Great Nunatak, Alaska - ak107 Additional Site Information Greg Wiles, Rosanne D'Arrigo, and Gordon Jacoby Notes: Project Title "Synthesis of Three Decades of Research on Tree Growth in Northern Forests in relation to Global Climatic Change" COFECHA output: Chronology file name : AK107.CRN Measurement file name : AK107.RWL Date checked : 09SEP11 Checked by : B. Bauer Beginning year : 1410 Ending year : 2000 Principal investigators: Greg Wiles Rosanne D'Arrigo Gordon Jacoby Site name : Great Nunatak Site location : Alaska Species information : TSME MOUNTAIN HEMLOCK Latitude : 6105 Longitude : -14659 Elevation : 250M Series intercorrelation: 0.587 Avg mean sensitivity : 0.275 Avg standard deviation : 0.196 Avg autocorrelation : 0.814 Number dated series : 32 Segment length tested : 50 Number problem segments: 43 Pct problem segments : 8.96 PART 5: CORRELATION OF SERIES BY SEGMENTS: Great Nunatak 16:06 Fri 09 Sep 2011 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 GN08NW 1578 2000 .70 .73 .57 .33 .33B .58 .26B .19B .60 .65 .70 .69 .68 .67 .75 .76 2 GN08SE 1586 2000 .74 .62 .45 .41 .44 .63 .58 .61 .59 .65 .65 .61 .61 .55 .69 .73 3 GN12SE 1693 2000 .41B .26B .18B .27B .37 .48 .70 .75 .69 .65 .78 .61 4 GN14NE 1693 2000 .36B .34 .43 .36 .46 .50 .53 .64 .69 .58 .62 .78 5 GN14SW 1693 2000 .27A .22B .39 .38 .35 .47 .56 .74 .73 .58 .71 .75 6 GN15SW 1623 1998 .67 .66 .70 .76 .68 .52 .32A .44 .65 .74 .71 .68 .61 .56 .29A 7 GN15NE 1623 2000 .67 .74 .87 .76 .56 .66 .61 .58 .67 .70 .72 .75 .81 .82 .69 8 GN18SW 1672 2000 .72 .73 .72 .75 .66 .62 .71 .72 .73 .75 .74 .83 .75 9 GN18NE 1672 2000 .78 .79 .79 .62 .51 .56 .71 .73 .83 .84 .79 .80 .77 10 GN01SS 1547 1994 .43 .42 .63 .58 .56 .82 .85 .78 .65 .52 .60 .65 .59 .42 .23B .15B .29B .37B 11 GN01SE 1613 1997 .60 .66 .80 .85 .73 .58 .53 .64 .72 .62 .54 .46 .32A .53 .48 12 GN02NE 1592 1981 .56 .57 .48 .67 .63 .56 .52 .55 .58 .60 .56 .67 .64 .58 .67 .71 13 GN02NN 1580 2000 .51 .59 .57 .71 .74 .61 .37 .45 .67 .62 .60 .72 .66 .60 .71 .66 14 GN03NW 1580 1961 .79 .78 .69 .83 .84 .71 .72 .69 .58 .45 .56 .72 .70 .74 .85 15 GN03NE 1551 1990 .63 .85 .74 .65 .84 .84 .74 .77 .68 .62 .60 .67 .73 .65 .71 .59 .29A 16 GN04NW 1647 2000 .54 .68 .78 .66 .59 .59 .57 .57 .51 .60 .72 .63 .55 .56 17 GN04NN 1645 2000 .41 .68 .75 .64 .62 .67 .64 .60 .48 .59 .66 .62 .58 .44 18 GN05NE 1410 1988 .78 .78 .61 .58 .60 .50 .45 .65 .49 .34B .53 .52 .46 .47 .62 .67 .71 .69 .22B .09B 19 GN05NW 1475 1995 .78 .77 .64 .69 .79 .58 .31A .56 .63 .55 .64 .59 .43 .39 .50 .63 .62 .52 .68 .50 20 GN06NW 1622 2000 .68 .66 .77 .74 .52 .57 .47 .38 .35 .45 .57 .43 .23B .54 .70 21 GN06N 1630 2000 .78 .82 .45 .31B .56 .44 .27A .19B .49 .65 .55 .33 .52 .66 22 GN07SW 1580 2000 .50 .36 .45 .69 .66 .46 .44 .55 .53 .53 .63 .59 .47 .45 .57 .64 23 GN07SE 1577 2000 .67 .56 .50 .67 .64 .50 .61 .70 .57 .48 .38 .48 .69 .68 .66 .62 24 GN09SE 1709 2000 .57 .40 .58 .55 .58 .73 .88 .81 .66 .65 .60 25 GN09NW 1709 2000 .46 .30A .29B .54 .67 .68 .68 .73 .64 .43 .48 26 GN10S 1741 2000 .40 .48 .64 .61 .73 .87 .81 .70 .78 .82 27 GN10N 1741 2000 .23B .23B .60 .67 .72 .70 .68 .62 .61 .67 28 GN11NE 1658 2000 .69 .73 .70 .66 .29B .04B .13B .21B .47 .47 .40 .70 .75 29 GN16NW 1636 1982 .51 .79 .84 .63 .60 .53 .55 .68 .67 .69 .58 .53 .34 .45 30 GN16SE 1636 1998 .78 .81 .79 .67 .76 .35B-.03B-.07B .29B .65 .70 .62 .50 .22B 31 GN17NW 1701 2000 .57 .34 .26B .57 .42 .27A .12B .29B .52 .59 .38 32 GN19NE 1632 2000 .67 .62 .62 .72 .61 .63 .68 .71 .79 .83 .80 .62 .53 .58 Av segment correlation .78 .77 .56 .58 .67 .61 .58 .70 .66 .57 .53 .49 .51 .53 .59 .65 .64 .58 .61 .57 PART 5: CORRELATION OF SERIES BY SEGMENTS: Great Nunatak 16:06 Fri 09 Sep 2011 Page 6 ----------------------------------------------------------------------------------------------------------------------------------- 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 1975 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 GN08NW 1578 2000 .70 2 GN08SE 1586 2000 .72 3 GN12SE 1693 2000 .62 4 GN14NE 1693 2000 .78 5 GN14SW 1693 2000 .75 7 GN15NE 1623 2000 .69 8 GN18SW 1672 2000 .64 9 GN18NE 1672 2000 .77 13 GN02NN 1580 2000 .63 16 GN04NW 1647 2000 .50 17 GN04NN 1645 2000 .45 20 GN06NW 1622 2000 .66 21 GN06N 1630 2000 .67 22 GN07SW 1580 2000 .66 23 GN07SE 1577 2000 .64 24 GN09SE 1709 2000 .58 25 GN09NW 1709 2000 .48 26 GN10S 1741 2000 .74 27 GN10N 1741 2000 .67 28 GN11NE 1658 2000 .74 31 GN17NW 1701 2000 .40 32 GN19NE 1632 2000 .56 Av segment correlation .64 PART 7: DESCRIPTIVE STATISTICS: Great Nunatak 16:06 Fri 09 Sep 2011 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 GN08NW 1578 2000 423 17 3 .602 .37 1.02 .194 .852 .277 2.61 .346 -.008 2 2 GN08SE 1586 2000 415 17 0 .601 .28 .79 .157 .821 .320 2.52 .276 -.028 1 3 GN12SE 1693 2000 308 13 4 .530 .24 1.59 .158 .831 .278 2.53 .298 -.003 2 4 GN14NE 1693 2000 308 13 1 .549 .29 .81 .141 .822 .251 2.56 .395 -.043 2 5 GN14SW 1693 2000 308 13 2 .530 .34 .77 .134 .730 .239 2.58 .300 -.020 1 6 GN15SW 1623 1998 376 15 2 .644 .26 1.00 .188 .889 .297 2.53 .315 -.011 1 7 GN15NE 1623 2000 378 16 0 .687 .36 1.29 .238 .887 .225 2.78 .426 -.005 1 8 GN18SW 1672 2000 329 14 0 .699 .25 1.46 .159 .802 .278 2.64 .354 .012 2 9 GN18NE 1672 2000 329 14 0 .722 .28 1.49 .216 .882 .280 2.53 .347 .002 2 10 GN01SS 1547 1994 448 18 4 .523 .37 1.25 .209 .797 .299 2.69 .329 -.023 9 11 GN01SE 1613 1997 385 15 1 .589 .36 1.43 .218 .843 .287 2.66 .353 -.014 1 12 GN02NE 1592 1981 390 16 0 .588 .34 .92 .179 .781 .303 2.48 .280 -.044 1 13 GN02NN 1580 2000 421 17 0 .596 .31 .83 .149 .752 .277 2.58 .302 -.032 1 14 GN03NW 1580 1961 382 15 0 .709 .45 1.04 .191 .716 .277 2.77 .391 -.016 1 15 GN03NE 1551 1990 440 17 1 .643 .41 1.99 .256 .841 .306 2.72 .375 -.039 1 16 GN04NW 1647 2000 354 15 0 .587 .65 1.70 .326 .826 .248 2.41 .295 -.025 5 17 GN04NN 1645 2000 356 15 0 .566 .64 1.43 .302 .832 .240 2.52 .329 -.015 2 18 GN05NE 1410 1988 579 20 3 .542 .45 1.54 .225 .832 .249 2.66 .362 -.031 1 19 GN05NW 1475 1995 521 20 1 .577 .40 1.01 .185 .816 .240 2.55 .327 -.023 1 20 GN06NW 1622 2000 379 16 1 .533 .53 1.54 .276 .826 .265 2.70 .389 -.018 3 21 GN06N 1630 2000 371 15 3 .502 .51 1.51 .291 .827 .278 2.41 .268 -.004 1 22 GN07SW 1580 2000 421 17 0 .539 .24 .68 .124 .792 .287 2.66 .348 -.013 4 23 GN07SE 1577 2000 424 17 0 .605 .22 .84 .116 .757 .282 2.78 .351 -.024 4 24 GN09SE 1709 2000 292 12 0 .639 .30 .77 .128 .739 .269 2.61 .373 -.040 1 25 GN09NW 1709 2000 292 12 2 .576 .25 .68 .121 .771 .296 2.45 .319 -.052 2 26 GN10S 1741 2000 260 11 0 .682 .30 .78 .132 .737 .275 2.63 .411 -.022 1 27 GN10N 1741 2000 260 11 2 .599 .24 .59 .103 .724 .281 2.54 .373 -.031 1 28 GN11NE 1658 2000 343 14 4 .506 .39 1.24 .227 .811 .298 2.71 .414 .005 1 29 GN16NW 1636 1982 347 14 0 .562 .29 1.35 .198 .876 .281 2.52 .295 -.029 1 30 GN16SE 1636 1998 363 14 5 .497 .32 1.25 .225 .884 .306 2.53 .326 -.008 1 31 GN17NW 1701 2000 300 12 4 .424 .36 1.27 .230 .860 .280 2.60 .342 -.038 1 32 GN19NE 1632 2000 369 15 0 .670 .34 1.75 .193 .838 .228 2.59 .313 -.030 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 11871 480 43 .587 .36 1.99 .196 .814 .275 2.78 .341 -.021