Tebenkof Glacier, Alaska - AK025 Additional Site Information Greg Wiles, Parker E. Calkin Detrending Method: Negative exponontial or linear regression with negative or 0 slope Purpose of Collection: Climatology - temperature analyses Cores located at the Tree Ring Lab, Lamont-Doherty Earth Observatory Reference: Villalba, R., D'Arrigo, Cook, E.R., Wiles, G.C. and Jacoby, G.C., 1998, Decadal-scale variability along the extra-tropical western coast of the Americas over the past centuries inferred from tree-ring records: Interhemispheric Paleoclimates of the Americas, Pole-Equator-Pole transect 1 (PEP-1) PAGES-IGBP, Merida, Venezuela March 16-20, 1998. COFECHA output: Chronology file name : AK025.CRN Measurement file name : AK025.RWL Date checked : 10MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1450 Ending year : 1991 Principal investigators: Greg Wiles, Parker E. Calkin Site name : Tebenkof Glacier Site location : Alaska Species information : TSME MOUNTAIN HEMLOCK Latitude : 6045 Longitude : -14827 Elevation : 25M Series intercorrelation: 0.598 Avg mean sensitivity : 0.293 Avg standard deviation : 0.250 Avg autocorrelation : 0.735 Number dated series : 16 Segment length tested : 50 Number problem segments: 9 Pct problem segments : 5.23 PART 5: CORRELATION OF SERIES BY SEGMENTS: ak025.rwl 13:35 Thu 10 Mar 2005 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 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1524 1549 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 TB01NW 1450 1991 .30A .31B .33A .36 .53 .69 .76 .67 .71 .75 .68 .62 .68 .60 .57 .69 .57 .54 .70 .66 2 TB02NE 1670 1991 .75 .69 .70 .78 .58 .55 .59 .61 .69 .68 .67 .64 .64 3 TB02NW 1489 1644 .27A .32A .51 .58 .57 .15B 4 TB02NW 1669 1857 .78 .73 .64 .67 .76 .75 .65 .37 5 TB10NE 1601 1949 .70 .72 .76 .70 .48 .46 .51 .59 .75 .65 .62 .64 .60 6 TB13S1 1720 1991 .46 .50 .55 .54 .69 .75 .78 .81 .76 .69 .63 7 TB13S2 1749 1991 .72 .70 .66 .75 .77 .79 .76 .72 .71 .64 8 TB14SW 1660 1899 .66 .77 .76 .68 .58 .57 .73 .65 .58 9 TB16NW 1734 1991 .63 .58 .38 .43 .69 .71 .64 .62 .71 .56 10 TB18NE 1690 1858 .35B .49 .65 .39 .50 .53 .51 11 TB18SW 1523 1618 .48 .54 .65 .35B 12 TB18NW 1534 1989 .69 .78 .71 .64 .63 .64 .53 .41B .48 .36 .39 .50 .56 .65 .68 .75 .61 .38 13 TB20NW 1628 1991 .64 .68 .82 .87 .80 .53 .50 .68 .63 .57 .72 .71 .77 .76 14 TB22NW 1729 1991 .74 .46 .51 .68 .67 .67 .71 .74 .73 .65 15 TB24NW 1800 1991 .58 .68 .63 .69 .57 .57 .63 16 TB9211 1696 1991 .61 .60 .55 .59 .49 .59 .81 .75 .67 .58 .61 .66 Av segment correlation .29 .37 .51 .59 .54 .55 .69 .71 .66 .62 .64 .55 .55 .63 .64 .68 .69 .66 .67 .62 PART 7: DESCRIPTIVE STATISTICS: ak025.rwl 13:35 Thu 10 Mar 2005 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 TB01NW 1450 1991 542 20 3 .565 .38 .80 .162 .824 .212 2.49 .307 -.003 8 2 TB02NE 1670 1991 322 13 0 .660 .67 2.17 .393 .790 .306 2.62 .356 .006 8 3 TB02NW 1489 1644 156 6 3 .327 .58 1.23 .244 .539 .337 2.64 .410 -.052 3 4 TB02NW 1669 1857 189 8 0 .595 .48 1.47 .275 .707 .353 2.68 .474 -.021 1 5 TB10NE 1601 1949 349 13 0 .631 .64 2.29 .318 .773 .279 2.45 .265 -.001 3 6 TB13S1 1720 1991 272 11 0 .638 .47 1.22 .225 .688 .318 2.68 .296 .011 1 7 TB13S2 1749 1991 243 10 0 .720 .51 1.40 .208 .624 .303 2.55 .353 .041 1 8 TB14SW 1660 1899 240 9 0 .664 .48 1.66 .286 .834 .296 2.46 .315 -.020 6 9 TB16NW 1734 1991 258 10 0 .542 .49 1.26 .261 .830 .268 2.75 .356 -.009 3 10 TB18NE 1690 1858 169 7 1 .490 .44 1.27 .274 .790 .320 2.73 .441 .006 2 11 TB18SW 1523 1618 96 4 1 .387 .63 1.54 .325 .765 .344 2.54 .418 -.010 1 12 TB18NW 1534 1989 456 18 1 .550 .47 1.69 .272 .742 .307 2.98 .351 .008 2 13 TB20NW 1628 1991 364 14 0 .685 .47 1.69 .249 .706 .323 2.66 .459 .010 3 14 TB22NW 1729 1991 263 10 0 .641 .44 1.01 .154 .683 .234 2.45 .316 -.015 3 15 TB24NW 1800 1991 192 7 0 .590 .47 1.38 .209 .574 .314 2.60 .336 -.022 1 16 TB9211 1696 1991 296 12 0 .623 .45 1.14 .215 .701 .325 2.75 .428 .005 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 4407 172 9 .598 .49 2.29 .250 .735 .293 2.98 .358 -.001