Dalton Highway Mile Post 201, Alaska - AK084 Additional Site Information Andrea Lloyd and Chris Fastie Purpose of Collection: Ecology - age structure Cores are available at: Middlebury College, Middlebury VT Notes: Site is a mixed stand of black (PCMA) and white (PCGL) spruce that burned in 1900/1901. 1 mile north of site DH200. Stand is very open. This is the northernmost site along the Dalton Highway in Alaska that black spruce are found in any abundance. Reference: Lloyd et al. 2005. Population dynamics of black and white spruce near the arctic treeline in the southern Brooks Range, Alaska. Canadian Journal of Forest Research. 35(9):2073-2081 Chronology file name : AK084.CRN Measurement file name : AK084.RWL Date checked : 11DEC06 Checked by : B. Bauer Beginning year : 1912 Ending year : 2001 Principal investigators: Andrea Lloyd Chris Fastie Site name : Dalton Highway Mile Post 201 Site location : Alaska Species information : PCMA BLACK SPRUCE Latitude : 6734 Longitude : -14949 Elevation : 469M Series intercorrelation: 0.541 Avg mean sensitivity : 0.220 Avg standard deviation : 0.248 Avg autocorrelation : 0.841 Number dated series : 14 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 2.04 PART 5: CORRELATION OF SERIES BY SEGMENTS: DH201 16:35 Mon 11 Dec 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 1900 1925 1950 1975 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 201-282 1923 2001 .54 .51 .50 .52 2 201-329 1936 2001 .57 .50 .50 3 201-334 1918 2001 .49 .49 .51 .52 4 201-335 1922 2001 .39 .44 .56 .59 5 201-343 1926 2001 .33A .55 .56 6 201-350 1925 2001 .56 .60 .60 7 201-354 1914 2001 .67 .63 .68 .68 8 201-357 1912 2001 .68 .62 .57 .58 9 201-360 1919 2001 .49 .48 .56 .60 10 201-377 1938 2001 .75 .74 .75 11 201-406 1926 2001 .62 .67 .68 12 201-407 1915 2001 .58 .58 .65 .69 13 201-408 1927 2001 .47 .56 .53 14 201-410 1925 2001 .46 .40 .40 Av segment correlation .55 .54 .58 .58 PART 7: DESCRIPTIVE STATISTICS: DH201 16:35 Mon 11 Dec 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 () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 201-282 1923 2001 79 4 0 .534 .66 2.10 .421 .904 .231 2.89 .572 -.048 1 2 201-329 1936 2001 66 3 0 .555 .39 .67 .144 .780 .206 2.94 .656 -.035 1 3 201-334 1918 2001 84 4 0 .530 .39 .91 .238 .907 .211 2.38 .341 -.038 2 4 201-335 1922 2001 80 4 0 .436 .47 1.05 .241 .853 .232 2.83 .624 .021 1 5 201-343 1926 2001 76 3 1 .432 .57 1.28 .255 .813 .212 2.57 .501 -.016 1 6 201-350 1925 2001 77 3 0 .563 .47 .93 .211 .850 .206 2.71 .538 .001 1 7 201-354 1914 2001 88 4 0 .621 .34 .65 .124 .755 .198 2.55 .447 -.053 1 8 201-357 1912 2001 90 4 0 .609 .62 1.62 .423 .866 .247 2.60 .523 -.091 1 9 201-360 1919 2001 83 4 0 .510 .48 1.21 .259 .908 .172 2.91 .504 -.050 1 10 201-377 1938 2001 64 3 0 .716 .28 .61 .136 .764 .251 2.60 .476 -.072 1 11 201-406 1926 2001 76 3 0 .621 .41 .99 .214 .859 .222 2.65 .545 -.079 1 12 201-407 1915 2001 87 4 0 .603 .36 1.08 .233 .882 .256 2.69 .421 -.031 1 13 201-408 1927 2001 75 3 0 .490 .77 1.45 .288 .757 .194 2.61 .528 -.022 1 14 201-410 1925 2001 77 3 0 .357 .50 1.17 .239 .835 .245 2.61 .430 -.017 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1102 49 1 .541 .48 2.10 .248 .841 .220 2.94 .505 -.038