Boulder Lake, Wyoming - wy043 Additional Information Steve Gray Greg Pederson Tom Watson Anthony Barnett 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 : WY043.CRN Measurement file name : WY043.RWL Date checked : 07JUN11 Checked by : B. Bauer Beginning year : 1576 Ending year : 2006 Principal investigators: Steve Gray Greg Pederson Tom Watson Anthony Barnett Site name : Boulder Lake Site location : Wyoming Species information : PSME DOUGLAS-FIR Latitude : 4251 Longitude : -10938 Elevation : 2431M Series intercorrelation: 0.783 Avg mean sensitivity : 0.345 Avg standard deviation : 0.631 Avg autocorrelation : 0.686 Number dated series : 41 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 0.24 PART 5: CORRELATION OF SERIES BY SEGMENTS: Boulder Lake 16:39 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 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 BLE 229 1757 2006 .74 .71 .55 .79 .76 .69 .79 .86 .85 .86 2 BLE 081 1772 2006 .87 .88 .87 .82 .78 .83 .88 .81 .78 .79 3 BLE 091 1705 2006 .80 .83 .82 .70 .62 .77 .65 .72 .86 .88 .82 .83 4 BLE 092 1728 2006 .75 .79 .83 .81 .86 .79 .80 .86 .84 .83 .85 5 BLE 021 1909 2006 .63 .75 .79 .73 6 BLE 022 1897 2006 .61 .58 .69 .73 .71 7 BLE 111 1811 2006 .81 .80 .75 .78 .89 .87 .77 .78 8 BLE 113 1834 2005 .79 .75 .82 .88 .87 .82 .81 9 BLE 141 1662 2006 .77 .86 .88 .82 .78 .81 .83 .79 .76 .82 .81 .73 .71 .77 10 BLE 171 1707 2005 .71 .78 .84 .86 .83 .85 .84 .86 .91 .90 .70 .63 11 BLE 181 1714 2006 .86 .79 .74 .78 .87 .90 .85 .84 .90 .90 .87 .89 12 BLE 183 1731 2006 .82 .84 .81 .87 .92 .87 .87 .92 .90 .83 .84 13 BLE 191 1787 2006 .86 .81 .86 .84 .88 .95 .91 .89 .88 14 BLE 192 1771 2005 .84 .85 .87 .88 .80 .85 .93 .89 .52 .45 15 BLE 202 1816 2005 .45 .38 .49 .74 .84 .89 .59 .48 16 BLE 211 1894 2006 .76 .73 .69 .68 .66 17 BLE 221 1801 2006 .65 .77 .68 .61 .77 .81 .80 .81 18 BLE 990 1679 2006 .90 .90 .88 .86 .84 .78 .83 .82 .82 .89 .69 .67 .74 19 BLE 162 1715 2005 .95 .93 .84 .80 .86 .72 .59 .69 .90 .70 .55 .52 20 BLE 143 1659 2006 .79 .91 .94 .87 .82 .89 .86 .77 .72 .79 .89 .75 .73 .79 21 BLE 161 1688 2006 .89 .87 .86 .90 .87 .78 .78 .60 .63 .89 .79 .68 .67 22 BLE 072 1616 2006 .68 .73 .83 .89 .88 .85 .83 .84 .82 .80 .72 .74 .82 .75 .80 .82 23 BLE 071 1576 2006 .68 .74 .85 .90 .90 .85 .79 .82 .81 .83 .81 .77 .81 .88 .85 .85 24 BLE 059 1871 2006 .75 .76 .80 .79 .78 .82 25 BLE 102 1772 2006 .59 .63 .69 .75 .68 .65 .70 .74 .80 .78 26 BLE 012 1719 2006 .87 .86 .87 .88 .88 .90 .84 .86 .87 .86 .71 .69 27 BLE 182 1717 2006 .89 .87 .88 .87 .86 .90 .85 .85 .92 .92 .87 .88 28 BLE 153 1654 2006 .67 .79 .77 .81 .75 .64 .61 .83 .68 .64 .80 .77 .61 .65 29 BLE 061 1688 2006 .90 .90 .88 .76 .78 .89 .87 .76 .74 .76 .70 .77 .81 30 BLE 151 1690 2006 .81 .80 .84 .80 .73 .74 .76 .59 .47 .61 .77 .81 .84 31 BLE 112 1808 2006 .72 .82 .74 .69 .76 .77 .72 .72 32 BLE 172 1716 2006 .78 .74 .82 .84 .87 .87 .87 .88 .93 .91 .90 .91 33 BLE 082 1768 2006 .83 .86 .88 .90 .85 .84 .85 .80 .76 .78 34 BLE 152 1672 2006 .76 .78 .80 .83 .81 .71 .65 .81 .78 .76 .77 .75 .81 .82 35 BLE 129 1887 2006 .83 .86 .89 .85 .86 36 BLE 041 1815 2006 .87 .89 .81 .82 .84 .77 .83 .84 37 BLE 223 1786 2006 .77 .68 .78 .80 .77 .80 .79 .75 .76 38 BLE 062 1703 2006 .88 .91 .82 .79 .82 .80 .80 .68 .53 .57 .67 .69 39 BLE 101 1768 2006 .63 .72 .70 .75 .70 .70 .77 .72 .71 .72 40 BLE 891 1791 2006 .44 .83 .89 .80 .77 .83 .84 .80 .78 41 BLE 201 1821 2006 .55 .34 .29B .54 .72 .81 .83 .85 Av segment correlation .68 .73 .78 .86 .85 .84 .80 .79 .77 .80 .74 .75 .82 .80 .76 .77 PART 7: DESCRIPTIVE STATISTICS: Boulder Lake 16:39 Tue 07 Jun 2011 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 BLE 229 1757 2006 250 10 0 .754 1.56 5.76 .780 .729 .239 2.66 .366 .022 1 2 BLE 081 1772 2006 235 10 0 .832 1.00 3.89 .612 .657 .327 2.99 .474 -.006 1 3 BLE 091 1705 2006 302 12 0 .769 .99 2.61 .431 .698 .256 2.56 .277 -.036 2 4 BLE 092 1728 2006 279 11 0 .813 1.15 3.44 .538 .691 .269 2.58 .379 -.055 3 5 BLE 021 1909 2006 98 4 0 .684 2.63 4.61 1.030 .736 .248 2.71 .540 .081 1 6 BLE 022 1897 2006 110 5 0 .655 2.58 5.49 1.144 .724 .274 2.86 .565 .047 1 7 BLE 111 1811 2006 196 8 0 .804 1.33 4.62 .759 .580 .382 2.88 .542 -.041 2 8 BLE 113 1834 2005 172 7 0 .808 1.03 2.23 .453 .664 .292 2.74 .490 -.068 1 9 BLE 141 1662 2006 345 14 0 .796 .99 3.72 .600 .716 .311 2.71 .369 -.031 2 10 BLE 171 1707 2005 299 12 0 .773 1.03 3.01 .625 .735 .335 2.65 .355 -.076 2 11 BLE 181 1714 2006 293 12 0 .843 1.36 4.78 .863 .716 .412 2.63 .376 -.070 2 12 BLE 183 1731 2006 276 11 0 .859 1.14 2.90 .601 .581 .426 2.72 .504 -.049 3 13 BLE 191 1787 2006 220 9 0 .879 1.41 5.80 .919 .695 .399 2.79 .427 -.020 1 14 BLE 192 1771 2005 235 10 0 .772 1.19 4.02 .742 .692 .392 2.54 .333 -.033 1 15 BLE 202 1816 2005 190 8 0 .564 1.71 6.31 1.298 .827 .342 2.66 .418 -.052 1 16 BLE 211 1894 2006 113 5 0 .713 2.96 7.82 1.448 .662 .312 2.64 .431 -.015 2 17 BLE 221 1801 2006 206 8 0 .736 1.26 4.13 .714 .798 .253 2.85 .482 .007 2 18 BLE 990 1679 2006 328 13 0 .826 1.03 2.79 .461 .601 .302 2.66 .382 -.035 1 19 BLE 162 1715 2005 291 12 0 .772 .95 3.19 .518 .595 .342 2.67 .441 -.019 1 20 BLE 143 1659 2006 348 14 0 .825 1.12 4.29 .670 .696 .309 2.64 .383 -.015 1 21 BLE 161 1688 2006 319 13 0 .795 .93 2.58 .453 .496 .362 2.75 .420 .000 1 22 BLE 072 1616 2006 391 16 0 .812 .53 3.93 .455 .706 .462 2.87 .450 -.031 1 23 BLE 071 1576 2006 431 16 0 .829 .50 2.75 .446 .776 .414 2.61 .364 -.036 1 24 BLE 059 1871 2006 136 6 0 .770 1.23 3.27 .678 .673 .347 2.48 .374 -.035 1 25 BLE 102 1772 2006 235 10 0 .697 .95 3.71 .773 .755 .458 2.64 .382 -.048 1 26 BLE 012 1719 2006 288 12 0 .831 1.30 3.88 .615 .658 .291 2.75 .382 -.021 1 27 BLE 182 1717 2006 290 12 0 .875 1.05 2.51 .549 .607 .414 2.78 .491 -.053 2 28 BLE 153 1654 2006 353 14 0 .711 .81 2.36 .470 .702 .314 2.65 .322 -.017 2 29 BLE 061 1688 2006 319 13 0 .813 .84 3.46 .586 .723 .347 2.78 .374 -.041 1 30 BLE 151 1690 2006 317 13 0 .718 .65 3.90 .476 .709 .335 2.90 .395 -.032 2 31 BLE 112 1808 2006 199 8 0 .731 .94 4.26 .671 .756 .373 2.89 .533 -.051 1 32 BLE 172 1716 2006 291 12 0 .848 .89 2.52 .484 .725 .336 2.68 .358 -.058 2 33 BLE 082 1768 2006 239 10 0 .834 .79 2.89 .538 .706 .308 2.76 .450 .030 1 34 BLE 152 1672 2006 335 14 0 .769 .55 1.70 .246 .557 .333 2.67 .340 -.039 2 35 BLE 129 1887 2006 120 5 0 .856 1.92 6.25 1.434 .843 .349 2.73 .522 -.022 1 36 BLE 041 1815 2006 192 8 0 .832 .74 2.48 .384 .535 .378 2.57 .424 -.032 1 37 BLE 223 1786 2006 221 9 0 .770 1.35 5.00 .778 .766 .275 2.74 .471 .008 1 38 BLE 062 1703 2006 304 12 0 .759 .69 3.32 .493 .718 .355 2.80 .450 -.043 1 39 BLE 101 1768 2006 239 10 0 .718 1.05 3.82 .721 .708 .422 2.68 .394 -.040 1 40 BLE 891 1791 2006 216 9 0 .719 1.04 3.46 .549 .565 .350 2.91 .542 .001 1 41 BLE 201 1821 2006 186 8 1 .629 1.75 7.80 1.270 .800 .301 2.81 .435 -.030 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 10407 425 1 .783 1.07 7.82 .631 .686 .345 2.99 .413 -.029