Two Medicine Lake, Montana - mt123 Additional Information Pederson Graumlich Littell Peters Waggoner Purpose of Collection: Climatology - Snowpack reconstruction Reference: Pederson, G.T., S.T. Gray, C.A. Woodhouse, J.L. Betancourt, D.B. Fagre, J.S. Littell, E. Watson, B.H. Luckman, and L.J. Graumlich. 2011. The unusual nature of recent snowpack declines in the North American Cordillera. Sciencexpress, Published online 9 June 2011. DOI: 10.1126/science.1201570 COFECHA output: Chronology file name : MT123.CRN Measurement file name : MT123.RWL Date checked : 07JUN11 Checked by : B. Bauer Beginning year : 1564 Ending year : 2001 Principal investigators: Pederson Graumlich Littell Peters Waggoner Site name : Two Medicine Lake Site location : Montana Species information : PSME DOUGLAS-FIR Latitude : 4829 Longitude : -11322 Elevation : 1636M Series intercorrelation: 0.637 Avg mean sensitivity : 0.248 Avg standard deviation : 0.522 Avg autocorrelation : 0.737 Number dated series : 51 Segment length tested : 50 Number problem segments: 4 Pct problem segments : 0.87 PART 5: CORRELATION OF SERIES BY SEGMENTS: Two Medicine Lake 16:49 Tue 07 Jun 2011 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 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 TML306B 1913 2001 .62 .60 .60 .60 2 TML301A 1912 1999 .74 .64 .52 3 TML006A 1896 2001 .60 .52 .75 .78 .78 4 TML104B 1883 2001 .67 .57 .74 .81 .84 5 TML008A 1880 2001 .68 .61 .70 .78 .79 6 TLM301B 1879 1999 .63 .61 .70 .67 7 TML007A 1876 2001 .62 .54 .61 .64 .67 8 TML108A 1860 2001 .62 .49 .48 .76 .71 .73 9 TML111A 1849 2001 .71 .73 .71 .70 .65 .49 .52 10 TML108B 1847 2001 .71 .76 .77 .66 .69 .57 .59 11 TML313A 1841 2001 .48 .53 .76 .66 .63 .71 .71 12 TML102B 1840 2001 .63 .66 .61 .69 .61 .60 .62 13 TML112B 1840 2001 .44 .50 .47 .56 .56 .59 .61 14 TML201A 1830 2001 .23B .42 .54 .58 .57 .57 .61 15 TML105B 1830 2001 .66 .72 .75 .74 .86 .78 .81 16 tml112a 1820 2001 .55 .59 .76 .76 .73 .76 .68 .68 17 TML104A 1820 2001 .52 .52 .63 .78 .60 .70 .76 .78 18 TML013A 1817 2001 .59 .74 .75 .72 .71 .69 .68 .67 19 TML206A 1810 2001 .64 .73 .65 .59 .59 .58 .64 .66 20 TML012A 1806 2001 .55 .63 .60 .59 .64 .77 .68 .68 21 TML105A 1806 2001 .51 .54 .66 .73 .70 .80 .77 .78 22 TML010A 1805 2001 .73 .75 .67 .70 .76 .69 .60 .59 23 TML109A 1790 2001 .60 .57 .53 .56 .59 .50 .63 .64 .67 24 TML214A 1790 2001 .57 .66 .60 .62 .79 .69 .69 .68 .70 25 TML002A 1789 2001 .35 .41 .55 .60 .67 .82 .80 .79 .79 26 TML215B 1784 2001 .49 .57 .59 .46 .56 .65 .63 .56 .58 27 TML215A 1782 2001 .70 .70 .67 .50 .56 .67 .81 .73 .73 28 TML010B 1780 2001 .67 .73 .71 .63 .70 .79 .84 .74 .75 29 TML214B 1773 1939 .49 .50 .59 .58 .65 .71 .69 30 TML002B 1768 2001 .43 .44 .43 .62 .65 .70 .79 .83 .84 .84 31 TML313B 1750 2001 .58 .68 .65 .55 .57 .76 .61 .59 .67 .70 32 TML110B 1743 1908 .72 .72 .62 .62 .58 .53 .57 33 TML202B 1732 2001 .50 .50 .64 .64 .69 .71 .65 .42 .45 .48 .45 34 TML312B 1730 1999 .33A .45 .72 .74 .68 .61 .73 .78 .66 .48 35 TML001A 1713 2001 .78 .79 .77 .69 .65 .58 .52 .58 .69 .69 .61 .63 36 TML009B 1710 2001 .59 .53 .71 .77 .67 .62 .50 .57 .75 .75 .56 .57 37 TML102A 1710 2001 .72 .71 .73 .66 .67 .83 .76 .66 .65 .79 .81 .80 38 TML204A 1695 2001 .64 .64 .61 .63 .71 .67 .62 .61 .64 .71 .75 .73 .74 39 TML314A 1686 2001 .75 .71 .35 .40 .77 .78 .66 .50 .56 .67 .71 .69 .69 40 TML204B 1679 1889 .53 .67 .59 .66 .68 .65 .74 .74 41 TML003A 1675 1927 .55 .69 .75 .75 .69 .59 .63 .53 .38 .36 42 TML203A 1670 2001 .25B .40 .74 .68 .67 .62 .48 .56 .53 .57 .60 .65 .66 .61 43 TML203B 1670 2001 .63 .60 .64 .77 .80 .79 .71 .67 .72 .75 .58 .76 .80 .80 44 TML009A 1663 2001 .49 .68 .59 .54 .59 .82 .80 .68 .39 .46 .81 .82 .70 .70 45 TML213A 1660 1919 .64 .63 .52 .61 .67 .68 .74 .82 .76 .73 46 TML213B 1660 1879 .78 .78 .77 .73 .73 .66 .63 .78 .79 47 TML314B 1659 2001 .55 .66 .49 .39 .57 .75 .74 .59 .49 .55 .63 .81 .78 .77 48 TML001B 1630 2001 .26B .63 .58 .49 .66 .79 .64 .68 .56 .42 .58 .70 .67 .67 .66 49 TML003B 1610 1939 .60 .62 .61 .80 .79 .75 .76 .82 .72 .65 .62 .56 .59 50 TML302B 1567 1880 .88 .81 .67 .61 .55 .58 .62 .59 .57 .53 .60 .72 .73 51 TML302A 1564 1939 .89 .87 .75 .72 .67 .73 .73 .60 .67 .55 .52 .62 .62 .67 .63 Av segment correlation .89 .84 .67 .55 .58 .64 .66 .61 .64 .65 .63 .63 .61 .64 .65 .70 .67 .69 PART 7: DESCRIPTIVE STATISTICS: Two Medicine Lake 16:49 Tue 07 Jun 2011 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 () --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- 1 TML306B 1913 2001 89 4 0 .615 1.61 3.80 .722 .792 .211 2.58 .395 -.058 2 2 TML301A 1912 1999 88 3 0 .600 .65 1.38 .266 .821 .199 2.51 .393 -.101 1 3 TML006A 1896 2001 106 5 0 .683 1.76 4.27 .690 .775 .204 2.35 .309 -.063 1 4 TML104B 1883 2001 119 5 0 .727 1.15 2.37 .398 .688 .215 2.50 .411 -.023 1 5 TML008A 1880 2001 122 5 0 .699 1.10 2.71 .565 .781 .257 2.46 .298 -.015 1 6 TLM301B 1879 1999 121 4 0 .628 .81 1.52 .349 .875 .203 2.46 .369 -.037 1 7 TML007A 1876 2001 126 5 0 .611 1.69 5.03 .832 .783 .225 2.76 .488 .003 1 8 TML108A 1860 2001 142 6 0 .624 1.79 5.05 .836 .824 .196 2.72 .455 .022 1 9 TML111A 1849 2001 153 7 0 .631 1.02 2.11 .428 .745 .227 2.62 .391 -.023 1 10 TML108B 1847 2001 155 7 0 .668 1.81 4.76 .788 .816 .214 2.78 .444 -.046 1 11 TML313A 1841 2001 161 7 0 .616 1.09 3.20 .531 .542 .314 2.90 .441 .007 1 12 TML102B 1840 2001 162 7 0 .622 .63 1.65 .259 .739 .231 2.62 .418 .026 1 13 TML112B 1840 2001 162 7 0 .549 1.30 6.08 1.164 .907 .284 2.76 .554 -.040 1 14 TML201A 1830 2001 172 7 1 .474 2.18 3.52 .420 .413 .160 2.48 .367 -.010 1 15 TML105B 1830 2001 172 7 0 .744 1.85 3.98 .695 .609 .265 2.56 .438 -.052 1 16 tml112a 1820 2001 182 8 0 .680 .91 3.46 .421 .748 .244 2.87 .447 .005 2 17 TML104A 1820 2001 182 8 0 .665 1.16 2.41 .377 .519 .246 2.51 .404 -.015 1 18 TML013A 1817 2001 185 8 0 .679 1.24 4.20 .655 .801 .264 2.67 .348 .013 1 19 TML206A 1810 2001 192 8 0 .641 .45 2.13 .261 .813 .212 2.89 .474 -.047 1 20 TML012A 1806 2001 196 8 0 .625 1.79 5.32 1.068 .850 .219 2.72 .364 .031 1 21 TML105A 1806 2001 196 8 0 .686 1.34 3.29 .700 .769 .285 2.44 .291 .031 1 22 TML010A 1805 2001 197 8 0 .674 .36 1.12 .190 .772 .295 2.52 .334 -.028 1 23 TML109A 1790 2001 212 9 0 .582 .39 .87 .172 .737 .261 2.39 .322 -.013 1 24 TML214A 1790 2001 212 9 0 .635 .62 1.65 .263 .718 .241 2.69 .390 -.040 1 25 TML002A 1789 2001 213 9 0 .649 1.21 4.52 .806 .907 .243 2.56 .371 -.021 1 26 TML215B 1784 2001 218 9 0 .545 .79 2.19 .380 .701 .260 2.77 .397 .014 4 27 TML215A 1782 2001 220 9 0 .652 .69 2.53 .370 .688 .299 2.69 .362 -.046 1 28 TML010B 1780 2001 222 9 0 .717 .43 1.76 .284 .810 .292 2.69 .394 -.018 1 29 TML214B 1773 1939 167 7 0 .588 .86 2.63 .505 .820 .258 2.58 .300 -.041 1 30 TML002B 1768 2001 234 10 0 .677 1.35 4.85 .949 .873 .277 2.49 .348 .011 1 31 TML313B 1750 2001 252 10 0 .618 .85 2.30 .409 .619 .307 2.70 .377 -.058 1 32 TML110B 1743 1908 166 7 0 .610 .79 1.90 .364 .817 .224 2.47 .264 -.048 1 33 TML202B 1732 2001 270 11 0 .550 1.00 2.09 .397 .827 .189 2.58 .292 .000 1 34 TML312B 1730 1999 270 10 1 .585 .66 2.62 .356 .715 .266 2.70 .351 -.020 1 35 TML001A 1713 2001 289 12 0 .666 .75 2.24 .350 .756 .276 2.66 .404 .002 2 36 TML009B 1710 2001 292 12 0 .614 .88 2.22 .434 .856 .198 2.64 .409 -.032 1 37 TML102A 1710 2001 292 12 0 .728 .47 1.11 .175 .641 .243 2.48 .265 -.017 2 38 TML204A 1695 2001 307 13 0 .666 .55 2.00 .372 .855 .265 2.71 .385 -.043 1 39 TML314A 1686 2001 316 13 0 .624 .54 2.17 .308 .805 .240 2.75 .347 -.003 2 40 TML204B 1679 1889 211 8 0 .645 .63 2.03 .333 .838 .234 2.69 .410 -.026 1 41 TML003A 1675 1927 253 10 0 .593 .62 1.33 .217 .523 .264 2.62 .398 .011 1 42 TML203A 1670 2001 332 14 1 .557 .84 61.23 3.344 .034 .236 3.03 .357 -.017 1 43 TML203B 1670 2001 332 14 0 .710 1.08 3.02 .540 .777 .231 2.54 .326 .003 1 44 TML009A 1663 2001 339 14 0 .631 1.03 3.05 .493 .811 .213 2.58 .354 -.007 2 45 TML213A 1660 1919 260 10 0 .663 .59 1.98 .344 .817 .272 2.76 .385 -.015 2 46 TML213B 1660 1879 220 9 0 .728 .45 1.23 .228 .765 .246 2.86 .397 -.053 1 47 TML314B 1659 2001 343 14 0 .615 .56 1.76 .357 .831 .275 2.67 .345 -.008 2 48 TML001B 1630 2001 372 15 1 .547 .47 1.08 .168 .607 .280 2.64 .367 -.011 1 PART 7: DESCRIPTIVE STATISTICS: Two Medicine Lake 16:49 Tue 07 Jun 2011 Page 12 ----------------------------------------------------------------------------------------------------------------------------------- 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 TML003B 1610 1939 330 13 0 .665 .82 1.92 .338 .694 .241 2.49 .325 -.034 1 50 TML302B 1567 1880 314 13 0 .644 .57 2.35 .346 .846 .247 2.47 .334 .053 1 51 TML302A 1564 1939 376 15 0 .674 .62 1.87 .364 .842 .245 2.83 .426 .029 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 11214 462 4 .637 .88 61.23 .522 .737 .248 3.03 .372 -.014