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

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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   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

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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 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

