Pintlers 2, Montana  - mt120 
Additional Information 
Jeremy Littell           

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   : MT120.CRN
      Measurement file name  : MT120.RWL
      Date checked           : 07JUN11
      Checked by             : B. Bauer
      Beginning year         : 1248
      Ending year            : 2006
      Principal investigators: Jeremy Littell                             
      Site name              : Pintlers 2
      Site location          : Montana      
      Species information    : LALY SUBALPINE LARCH
      Latitude               :   4601
      Longitude              : -11323
      Elevation              : 2750M

      Series intercorrelation: 0.770
      Avg mean sensitivity   : 0.343
      Avg standard deviation : 0.137
      Avg autocorrelation    : 0.597
      Number dated series    : 30
      Segment length tested  : 50

      Number problem segments: 1
      Pct problem segments   : 0.19



 PART 5:  CORRELATION OF SERIES BY SEGMENTS: Pintlers 2                                            16:47  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   1300 1325 1350 1375 1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775

                         1349 1374 1399 1424 1449 1474 1499 1524 1549 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824

 --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----

   1 03A      1780 2006                                                                                                  .76

   2 04B      1447 2006                            .47  .56  .79  .81  .73  .71  .73  .80  .75  .68  .54  .67  .89  .88  .83

   3 05B      1482 2006                                      .63  .71  .75  .75  .87  .88  .85  .76  .77  .78  .79  .84  .83

   4 06B      1480 2006                                      .68  .71  .67  .74  .81  .80  .85  .79  .73  .85  .89  .87  .87

   5 07B      1510 2006                                           .67  .69  .77  .81  .85  .86  .82  .83  .86  .91  .93  .92

   6 08A      1586 2006                                                          .64  .82  .87  .72  .74  .82  .79  .81  .86

   7 09A      1511 2006                                           .41  .38  .61  .77  .79  .84  .84  .81  .83  .83  .81  .77

   8 10B      1557 2006                                                     .78  .78  .82  .84  .74  .66  .73  .80  .82  .78

   9 11A      1743 2006                                                                                        .88  .89  .86

  10 01A      1529 2006                                                .75  .76  .81  .83  .84  .84  .67  .71  .87  .89  .90

  11 13B      1628 2006                                                                    .84  .84  .85  .83  .83  .87  .91

  12 14B      1618 2006                                                               .77  .80  .81  .76  .79  .83  .88  .85

  13 15A      1394 2006                  .81  .81  .64  .58  .73  .80  .76  .74  .80  .81  .81  .79  .65  .71  .47  .40B .51

  14 17B      1305 2006   .67  .76  .73  .83  .91  .81  .76  .79  .82  .73  .65  .81  .78  .72  .69  .52  .50  .64  .78  .81

  15 18A      1655 2006                                                                         .68  .54  .68  .87  .89  .86

  16 16xA     1248 1633   .65  .77  .79  .63  .70  .74  .67  .78  .79  .72  .67  .78  .79

  17 003B     1778 2006                                                                                                  .82

  18 07A      1444 2006                            .55  .57  .54  .60  .64  .79  .85  .89  .91  .88  .84  .85  .89  .95  .95

  19 05A      1537 2006                                                .74  .77  .90  .86  .83  .83  .86  .85  .87  .84  .74

  20 04A      1326 2006        .62  .66  .73  .70  .66  .67  .77  .77  .73  .74  .84  .85  .83  .48  .45  .81  .76  .77  .88

  21 15B      1655 2006                                                                         .74  .63  .71  .85  .85  .84

  22 10A      1566 2006                                                     .73  .78  .81  .82  .77  .76  .80  .79  .76  .78

  23 08B      1557 2006                                                     .66  .66  .85  .84  .71  .65  .72  .75  .76  .83

  24 09B      1527 1960                                                .58  .80  .86  .87  .87  .87  .86  .90  .87  .79  .69

  25 06A      1516 2006                                           .36  .38  .52  .76  .60  .61  .82  .80  .85  .87  .83  .89

  26 17A      1316 1910   .68  .70  .68  .75  .74  .59  .67  .75  .81  .72  .67  .79  .81  .75  .76  .71  .65  .69  .76  .80

  27 02A      1567 2006                                                     .70  .74  .82  .72  .65  .69  .73  .75  .83  .83

  28 14A      1663 2006                                                                         .66  .65  .80  .85  .93  .86

  29 13A      1663 2006                                                                         .67  .82  .80  .81  .85  .86

 Av segment correlation   .67  .71  .72  .75  .77  .64  .64  .72  .69  .66  .71  .79  .81  .81  .75  .71  .77  .81  .83  .82

 PART 5:  CORRELATION OF SERIES BY SEGMENTS: Pintlers 2                                            16:47  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   1800 1825 1850 1875 1900 1925 1950 1975

                         1849 1874 1899 1924 1949 1974 1999 2024

 --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----

   1 03A      1780 2006   .82  .88  .73  .55  .70  .82  .68  .71

   2 04B      1447 2006   .80  .81  .76  .79  .73  .73  .80  .80

   3 05B      1482 2006   .83  .83  .71  .65  .84  .72  .62  .63

   4 06B      1480 2006   .84  .80  .63  .42  .67  .79  .84  .85

   5 07B      1510 2006   .87  .86  .83  .77  .82  .86  .88  .89

   6 08A      1586 2006   .81  .78  .72  .70  .82  .84  .84  .87

   7 09A      1511 2006   .79  .75  .65  .78  .87  .81  .76  .75

   8 10B      1557 2006   .82  .81  .64  .61  .71  .83  .84  .85

   9 11A      1743 2006   .87  .90  .82  .83  .86  .83  .77  .79

  10 01A      1529 2006   .90  .86  .73  .77  .78  .73  .75  .75

  11 13B      1628 2006   .84  .75  .72  .73  .75  .75  .72  .73

  12 14B      1618 2006   .82  .83  .80  .78  .81  .84  .81  .83

  13 15A      1394 2006   .60  .83  .75  .70  .74  .77  .76  .74

  14 17B      1305 2006   .81  .86  .79  .61  .61  .78  .63  .61

  15 18A      1655 2006   .85  .85  .82  .81  .83  .83  .84  .83

  17 003B     1778 2006   .82  .88  .88  .81  .82  .87  .80  .81

  18 07A      1444 2006   .95  .92  .87  .80  .79  .86  .81  .80

  19 05A      1537 2006   .71  .66  .68  .65  .72  .80  .75  .80

  20 04A      1326 2006   .86  .84  .74  .80  .79  .78  .86  .87

  21 15B      1655 2006   .84  .85  .83  .81  .79  .65  .68  .67

  22 10A      1566 2006   .82  .83  .62  .71  .81  .81  .83  .85

  23 08B      1557 2006   .84  .89  .73  .58  .74  .89  .92  .90

  24 09B      1527 1960   .73  .87  .76  .73  .76  .77

  25 06A      1516 2006   .86  .84  .84  .81  .74  .64  .67  .70

  26 17A      1316 1910   .66  .69  .79  .67

  27 02A      1567 2006   .78  .72  .62  .76  .84  .81  .81  .75

  28 14A      1663 2006   .82  .84  .79  .83  .84  .84  .82  .83

  29 13A      1663 2006   .87  .91  .82  .78  .76  .77  .80  .82

  30 01B      1845 2006        .77  .71  .66  .79  .89  .79  .79

 Av segment correlation   .82  .83  .75  .72  .78  .80  .78  .78

 PART 7:  DESCRIPTIVE STATISTICS: Pintlers 2                                                       16:47  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 03A      1780 2006    227      9      0    .699    .31    .58   .101   .340   .322   2.39   .306  -.005   1

   2 04B      1447 2006    560     23      0    .728    .26    .55   .091   .345   .365   2.43   .289  -.026   2

   3 05B      1482 2006    525     21      0    .765    .30    .92   .160   .762   .335   2.57   .342  -.005   1

   4 06B      1480 2006    527     21      0    .784    .29    .71   .136   .625   .341   2.64   .338  -.020   1

   5 07B      1510 2006    497     20      0    .821    .27   1.32   .136   .624   .377   2.66   .411  -.021   1

   6 08A      1586 2006    421     17      0    .784    .37   1.14   .175   .694   .311   2.49   .313  -.032   1

   7 09A      1511 2006    496     20      0    .762    .35   1.28   .192   .727   .325   2.64   .341  -.017   1

   8 10B      1557 2006    450     18      0    .763    .32    .81   .138   .503   .361   2.71   .406  -.029   1

   9 11A      1743 2006    264     11      0    .841    .38   1.02   .166   .542   .364   2.59   .385   .011   1

  10 01A      1529 2006    478     19      0    .801    .22    .61   .095   .574   .332   2.69   .361  -.017   1

  11 13B      1628 2006    379     15      0    .810    .39   1.10   .201   .588   .408   2.48   .362  -.034   1

  12 14B      1618 2006    389     16      0    .813    .52   1.15   .185   .516   .305   2.66   .412   .015   1

  13 15A      1394 2006    613     25      1    .713    .22    .69   .116   .645   .369   2.63   .335  -.025   1

  14 17B      1305 2006    702     28      0    .723    .20    .93   .118   .772   .296   2.82   .385  -.020   1

  15 18A      1655 2006    352     14      0    .796    .25    .50   .097   .558   .315   2.37   .248  -.011   1

  16 16xA     1248 1633    386     13      0    .762    .25    .74   .113   .595   .329   2.76   .298  -.023   1

  17 003B     1778 2006    229      9      0    .826    .27    .61   .120   .578   .368   2.50   .356  -.012   1

  18 07A      1444 2006    563     23      0    .801    .26    .66   .111   .575   .345   2.56   .387  -.011   1

  19 05A      1537 2006    470     19      0    .769    .26    .79   .158   .789   .385   2.52   .330  -.005   1

  20 04A      1326 2006    681     27      0    .745    .28    .79   .147   .639   .387   2.47   .259  -.027   2

  21 15B      1655 2006    352     14      0    .779    .20    .44   .091   .513   .419   2.54   .408  -.028   1

  22 10A      1566 2006    441     18      0    .765    .35    .84   .142   .426   .370   2.56   .308  -.023   1

  23 08B      1557 2006    450     18      0    .773    .26    .63   .135   .710   .324   2.61   .428   .016   1

  24 09B      1527 1960    434     17      0    .797    .28    .60   .118   .434   .400   2.72   .438  -.005   1

  25 06A      1516 2006    491     20      0    .762    .30    .97   .142   .654   .312   2.61   .302  -.007   1

  26 17A      1316 1910    595     24      0    .707    .21   1.58   .136   .688   .293   2.73   .400  -.010   1

  27 02A      1567 2006    440     18      0    .737    .44    .97   .153   .644   .229   2.50   .330  -.007   1

  28 14A      1663 2006    344     14      0    .809    .60   1.27   .198   .492   .273   2.50   .264  -.003   1

  29 13A      1663 2006    344     14      0    .808    .34    .90   .151   .437   .411   2.66   .508  -.015   1

  30 01B      1845 2006    162      7      0    .800    .23    .45   .078   .338   .348   2.44   .405  -.006   3

 --- -------- ---------  -----  -----  -----   ------ -----  -----  -----  -----  -----  -----  -----  -----  --

 Total or mean:          13262    532      1    .770    .30   1.58   .137   .597   .343   2.82   .353  -.015

