Portage Lake, Alaska, USA - ak087 Additional Site Information Gregory Wiles, Will Driscoll, Rosanne D'Arrigo Measurement type: Total ring width Purpose of Collection: Climatology - temperature analyses Detrending: Negative exponential or linear regression of any slope Location of core material: The College of Wooster - Tree Ring Lab Wooster, OH 44691 Cores available upon request Reference: Driscoll, W., G.C. Wiles, R.D. D’Arrigo, and M. Wilmking. 2005. Divergent tree growth response to recent climatic warming, Lake Clark National Park and Preserve, Alaska. Geophysical Research Letters, vol. 32, L20703, doi:10.1029/2005GL024258. COFECHA output: Chronology file name : AK087.CRN Measurement file name : AK087.RWL Date checked : 06NOV07 Checked by : B. Bauer Beginning year : 1672 Ending year : 2003 Principal investigators: Gregory Wiles Will Driscoll Rosanne D'Arrigo Site name : Portage Lake Site location : Alaska Species information : PCGL WHITE SPRUCE Latitude : 6030 Longitude : -15353 Elevation : 580M Series intercorrelation: 0.538 Avg mean sensitivity : 0.223 Avg standard deviation : 0.209 Avg autocorrelation : 0.852 Number dated series : 51 Segment length tested : 50 Number problem segments: 28 Pct problem segments : 6.90 PART 5: CORRELATION OF SERIES BY SEGMENTS: Portage Lake 11:20 Tue 06 Nov 2007 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 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 PO01NE 1873 2003 .21B .22B .54 .39 .41 .46 2 PO01SW 1873 2003 .15B .16B .52 .50 .55 .58 3 PO01SE 1874 2003 .24A .25A .52 .46 .52 .58 4 PO01NW 1877 2003 .38 .57 .41 .44 .46 5 PO02SW 1900 2003 .54 .61 .61 .62 6 PO02NE 1900 2003 .52 .63 .61 .63 7 PO02NW 1892 2003 .61 .57 .58 .60 .62 8 PO02SE 1892 2003 .69 .63 .66 .62 .64 9 PO03NE 1811 1984 .58 .62 .40 .53 .72 .62 .66 10 PO03SW 1716 1967 .31A .39 .55 .58 .59 .45 .35 .63 .73 .65 11 PO05SW 1800 2003 .50 .51 .52 .39 .42 .71 .64 .63 12 PO05S 1790 2003 .40 .54 .71 .76 .63 .53 .50 .17B .15B 13 PO05NE 1800 2003 .44 .40 .37B .56 .67 .65 .70 .68 14 PO08SE 1695 2003 .38 .36 .39 .40 .58 .71 .63 .65 .68 .69 .56 .45 .38 15 PO09SE 1676 2003 .35 .45 .47 .21B .20B .54 .58 .40 .49 .62 .61 .67 .67 16 PO09NW 1676 2003 .30A .37 .45 .46 .46 .47 .40 .25B .46 .51 .52 .63 .61 17 PO11SS 1672 2003 .43 .42 .56 .60 .58 .58 .58 .50 .55 .59 .53 .66 .70 .74 18 PO11SW 1674 2003 .52 .51 .54 .53 .60 .64 .70 .58 .53 .62 .54 .55 .65 .66 19 PO11NE 1716 2003 .62 .67 .56 .58 .62 .56 .42 .36 .52 .63 .64 .64 20 PO12SW 1818 2003 .60 .50 .50 .41 .36 .56 .68 .70 21 PO13SE 1843 2003 .30A .46 .68 .81 .69 .65 .64 22 PO13SW 1722 2003 .41 .41 .45 .52 .65 .53 .50 .71 .78 .62 .56 .58 23 PO17NW 1864 2003 .32A .34 .29A .50 .65 .70 24 PO23NW 1805 2002 .51 .67 .57 .34 .33A .39 .49 .49 25 PO23SE 1805 1997 .55 .67 .52 .36 .38 .41 .41 26 PO25NW 1826 2003 .62 .53 .55 .72 .66 .62 .58 27 PO25N 1824 2003 .37 .37 .45 .51 .70 .76 .67 .66 28 PO25NN 1834 2003 .54 .57 .70 .72 .62 .65 .62 29 PO26NW 1819 2003 .48 .55 .61 .59 .71 .62 .63 .60 30 PO26SE 1819 2003 .52 .58 .64 .66 .77 .61 .56 .51 31 PO26SW 1797 1998 .29A .34 .59 .54 .57 .72 .71 .70 32 PO26NE 1797 2003 -.03B .06B .32B .50 .53 .68 .75 .85 .83 33 PO27SW 1780 1995 .50 .43 .21B .16B .38 .53 .59 .59 34 PO27NE 1780 2003 .56 .52 .32B .34 .33 .47 .66 .56 .53 35 PO27NE 1788 2003 .67 .52 .34B .34 .43 .55 .54 .60 .56 36 PO28SW 1799 2003 .36 .38 .63 .56 .50 .65 .64 .63 .61 37 PO28NE 1799 2002 .53 .55 .71 .55 .42 .62 .69 .53 .52 38 PO29SE 1840 2003 .60 .55 .53 .65 .69 .70 .70 39 PO29NW 1840 2003 .60 .51 .51 .70 .69 .66 .64 40 PO29NE 1799 2003 .36 .38 .61 .52 .49 .66 .46 .44 .44 41 PO29SW 1799 2003 .30A .32A .67 .65 .53 .64 .57 .57 .56 42 PO30NE 1844 2003 .56 .58 .61 .72 .59 .63 .66 43 PO30SW 1844 2003 .49 .54 .51 .63 .61 .64 .60 44 PO30NW 1842 2003 .60 .61 .64 .74 .70 .66 .63 45 PO31NN 1832 2003 .40 .58 .52 .41 .67 .69 .70 46 PO31NE 1859 2003 .71 .73 .70 .64 .64 .63 47 PO32NW 1927 2003 .48 .60 .63 48 PO34SE 1798 2003 .51 .67 .56 .44 .37 .49 .49 .49 .48 49 PO34SW 1817 2003 .75 .64 .39 .46 .59 .67 .70 .70 50 PO35SW 1866 1980 .51 .51 .70 .72 .71 51 POXX 1847 1981 .58 .59 .69 .67 .56 .50 Av segment correlation .47 .39 .45 .49 .48 .45 .51 .53 .48 .51 .60 .60 .60 .60 PART 7: DESCRIPTIVE STATISTICS: Portage Lake 11:20 Tue 06 Nov 2007 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 PO01NE 1873 2003 131 6 2 .385 .48 1.19 .228 .795 .223 2.62 .422 -.031 1 2 PO01SW 1873 2003 131 6 2 .424 .51 1.85 .377 .890 .270 2.74 .555 -.039 2 3 PO01SE 1874 2003 130 6 2 .411 .50 1.77 .388 .811 .283 2.45 .276 -.061 1 4 PO01NW 1877 2003 127 5 0 .452 .49 1.44 .266 .895 .215 2.62 .436 -.027 1 5 PO02SW 1900 2003 104 4 0 .582 .65 1.59 .338 .851 .239 2.79 .432 -.143 1 6 PO02NE 1900 2003 104 4 0 .582 .53 1.50 .264 .782 .241 2.70 .537 -.120 1 7 PO02NW 1892 2003 112 5 0 .609 .63 1.57 .321 .862 .223 2.38 .321 .005 1 8 PO02SE 1892 2003 112 5 0 .651 .50 1.45 .261 .816 .245 2.62 .436 .009 1 9 PO03NE 1811 1984 174 7 0 .588 .43 1.34 .197 .832 .195 2.64 .458 -.025 2 10 PO03SW 1716 1967 252 10 1 .524 .35 1.26 .200 .879 .199 2.68 .462 -.043 1 11 PO05SW 1800 2003 204 8 0 .518 .34 1.00 .173 .849 .213 2.56 .354 .003 1 12 PO05S 1790 2003 214 9 2 .476 .24 .74 .148 .873 .237 2.54 .374 -.051 1 13 PO05NE 1800 2003 204 8 1 .531 .35 .91 .203 .887 .214 2.73 .391 -.015 1 14 PO08SE 1695 2003 309 13 0 .521 .31 .88 .156 .828 .223 2.57 .323 -.013 1 15 PO09SE 1676 2003 328 13 2 .471 .24 .72 .156 .869 .236 2.70 .406 -.014 1 16 PO09NW 1676 2003 328 13 2 .434 .19 .77 .137 .894 .258 2.53 .329 -.040 1 17 PO11SS 1672 2003 332 14 0 .559 .21 .57 .099 .744 .256 2.55 .264 -.013 3 18 PO11SW 1674 2003 330 14 0 .579 .19 .55 .091 .750 .260 2.67 .350 .002 1 19 PO11NE 1716 2003 288 12 0 .564 .25 .79 .142 .825 .262 2.55 .350 -.017 1 20 PO12SW 1818 2003 186 8 0 .538 .59 1.36 .259 .793 .217 2.69 .455 -.023 1 21 PO13SE 1843 2003 161 7 1 .610 .42 1.08 .182 .830 .189 2.71 .433 -.028 1 22 PO13SW 1722 2003 282 12 0 .570 .27 .88 .137 .858 .201 2.64 .387 -.055 1 23 PO17NW 1864 2003 140 6 2 .470 .53 1.04 .209 .841 .166 2.97 .497 -.045 1 24 PO23NW 1805 2002 198 8 1 .447 .31 1.24 .221 .884 .226 2.75 .348 -.033 2 25 PO23SE 1805 1997 193 7 0 .450 .31 .70 .134 .786 .220 2.58 .354 -.018 1 26 PO25NW 1826 2003 178 7 0 .599 .35 .88 .193 .885 .208 2.60 .348 -.058 1 27 PO25N 1824 2003 180 8 0 .523 .31 1.07 .178 .866 .228 2.77 .431 -.034 1 28 PO25NN 1834 2003 170 7 0 .621 .27 .70 .145 .856 .220 2.89 .464 -.036 1 29 PO26NW 1819 2003 185 8 0 .589 .40 .89 .152 .837 .181 2.79 .485 .015 1 30 PO26SE 1819 2003 185 8 0 .604 .40 .86 .151 .841 .183 2.79 .443 -.022 1 31 PO26SW 1797 1998 202 8 1 .567 .41 1.05 .176 .817 .203 2.70 .377 -.017 1 32 PO26NE 1797 2003 207 9 3 .518 .39 1.47 .221 .857 .218 2.67 .451 -.001 1 33 PO27SW 1780 1995 216 8 2 .455 .24 .82 .120 .831 .220 2.66 .416 .018 1 34 PO27NE 1780 2003 224 9 1 .476 .23 1.05 .133 .816 .243 2.76 .398 -.042 1 35 PO27NE 1788 2003 216 9 1 .507 .24 .86 .143 .853 .232 2.68 .430 -.030 1 36 PO28SW 1799 2003 205 9 0 .553 .36 1.39 .239 .889 .234 2.52 .321 -.015 2 37 PO28NE 1799 2002 204 9 0 .549 .26 .76 .137 .801 .244 2.69 .491 -.002 3 38 PO29SE 1840 2003 164 7 0 .627 .30 .83 .161 .879 .211 2.57 .415 -.066 1 39 PO29NW 1840 2003 164 7 0 .618 .36 1.26 .215 .860 .227 2.93 .516 -.011 2 40 PO29NE 1799 2003 205 9 0 .502 .37 1.22 .198 .862 .196 2.56 .348 -.039 2 41 PO29SW 1799 2003 205 9 2 .560 .31 .97 .193 .893 .212 2.63 .444 -.016 1 42 PO30NE 1844 2003 160 7 0 .620 .69 2.61 .491 .949 .178 2.85 .428 -.078 1 43 PO30SW 1844 2003 160 7 0 .581 .46 2.16 .418 .955 .224 2.63 .437 -.030 1 44 PO30NW 1842 2003 162 7 0 .654 .46 2.25 .436 .954 .236 2.62 .435 -.050 1 45 PO31NN 1832 2003 172 7 0 .534 .36 1.27 .242 .885 .234 2.52 .344 -.011 3 46 PO31NE 1859 2003 145 6 0 .674 .39 1.73 .298 .885 .221 2.73 .434 -.035 1 47 PO32NW 1927 2003 77 3 0 .577 .94 3.12 .701 .871 .254 2.58 .520 .008 1 48 PO34SE 1798 2003 206 9 0 .481 .42 1.60 .328 .918 .190 2.69 .412 -.094 1 PART 7: DESCRIPTIVE STATISTICS: Portage Lake 11:20 Tue 06 Nov 2007 Page 11 ----------------------------------------------------------------------------------------------------------------------------------- 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 () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 49 PO34SW 1817 2003 187 8 0 .578 .52 1.89 .425 .933 .176 2.60 .391 -.070 1 50 PO35SW 1866 1980 115 5 0 .617 .38 .87 .172 .816 .225 2.72 .523 -.013 1 51 POXX 1847 1981 135 6 0 .554 .40 1.53 .217 .860 .224 2.62 .475 -.024 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 9703 406 28 .538 .36 3.12 .209 .852 .223 2.97 .403 -.029