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

