Dalton Highway Mile Post 200, Alaska - AK083 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 DH199. Stand is very open. 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 : AK083.CRN Measurement file name : AK083.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 200 Site location : Alaska Species information : PCMA BLACK SPRUCE Latitude : 6733 Longitude : -14950 Elevation : 443M Series intercorrelation: 0.424 Avg mean sensitivity : 0.264 Avg standard deviation : 0.155 Avg autocorrelation : 0.745 Number dated series : 31 Segment length tested : 50 Number problem segments: 17 Pct problem segments : 15.45 PART 5: CORRELATION OF SERIES BY SEGMENTS: DH200 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 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 200-7 1914 2001 .35 .38 .46 .47 2 200-10 1917 2001 .32A .39 .50 .51 3 200-11 1912 2001 .36 .50 .48 .49 4 200-12 1914 2001 .38 .41 .39 .35 5 200-13 1917 2001 .48 .50 .51 .51 6 200-15 1926 2001 .70 .78 .77 7 200-16 1925 2001 .33 .46 .47 8 200-22 1943 2001 .65 .73 .74 9 200-26 1925 2001 .58 .58 .60 10 200-28 1916 2001 .35 .43 .58 .57 11 200-42 1935 2001 .42 .45 .48 12 200-43 1923 2001 .44 .40 .47 .47 13 200-47 1925 2001 .37 .41 .38 14 200-55 1917 2001 .42 .37 .33A .35 15 200-61 1942 2001 .22B .34 .35 16 200-66 1934 2001 .48 .54 .48 17 200-67 1927 2001 .12B .28A .26B 18 200-75 1923 2001 .41 .41 .35 .37 19 200-76 1918 2001 .56 .72 .55 .57 20 200-77 1921 2001 .14B .18B .31B .30A 21 200-81 1917 2001 .31A .33 .32A .34 22 200-83 1918 2001 .24A .42 .59 .62 23 200-92 1926 2001 .34 .32A .33 24 200-96 1939 2001 .43 .55 .57 25 200-97 1927 2001 .65 .64 .64 26 200-109 1920 2001 .59 .67 .69 .70 27 200-117 1929 2001 .26B .36 .38 28 200-118 1916 2001 .22B .47 .62 .59 29 200-126 1926 2001 .58 .53 .55 30 200-132 1920 2001 .49 .45 .48 .48 31 200-139 1915 2001 -.05B .46 .66 .68 Av segment correlation .35 .44 .49 .50 PART 7: DESCRIPTIVE STATISTICS: DH200 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 () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 200-7 1914 2001 88 4 0 .439 .20 .61 .100 .636 .284 2.68 .383 -.064 1 2 200-10 1917 2001 85 4 1 .437 .31 .98 .244 .935 .256 2.74 .445 -.032 1 3 200-11 1912 2001 90 4 0 .435 .52 1.16 .256 .854 .232 2.72 .517 -.020 1 4 200-12 1914 2001 88 4 0 .345 .33 .85 .158 .816 .230 2.68 .454 -.094 2 5 200-13 1917 2001 85 4 0 .467 .50 1.02 .227 .831 .239 2.69 .523 -.107 1 6 200-15 1926 2001 76 3 0 .698 .36 .80 .132 .684 .218 2.59 .447 -.066 1 7 200-16 1925 2001 77 3 0 .361 .20 .88 .184 .915 .283 3.17 .570 .054 1 8 200-22 1943 2001 59 3 0 .645 .51 .86 .155 .570 .226 2.42 .396 -.007 1 9 200-26 1925 2001 77 3 0 .518 .42 .69 .141 .698 .217 2.59 .456 -.042 1 10 200-28 1916 2001 86 4 0 .424 .36 .92 .241 .915 .219 2.58 .429 -.021 1 11 200-42 1935 2001 67 3 0 .448 .24 .99 .191 .890 .230 2.98 .600 -.018 2 12 200-43 1923 2001 79 4 0 .416 .17 .41 .073 .319 .377 3.03 .528 -.055 1 13 200-47 1925 2001 77 3 0 .350 .15 .53 .120 .886 .276 2.69 .415 .012 1 14 200-55 1917 2001 85 4 1 .364 .35 .72 .167 .859 .222 2.65 .573 .038 1 15 200-61 1942 2001 60 3 1 .277 .32 1.56 .305 .907 .249 2.88 .555 -.073 1 16 200-66 1934 2001 68 3 0 .411 .16 .39 .091 .759 .296 2.96 .534 .023 1 17 200-67 1927 2001 75 3 3 .180 .18 .72 .161 .922 .273 2.84 .571 .024 1 18 200-75 1923 2001 79 4 0 .384 .14 .36 .057 .672 .238 2.61 .392 .038 1 19 200-76 1918 2001 84 4 0 .553 .15 .55 .079 .762 .268 2.82 .476 .036 1 20 200-77 1921 2001 81 4 4 .185 .18 .51 .094 .650 .302 2.75 .434 -.069 1 21 200-81 1917 2001 85 4 2 .299 .12 .41 .094 .892 .274 2.89 .532 -.062 1 22 200-83 1918 2001 84 4 1 .488 .30 .64 .132 .568 .282 2.74 .517 -.076 1 23 200-92 1926 2001 76 3 1 .378 .13 .34 .067 .575 .357 2.78 .577 -.038 1 24 200-96 1939 2001 63 3 0 .474 .16 .38 .075 .544 .353 2.70 .467 -.016 1 25 200-97 1927 2001 75 3 0 .578 .39 .88 .197 .751 .272 2.54 .439 .023 1 26 200-109 1920 2001 82 4 0 .588 .54 1.33 .294 .789 .277 2.52 .460 -.010 1 27 200-117 1929 2001 73 3 1 .310 .24 .53 .091 .469 .287 2.77 .469 .111 1 28 200-118 1916 2001 86 4 1 .440 .47 1.21 .335 .932 .226 2.84 .436 .037 1 29 200-126 1926 2001 76 3 0 .507 .24 .42 .074 .478 .244 2.61 .493 -.044 1 30 200-132 1920 2001 82 4 0 .419 .42 .75 .156 .720 .247 2.68 .551 -.097 1 31 200-139 1915 2001 87 4 1 .364 .15 .55 .078 .778 .246 2.84 .456 .001 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2435 110 17 .424 .29 1.56 .155 .745 .264 3.17 .486 -.021