Itkillik Upland, Alaska - AK164 Additional Site Information Daniel E. Ackerman, Daniel Griffin, Sarah E. Hobbie, Kelly Popham, Erin Jones, Jacques C. Finlay Measurement type: Total ring width Reference: Daniel E. Ackerman, Daniel Griffin, Sarah E. Hobbie, Kelly Popham, Erin Jones, Jacques C. Finlay. 2018. Uniform shrub growth response to June temperature across the North Slope of Alaska. Environmental Research Letters, Vol. 13 (4) 44013. DOI: 10.1088/1748-9326/aab326 Notes: Measurements in raw ring width (units = 0.01 mm). Samples were collected during the 2015 growing season, so the 2015 ring only represents partial growth for that year. Keywords: Arctic, tundra, shrub expansion Funding Sources: US National Science Foundation (455541, 1048361, 00039202), Bell Museum of Natural History Dayton Fund, Explorers Club Exploration Grant Fund, University of Minnesota Department of Ecology, Evolution, and Behavior Student Research Award. COFECHA output: Chronology file name : AK164.CRN Measurement file name : AK164.RWL Date checked : 01MAY18 Checked by : B. Bauer Beginning year : 1962 Ending year : 2015 Principal investigators: D.E.Ackerman D.Griffin S.E.Hobbie K.Popham E.Jones J.C. Finlay Site name : Itkillik Upland Site location : Alaska Species information : SAPC TEALEAF WILLOW Latitude : 6838 Longitude : -14937 Elevation : 739M Series intercorrelation: 0.547 Avg mean sensitivity : 0.403 Avg standard deviation : 0.130 Avg autocorrelation : 0.636 Number dated series : 31 Segment length tested : 50 Number problem segments: 6 Pct problem segments : 18.18 PART 5: CORRELATION OF SERIES BY SEGMENTS: Itkillik Upland 14:14 Tue 01 May 2018 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 1950 1975 2000 1999 2024 2049 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 ITU01 1991 2015 .34B 2 ITU02 1979 2015 .53 3 ITU04 1983 2015 .52 4 ITU06 1996 2015 .56 5 ITU08 1983 2015 .26B 6 ITU11 1983 2013 .75 7 ITU14 1962 2015 .54 .56 8 ITU15 1973 2015 .54 9 ITU16 2001 2015 .39B 10 ITU17 1995 2015 .29B 11 ITU18 1983 2015 .77 12 ITU19 2002 2015 .70 13 ITU20 1974 2015 .49 14 ITU21 1991 2015 .51 15 ITU22 1991 2015 .52 16 ITU23 1990 2015 .49 17 ITU24 2000 2015 .61 18 ITU25 1998 2015 .76 19 ITU26 1972 2015 .83 20 ITU27 1983 2015 .76 21 ITU29 1962 2015 .45 .47 22 ITU30 1991 2015 .57 23 ITU32 1974 2015 .47 24 ITU33 1992 2015 .34 25 ITU34 1975 2015 .67 26 ITU35 1990 2015 .76 27 ITU36 1993 2015 .17A 28 ITU37 1971 2015 .36B 29 ITU38 1990 2015 .49 30 ITU39 1987 2015 .69 31 ITU40 1995 2015 .81 Av segment correlation .53 .55 .56 PART 7: DESCRIPTIVE STATISTICS: Itkillik Upland 14:14 Tue 01 May 2018 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 ITU01 1991 2015 25 1 1 .336 .17 .48 .104 .623 .490 2.54 .550 -.062 1 2 ITU02 1979 2015 37 1 0 .527 .20 .47 .112 .490 .504 2.53 .503 -.081 1 3 ITU04 1983 2015 33 1 0 .524 .18 .42 .095 .602 .437 2.63 .658 -.096 2 4 ITU06 1996 2015 20 1 0 .562 .27 .78 .251 .871 .538 2.75 .688 .254 1 5 ITU08 1983 2015 33 1 1 .258 .19 .50 .139 .887 .299 2.45 .484 -.012 3 6 ITU11 1983 2013 31 1 0 .751 .25 .78 .180 .636 .519 2.54 .648 .019 1 7 ITU14 1962 2015 54 2 0 .552 .14 .35 .076 .609 .418 2.50 .491 -.079 1 8 ITU15 1973 2015 43 1 0 .540 .16 .34 .073 .539 .434 2.62 .602 -.069 1 9 ITU16 2001 2015 15 1 1 .386 .33 .55 .133 .151 .497 2.42 .612 -.071 2 10 ITU17 1995 2015 21 1 1 .291 .23 .70 .142 .725 .370 2.65 .594 -.018 2 11 ITU18 1983 2015 33 1 0 .766 .24 .55 .121 .641 .404 2.52 .562 -.050 1 12 ITU19 2002 2015 14 1 0 .698 .33 .63 .143 .599 .295 2.50 .606 -.050 1 13 ITU20 1974 2015 42 1 0 .495 .12 .29 .061 .624 .332 2.58 .500 -.139 1 14 ITU21 1991 2015 25 1 0 .514 .27 .66 .187 .945 .245 3.00 .635 -.105 1 15 ITU22 1991 2015 25 1 0 .525 .24 .56 .152 .891 .326 2.61 .677 .120 1 16 ITU23 1990 2015 26 1 0 .491 .24 .43 .107 .722 .326 2.57 .676 .067 1 17 ITU24 2000 2015 16 1 0 .607 .34 .61 .129 .339 .452 2.52 .626 .088 1 18 ITU25 1998 2015 18 1 0 .756 .24 .59 .189 .919 .398 2.67 .735 .128 1 19 ITU26 1972 2015 44 1 0 .830 .19 .33 .064 .063 .419 2.52 .496 -.039 1 20 ITU27 1983 2015 33 1 0 .756 .24 1.26 .255 .896 .395 2.69 .690 -.203 1 21 ITU29 1962 2015 54 2 0 .469 .19 .41 .091 .443 .388 2.60 .536 -.009 1 22 ITU30 1991 2015 25 1 0 .571 .28 .57 .182 .905 .313 2.71 .689 .176 1 23 ITU32 1974 2015 42 1 0 .465 .19 .80 .180 .845 .391 2.59 .550 -.042 1 24 ITU33 1992 2015 24 1 0 .338 .23 .56 .201 .957 .371 2.35 .517 .111 1 25 ITU34 1975 2015 41 1 0 .670 .21 .84 .193 .698 .452 2.79 .535 -.051 1 26 ITU35 1990 2015 26 1 0 .756 .19 .29 .056 -.004 .372 2.56 .620 -.083 1 27 ITU36 1993 2015 23 1 1 .169 .25 .53 .122 .601 .371 2.68 .588 .180 5 28 ITU37 1971 2015 45 1 1 .360 .13 .48 .116 .714 .463 2.77 .688 .087 2 29 ITU38 1990 2015 26 1 0 .494 .14 .40 .103 .749 .369 2.85 .691 .060 1 30 ITU39 1987 2015 29 1 0 .692 .20 .65 .141 .860 .286 2.59 .460 .019 1 31 ITU40 1995 2015 21 1 0 .805 .22 .53 .142 .389 .598 2.43 .583 -.091 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 944 33 6 .547 .21 1.26 .130 .636 .403 3.00 .585 -.014