .79 .71 .56 .56 .75 .76 .70 17 SD8N 1783 1899 .64 .75 .64 .31A 18 SD8S 1784 1894 .56 .67 .71 .66 19 SD9NW 1717 1814 .44 .41 .45 .22B 20 SD9SE 1717 1816 .39 .42 .60 .68 21 SD10N 1580 1873 .62 .55 .64 .62 .32A .48 .67 .47 .49 .61 .53 22 SD10S 1580 1831 .65 .57 .54 .62 .43 .47 .62 .40 .52 .50 Av segment correlation .30 .49 .60 .64 .68 .70 .70 .67 .68 .61 .58 .68 .67 .54 .48 .45 .51 PART 7: DESCRIPTIVE STATISTICS: Silver Tip 10:36 Mon 10 Apr 2006 Page 8 ----------------------------------------------------------------------------------------------------------------------------------- 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 SD1'N 1532 1950 419 17 0 .596 .29 1.15 .167 .902 .197 2.74 .329 -.015 3 2 SD1N 1555 1873 319 12 0 .652 .33 1.29 .187 .894 .187 2.48 .260 -.031 1 3 SD3E2 1689 1788 100 4 0 .753 .43 .91 .196 .861 .176 2.56 .393 .021 1 4 SD3W 1661 1779 119 5 0 .699 .51 1.02 .188 .813 .185 2.63 .441 .006 1 5 SD3W2 1692 1801 110 5 0 .681 .55 .96 .163 .772 .160 2.57 .377 .028 1 6 SD3E 1661 1778 118 5 0 .741 .41 .88 .182 .850 .196 2.49 .396 .004 1 7 SD4NE 1802 1933 132 5 1 .541 .67 1.76 .325 .903 .167 2.56 .408 -.044 1 8 SD5'NB 1517 1568 52 1 1 .236 .44 1.12 .227 .849 .236 2.80 .551 -.023 1 9 SD5'NA 1570 1707 138 6 0 .675 .49 1.31 .168 .763 .186 2.63 .413 -.013 2 10 SD5NX 1538 1754 217 9 2 .574 .47 1.30 .190 .757 .219 2.75 .495 .002 1 11 SD5N 1578 1762 185 7 0 .702 .42 .89 .147 .725 .213 2.79 .542 -.029 1 12 SD6RT 1801 1887 87 3 0 .445 .54 1.25 .269 .911 .170 2.58 .427 -.019 1 13 SD7'N 1557 1848 292 11 0 .693 .33 1.41 .202 .901 .190 2.48 .312 -.002 1 14 SD7'S 1556 1957 402 16 1 .579 .30 1.30 .167 .872 .202 2.65 .402 .025 1 15 SD7N 1570 1957 388 16 0 .649 .27 1.05 .155 .876 .181 2.67 .329 .030 9 16 SD7S 1568 1896 329 13 0 .654 .27 .89 .164 .886 .200 2.54 .347 .006 2 17 SD8N 1783 1899 117 4 1 .553 .47 1.73 .275 .901 .153 2.85 .521 -.017 1 18 SD8S 1784 1894 111 4 0 .644 .47 1.34 .197 .819 .157 2.69 .418 -.009 1 19 SD9NW 1717 1814 98 4 1 .352 .76 2.00 .439 .786 .257 2.57 .456 .017 1 20 SD9SE 1717 1816 100 4 0 .530 .45 1.24 .261 .755 .223 2.79 .522 -.035 1 21 SD10N 1580 1873 294 11 1 .546 .18 .63 .083 .842 .188 2.72 .389 -.051 1 22 SD10S 1580 1831 252 10 0 .541 .19 .36 .054 .567 .214 2.76 .379 -.025 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 4379 172 8 .611 .36 2.00 .179 .836 .194 2.85 .387 -.006