Hawkins Glacier, Alaska - ak097
Additional Site Information
Gordon Jacoby, Greg Wiles, and Nicole Davi
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 : AK097.CRN
Measurement file name : AK097.RWL
Date checked : 08SEP11
Checked by : B. Bauer
Beginning year : 1625
Ending year : 1998
Principal investigators: Gordon Jacoby Greg Wiles Nicole Davi
Site name : Hawkins Glacier
Site location : Alaska
Species information : PCGL WHITE SPRUCE
Latitude : 6108
Longitude : -14204
Elevation : 876M
Series intercorrelation: 0.607
Avg mean sensitivity : 0.238
Avg standard deviation : 0.210
Avg autocorrelation : 0.785
Number dated series : 25
Segment length tested : 50
Number problem segments: 18
Pct problem segments : 7.29
PART 5: CORRELATION OF SERIES BY SEGMENTS: Hawkins Glacier 16:00 Thu 08 Sep 2011 Page 5
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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 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950
1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999
--- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1 WR16A 1760 1998 .60 .64 .69 .66 .78 .81 .68 .59 .29A
2 WR21 1810 1998 .66 .76 .87 .89 .78 .73 .51
3 WR24 1731 1998 .32A .55 .72 .59 .42 .63 .61 .63 .65 .64
4 WR26 1770 1998 .78 .80 .68 .45 .61 .78 .78 .69 .60
5 WR28' 1714 1998 .27A .28A .41 .63 .57 .60 .79 .87 .84 .69 .61
6 WR30E 1687 1998 .68 .56 .41 .53 .75 .54 .60 .81 .80 .75 .75 .62
7 WR31' 1750 1950 .41 .58 .60 .62 .78 .82 .63 .58
8 WR32SW 1791 1998 .67 .74 .76 .86 .87 .82 .73 .56
9 WR33 1771 1998 .31A .41 .63 .75 .81 .82 .80 .73 .57
10 WR35 1811 1998 .62 .62 .83 .88 .80 .65 .69
11 WR35S 1801 1998 .52 .60 .82 .83 .82 .76 .68
12 WR35N 1801 1940 .62 .72 .84 .84 .84
13 WR35NW 1785 1998 .65 .63 .71 .86 .86 .80 .74 .52
14 WR40SW 1650 1998 .27B .19A .30A .42 .59 .67 .55 .46 .52 .49 .47 .42 .44
15 wr40N 1625 1998 .36 .61 .50 .50 .56 .67 .75 .57 .38 .43 .58 .67 .47 .33
16 wr40W 1733 1998 .57 .64 .84 .77 .60 .55 .59 .63 .46 .40
17 WR40W' 1660 1998 .57 .60 .56 .62 .73 .78 .74 .57 .61 .69 .67 .53 .50
18 WR65 1800 1998 .58 .64 .76 .79 .75 .71 .46
19 WR71 1733 1998 -.14B .03B .01B .24B .47 .68 .79 .72 .65 .71
20 WR76A 1711 1998 .47 .52 .46 .30B .30A .54 .61 .64 .70 .70 .63
21 WR76B 1800 1998 .37 .63 .62 .59 .62 .66 .53
22 WR76C 1691 1998 .23B .20B .40 .41 .22B .22A .53 .62 .64 .60 .59 .65
23 WR77A 1680 1998 .36 .72 .62 .61 .88 .76 .62 .78 .73 .47 .35 .34
24 WR77C 1636 1998 .52 .64 .71 .77 .71 .78 .82 .73 .65 .78 .72 .46 .40 .56
25 WR77B 1636 1998 .52 .56 .66 .74 .71 .77 .87 .68 .53 .76 .74 .64 .61 .49
Av segment correlation .47 .53 .49 .51 .46 .55 .63 .58 .60 .72 .75 .69 .62 .54
PART 7: DESCRIPTIVE STATISTICS: Hawkins Glacier 16:00 Thu 08 Sep 2011 Page 7
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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 WR16A 1760 1998 239 9 1 .590 .60 1.79 .393 .902 .258 2.45 .330 .007 1
2 WR21 1810 1998 189 7 0 .726 .67 1.40 .286 .777 .247 2.50 .325 .022 2
3 WR24 1731 1998 268 10 1 .556 .63 2.94 .505 .915 .217 2.61 .413 -.030 1
4 WR26 1770 1998 229 9 0 .673 .61 1.51 .374 .837 .265 2.76 .472 -.024 1
5 WR28' 1714 1998 285 11 2 .644 .36 .98 .136 .694 .232 2.71 .414 -.025 2
6 WR30E 1687 1998 312 12 0 .653 .68 1.65 .253 .654 .258 2.52 .310 -.021 1
7 WR31' 1750 1950 201 8 0 .613 .33 .66 .123 .647 .223 2.73 .447 -.070 1
8 WR32SW 1791 1998 208 8 0 .757 .49 1.25 .186 .519 .289 2.68 .405 -.028 1
9 WR33 1771 1998 228 9 1 .651 .55 1.56 .312 .803 .273 2.68 .405 -.006 2
10 WR35 1811 1998 188 7 0 .750 .40 1.02 .186 .603 .306 2.75 .398 -.032 1
11 WR35S 1801 1998 198 7 0 .715 .40 .88 .123 .647 .210 2.92 .500 .023 1
12 WR35N 1801 1940 140 5 0 .778 .56 1.52 .238 .739 .235 2.87 .473 -.036 1
13 WR35NW 1785 1998 214 8 0 .716 .57 1.19 .217 .563 .275 2.65 .390 -.028 1
14 WR40SW 1650 1998 349 13 3 .440 .32 .87 .176 .889 .212 2.64 .323 -.068 1
15 wr40N 1625 1998 374 14 0 .488 .21 .74 .140 .922 .214 2.67 .397 -.014 2
16 wr40W 1733 1998 266 10 0 .607 .25 .77 .134 .882 .213 2.62 .361 -.037 1
17 WR40W' 1660 1998 339 13 0 .626 .23 .65 .133 .872 .238 2.61 .322 -.001 1
18 WR65 1800 1998 199 7 0 .645 .66 1.18 .220 .577 .244 2.72 .442 -.012 1
19 WR71 1733 1998 266 10 4 .444 .54 1.55 .337 .827 .276 2.99 .559 -.006 2
20 WR76A 1711 1998 288 11 2 .532 .33 .88 .139 .703 .233 2.91 .390 -.001 1
21 WR76B 1800 1998 199 7 0 .546 .33 .72 .133 .782 .219 2.68 .405 -.004 2
22 WR76C 1691 1998 308 12 4 .457 .25 .70 .118 .792 .237 2.66 .324 -.025 1
23 WR77A 1680 1998 319 12 0 .590 .27 .83 .149 .874 .228 2.73 .399 -.034 1
24 WR77C 1636 1998 363 14 0 .647 .29 .77 .141 .838 .218 2.56 .293 -.045 1
25 WR77B 1636 1998 363 14 0 .658 .34 1.30 .223 .926 .206 2.65 .355 -.049 1
--- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- --
Total or mean: 6532 247 18 .607 .41 2.94 .210 .785 .238 2.99 .386 -.023