Louis Lake Road, Wyoming - wy041 Additional Information Steve Gray Greg Pederson Kali Abel 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 : WY041.CRN Measurement file name : WY041.RWL Date checked : 07JUN11 Checked by : B. Bauer Beginning year : 1017 Ending year : 2007 Principal investigators: Steve Gray Greg Pederson Kali Abel Site name : Louis Lake Road Site location : Wyoming Species information : PIFL LIMBER PINE Latitude : 4233 Longitude : -10849 Elevation : 2731M Series intercorrelation: 0.748 Avg mean sensitivity : 0.276 Avg standard deviation : 0.330 Avg autocorrelation : 0.699 Number dated series : 22 Segment length tested : 50 Number problem segments: 0 Pct problem segments : 0.00 PART 5: CORRELATION OF SERIES BY SEGMENTS: Louis Lake Road 16:59 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 1150 1175 1200 1225 1250 1275 1300 1325 1350 1375 1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1199 1224 1249 1274 1299 1324 1349 1374 1399 1424 1449 1474 1499 1524 1549 1574 1599 1624 1649 1674 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 LLR 01B 1400 2007 .79 .84 .89 .89 .79 .77 .80 .73 .74 .73 4 LLR40x 1394 1641 .75 .74 .73 .81 .84 .77 .58 .45 .63 .63 5 LLR38x 1165 1655 .66 .74 .77 .63 .59 .75 .78 .65 .63 .84 .83 .86 .86 .85 .84 .80 .72 .69 .83 .86 6 LLR39x 1017 1430 .66 .74 .77 .63 .59 .75 .78 .57 .46 .65 .72 7 LLR36x 1590 1937 .58 .65 .75 8 LLR37x 1350 1665 .56 .74 .78 .89 .90 .83 .75 .86 .81 .67 .80 .79 9 LLR 19B 1381 2007 .74 .78 .89 .90 .85 .81 .87 .83 .80 .83 .76 10 LLR 19A 1376 2007 .63 .87 .88 .91 .88 .84 .86 .86 .81 .81 .77 11 LLR 20A 1518 2007 .84 .79 .64 .67 .77 .74 12 LLR 20B 1484 2007 .74 .80 .85 .69 .61 .76 .75 13 LLR 20C 1583 2007 .59 .67 .73 14 LLR 28A 1586 2007 .70 .78 .78 16 LLR 16B 1619 2007 .83 .82 19 LLR 34A 1412 1980 .68 .80 .90 .88 .89 .85 .71 .71 .79 .73 20 LLR 34B 1450 2006 .88 .92 .88 .84 .80 .72 .76 .81 21 LLR 33A 1441 2007 .51 .40 .48 .75 .76 .67 .63 .79 .62 22 LLR 99 1548 2007 .52 .53 .53 .69 .79 Av segment correlation .66 .74 .77 .63 .59 .75 .78 .61 .55 .72 .77 .80 .83 .82 .81 .78 .71 .67 .76 .76 PART 5: CORRELATION OF SERIES BY SEGMENTS: Louis Lake Road 16:59 Tue 07 Jun 2011 Page 6 ----------------------------------------------------------------------------------------------------------------------------------- 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 LLR 01B 1400 2007 .70 .77 .79 .73 .79 .86 .85 .86 .85 .83 .67 .68 .77 .73 2 LLR 15A 1740 2006 .72 .71 .79 .81 .74 .49 .45 .63 .63 .54 .59 3 LLR 31 1681 2007 .78 .84 .80 .79 .89 .88 .82 .87 .82 .70 .73 .72 .71 7 LLR36x 1590 1937 .70 .77 .84 .80 .81 .78 .74 .73 .77 .63 .57 9 LLR 19B 1381 2007 .70 .82 .85 .83 .83 .87 .84 .80 .84 .86 .78 .70 .74 .68 10 LLR 19A 1376 2007 .67 .71 .81 .85 .84 .90 .89 .86 .91 .89 .81 .82 .83 .78 11 LLR 20A 1518 2007 .58 .54 .68 .54 .45 .72 .80 .60 .64 .79 .78 .75 .71 .69 12 LLR 20B 1484 2007 .65 .43 .60 .60 .66 .91 .83 .67 .73 .74 .64 .62 .62 .68 13 LLR 20C 1583 2007 .65 .59 .74 .77 .73 .83 .83 .79 .80 .81 .81 .77 .73 .57 14 LLR 28A 1586 2007 .70 .75 .80 .69 .62 .69 .78 .84 .84 .79 .65 .80 .82 .72 15 LLR 16A 1823 2007 .60 .53 .69 .77 .47 .48 .53 .51 16 LLR 16B 1619 2007 .73 .78 .81 .76 .82 .88 .85 .78 .84 .83 .67 .74 .71 .66 17 LLR 31 1656 2007 .62 .80 .84 .79 .79 .89 .88 .82 .87 .82 .70 .73 .72 .71 18 LLR 32A 1673 2007 .70 .72 .68 .67 .80 .85 .80 .65 .80 .81 .67 .71 .79 .66 19 LLR 34A 1412 1980 .62 .77 .85 .83 .81 .86 .85 .79 .73 .77 .75 .66 .64 20 LLR 34B 1450 2006 .70 .78 .81 .79 .80 .84 .82 .78 .76 .74 .66 .68 .67 .64 21 LLR 33A 1441 2007 .54 .78 .77 .70 .81 .85 .80 .69 .74 .79 .67 .75 .75 .69 22 LLR 99 1548 2007 .75 .81 .78 .72 .81 .86 .81 .80 .90 .89 .71 .76 .82 .74 Av segment correlation .67 .73 .78 .74 .76 .84 .81 .75 .78 .78 .69 .71 .71 .67 PART 7: DESCRIPTIVE STATISTICS: Louis Lake Road 16:59 Tue 07 Jun 2011 Page 13 ----------------------------------------------------------------------------------------------------------------------------------- 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 LLR 01B 1400 2007 608 24 0 .790 .54 1.38 .213 .581 .304 2.44 .334 -.038 1 2 LLR 15A 1740 2006 267 11 0 .663 .75 2.13 .385 .780 .323 2.58 .306 -.022 1 3 LLR 31 1681 2007 327 13 0 .799 .67 1.72 .258 .749 .219 2.57 .300 -.012 1 4 LLR40x 1394 1641 248 10 0 .701 .66 1.41 .239 .733 .217 2.81 .362 -.011 1 5 LLR38x 1165 1655 491 20 0 .746 .50 1.10 .183 .428 .325 2.49 .339 -.022 1 6 LLR39x 1017 1430 414 11 0 .655 .48 1.67 .245 .618 .343 2.62 .363 -.010 1 7 LLR36x 1590 1937 348 14 0 .713 .49 1.02 .147 .417 .264 2.55 .370 -.041 1 8 LLR37x 1350 1665 316 12 0 .769 .30 .74 .132 .663 .318 2.37 .258 -.051 1 9 LLR 19B 1381 2007 627 25 0 .808 .34 1.47 .233 .810 .330 2.49 .317 -.018 2 10 LLR 19A 1376 2007 632 25 0 .827 .47 1.97 .306 .750 .342 2.61 .383 -.043 2 11 LLR 20A 1518 2007 490 20 0 .685 .67 2.37 .337 .837 .200 2.70 .454 -.018 2 12 LLR 20B 1484 2007 524 21 0 .697 .70 4.34 .376 .789 .202 2.62 .361 -.015 2 13 LLR 20C 1583 2007 425 17 0 .712 .49 1.34 .223 .847 .197 2.57 .392 -.025 1 14 LLR 28A 1586 2007 422 17 0 .737 .52 1.62 .198 .667 .241 2.57 .308 .003 1 15 LLR 16A 1823 2007 185 8 0 .596 .43 1.06 .177 .680 .292 2.63 .516 -.091 1 16 LLR 16B 1619 2007 389 16 0 .777 .60 1.48 .245 .638 .273 2.55 .325 -.038 1 17 LLR 31 1656 2007 352 14 0 .790 .72 2.07 .321 .813 .217 2.57 .299 -.013 1 18 LLR 32A 1673 2007 335 14 0 .739 .69 2.06 .431 .869 .269 2.67 .391 -.023 1 19 LLR 34A 1412 1980 569 23 0 .796 3.52 9.22 1.515 .596 .321 2.48 .275 -.034 5 20 LLR 34B 1450 2006 557 22 0 .792 .35 1.02 .161 .650 .313 2.48 .304 -.041 1 21 LLR 33A 1441 2007 567 23 0 .694 .51 1.67 .271 .869 .215 2.56 .363 -.038 2 22 LLR 99 1548 2007 460 19 0 .746 .71 1.81 .260 .603 .274 2.53 .332 -.050 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 9553 379 0 .748 .72 9.22 .330 .699 .276 2.81 .345 -.029