Big Bend Lake, Alaska, USA - AK078 Additional Site Information Gordon Jacoby, Nicole Davi, and Greg Wiles Purpose of Collection: Climate analysis Measurement type: Ring Width and Maximum Density 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 : AK078.CRN Measurement file name : AK078.RWL Date checked : 12APR06 Checked by : B. Bauer Beginning year : 1557 Ending year : 1997 Principal investigators: Gordon Jacoby Nicole Davi Greg Wiles Site name : Big Bend Lake Site location : Alaska Species information : PCGL WHITE SPRUCE Latitude : +6120 Longitude : -14243 Elevation : 1040M Series intercorrelation: 0.526 Avg mean sensitivity : 0.206 Avg standard deviation : 0.141 Avg autocorrelation : 0.797 Number dated series : 20 Segment length tested : 50 Number problem segments: 23 Pct problem segments : 11.17 PART 5: CORRELATION OF SERIES BY SEGMENTS: Big Bend Lake RW 10:05 Wed 12 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 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 BL11NW.S 1760 1997 .21B .41 .53 .61 .66 .40 .36 .50 .46 2 BL17SE.S 1760 1997 .30B .24B .41 .54 .46 .63 .74 .59 .56 3 BL26NW 1661 1948 .51 .59 .30A .33 .44 .25B .42 .45 .60 .54 .38 4 BL27NX.S 1613 1997 .43 .47 .59 .59 .58 .58 .63 .47 .50 .68 .75 .74 .51 .54 .67 5 BL27N2X. 1655 1997 .41B .36B .30B .46 .45 .42 .59 .62 .64 .70 .65 .69 .73 6 BL27SE.S 1650 1997 .54 .72 .53 .31A .47 .50 .53 .50 .58 .68 .66 .65 .58 7 BL27S2.S 1681 1997 .61 .65 .52 .50 .35 .30A .35 .41 .60 .62 .63 .59 8 BL29.SEL 1660 1997 .82 .83 .80 .58 .55 .71 .70 .56 .62 .55 .48 .60 .68 9 BL29S.SE 1830 1997 .65 .66 .68 .67 .62 .60 10 BL29X.SE 1557 1997 .27A .10B .26A .61 .63 .63 .68 .68 .55 .61 .68 .66 .68 .73 .67 .68 11 BL31SWX. 1762 1997 .38 .38 .39 .47 .32A .50 .56 .42 .54 12 BL32SE.S 1790 1997 .40 .57 .66 .68 .62 .64 .57 .45 13 BL35E.SE 1740 1997 .67 .64 .44 .47 .52 .41 .59 .69 .75 .73 14 BL39SW.S 1850 1997 .44 .57 .53 .36 .38 15 BL40SW.S 1710 1997 .50 .50 .53 .42 .47 .57 .52 .49 .55 .57 .33 16 BL43NW.S 1832 1997 .57 .49 .35 .39 .46 .54 17 BL45NEX. 1593 1900 .40 .30A .26A .41 .52 .62 .68 .65 .48 .48 .56 .50 .54 18 BL54E.SE 1820 1997 .22B .19B .39B .48 .53 .63 .63 19 BL55SE.S 1800 1997 .27A .44 .50 .58 .62 .68 .60 20 BL67W.SE 1660 1997 .31B .28A .32B .57 .48 .48 .56 .58 .65 .64 .61 .71 .70 Av segment correlation .34 .28 .33 .53 .57 .52 .54 .49 .43 .47 .54 .55 .58 .58 .59 .58 PART 7: DESCRIPTIVE STATISTICS: Big Bend Lake RW 10:05 Wed 12 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 BL11NW.S 1760 1997 238 9 1 .458 .38 1.35 .190 .800 .257 2.81 .524 -.004 1 2 BL17SE.S 1760 1997 238 9 2 .514 .38 .98 .177 .828 .202 2.80 .449 -.032 3 3 BL26NW 1661 1948 288 11 2 .439 .25 .86 .130 .869 .194 2.59 .387 -.037 3 4 BL27NX.S 1613 1997 385 15 0 .577 .24 .56 .088 .723 .209 2.60 .301 .007 2 5 BL27N2X. 1655 1997 343 13 3 .553 .23 1.04 .107 .661 .214 2.92 .321 -.012 2 6 BL27SE.S 1650 1997 348 13 1 .555 .22 .87 .108 .743 .196 2.77 .333 .009 2 7 BL27S2.S 1681 1997 317 12 1 .502 .16 .97 .078 .799 .183 2.54 .363 -.010 1 8 BL29.SEL 1660 1997 338 13 0 .637 .19 .72 .149 .907 .243 2.48 .291 -.013 2 9 BL29S.SE 1830 1997 168 6 0 .652 .40 1.14 .145 .697 .199 2.80 .399 -.065 1 10 BL29X.SE 1557 1997 441 16 3 .568 .20 .71 .133 .889 .256 2.83 .459 -.026 2 11 BL31SWX. 1762 1997 236 9 1 .458 .37 1.38 .258 .921 .202 2.56 .447 -.049 1 12 BL32SE.S 1790 1997 208 8 0 .557 .48 1.28 .187 .757 .198 2.85 .478 -.030 1 13 BL35E.SE 1740 1997 258 10 0 .610 .30 .94 .138 .873 .167 2.55 .358 .003 2 14 BL39SW.S 1850 1997 148 5 0 .449 .62 1.13 .168 .810 .129 2.57 .368 .020 1 15 BL40SW.S 1710 1997 288 11 0 .459 .31 .96 .138 .761 .208 2.75 .354 -.005 1 16 BL43NW.S 1832 1997 166 6 0 .460 .52 1.17 .247 .863 .185 2.75 .281 -.019 1 17 BL45NEX. 1593 1900 308 13 2 .482 .20 .47 .081 .800 .198 2.58 .325 -.015 2 18 BL54E.SE 1820 1997 178 7 3 .468 .71 1.19 .212 .633 .205 2.54 .411 -.016 1 19 BL55SE.S 1800 1997 198 7 1 .476 .36 .76 .118 .706 .183 2.74 .428 -.038 2 20 BL67W.SE 1660 1997 338 13 3 .532 .30 1.06 .136 .812 .205 2.58 .316 -.017 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 5430 206 23 .526 .31 1.38 .141 .797 .206 2.92 .374 -.016