Grewingk Glacier, Alaska - AK017 Additional Site Information Greg Wiles and 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Earth Observatory Reference: Wiles, G. C., 1992, Holocene glacial fluctuations in the southern Kenai Mountains, Alaska: Unpublished Ph.D.thesis, University at Buffalo. COFECHA output: Chronology file name : AK017.CRN Measurement file name : AK017.RWL Date checked : 10MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1719 Ending year : 1988 Principal investigators: Greg Wiles, Parker E. Calkin Site name : Grewingk Glacier Site location : Alaska Species information : PCSI SITKA SPRUCE Latitude : 5937 Longitude : -15109 Elevation : 20M Series intercorrelation: 0.463 Avg mean sensitivity : 0.209 Avg standard deviation : 0.552 Avg autocorrelation : 0.857 Number dated series : 17 Segment length tested : 50 Number problem segments: 21 Pct problem segments : 15.33 PART 5: CORRELATION OF SERIES BY SEGMENTS: ak017.rwl 13:32 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 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 GB01SE 1785 1988 .45 .56 .37 .34 .52 .47 .57 .63 2 GB01NE 1814 1988 .60 .42 .39 .52 .59 .68 .75 3 GB01NW 1808 1988 .64 .41 .32A .49 .56 .62 .58 4 GB02SW 1800 1988 .32A .48 .61 .36 .23B .36B .53 5 GB03SW 1837 1988 .55 .62 .53 .44 .43 .44 6 GB06SE 1792 1988 .37 .51 .46 .61 .71 .49 .40 .40 7 GB07SW 1737 1988 .44 .57 .51 .69 .74 .54 .39 .32A .67 .71 8 GB07NW 1747 1988 .45 .44 .59 .64 .67 .65 .48 .12B .32A .53 9 GB07SE 1738 1988 .34B .36B .52 .62 .62 .55 .55 .41 .46 .43 10 GB08NW 1839 1988 .35 .48 .37 .42 .58 .57 11 GB08SE 1812 1988 .48 .67 .62 .62 .44 .49 .51 12 GB08NE 1770 1988 .28A .34 .52 .62 .65 .63 .40 .28A .48 13 GB09SE 1719 1988 .20B .47 .64 .63 .56 .55 .47 -.09B .02B .25A 14 GB09SW 1755 1988 .46 .39 .54 .55 .52 .46 .34 .45 .58 15 GB13NW 1810 1988 .44 .39 .40 .36 .27B .29B .38 16 GB16NW 1802 1988 .41 .49 .55 .55 .22B .12B .18A 17 GB23SE 1762 1988 .61 .62 .50 .43 .42 .23B .35 .47 .48 Av segment correlation .36 .46 .49 .54 .52 .52 .48 .35 .42 .50 PART 7: DESCRIPTIVE STATISTICS: ak017.rwl 13:32 Thu 10 Mar 2005 Page 6 ------------------------------------------------------------------------------------------------------------------------------------ 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 GB01SE 1785 1988 204 8 0 .497 1.50 3.00 .529 .842 .151 2.67 .369 -.076 1 2 GB01NE 1814 1988 175 7 0 .559 1.34 2.75 .535 .864 .152 2.69 .397 -.078 1 3 GB01NW 1808 1988 181 7 1 .503 1.89 4.12 .849 .870 .153 2.75 .469 -.016 1 4 GB02SW 1800 1988 189 7 3 .403 1.46 4.44 .814 .896 .167 2.62 .322 -.043 1 5 GB03SW 1837 1988 152 6 0 .485 1.40 3.18 .632 .873 .180 2.68 .381 .014 1 6 GB06SE 1792 1988 197 8 0 .479 1.09 3.05 .644 .913 .194 2.54 .370 -.014 1 7 GB07SW 1737 1988 252 10 1 .524 .85 2.20 .365 .801 .229 2.53 .321 -.051 1 8 GB07NW 1747 1988 242 10 2 .517 1.07 2.44 .398 .689 .232 2.71 .352 -.027 1 9 GB07SE 1738 1988 251 10 2 .468 .66 1.67 .289 .777 .250 2.55 .405 -.043 1 10 GB08NW 1839 1988 150 6 0 .477 1.46 3.48 .805 .901 .202 2.50 .337 -.052 2 11 GB08SE 1812 1988 177 7 0 .522 .74 1.80 .389 .869 .219 2.57 .385 -.062 1 12 GB08NE 1770 1988 219 9 2 .446 .51 1.64 .275 .855 .222 2.71 .402 -.027 1 13 GB09SE 1719 1988 270 10 4 .360 .58 1.94 .458 .925 .253 2.52 .296 -.081 1 14 GB09SW 1755 1988 234 9 0 .468 .85 3.14 .617 .924 .229 2.56 .316 -.040 1 15 GB13NW 1810 1988 179 7 2 .387 1.13 6.66 .842 .830 .220 2.61 .358 -.013 1 16 GB16NW 1802 1988 187 7 3 .317 1.11 2.58 .564 .875 .228 2.67 .363 -.014 1 17 GB23SE 1762 1988 227 9 1 .471 .95 4.05 .692 .913 .212 2.58 .356 -.082 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 3486 137 21 .463 1.05 6.66 .552 .857 .209 2.75 .362 -.043