Navajo Canyon, Colorado  - co647 
Additional Information 
Dave Meko  Chris Baisan  Troy Knight         

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   : CO647.CRN
      Measurement file name  : CO647.RWL
      Date checked           : 07JUN11
      Checked by             : B. Bauer
      Beginning year         : 1230
      Ending year            : 2005
      Principal investigators: Dave Meko  Chris Baisan  Troy Knight                 
      Site name              : Navajo Canyon
      Site location          : Colorado     
      Species information    : PSME DOUGLAS-FIR
      Latitude               :   3712
      Longitude              : -10830
      Elevation              : 2134m

      Series intercorrelation: 0.878
      Avg mean sensitivity   : 0.592
      Avg standard deviation : 0.305
      Avg autocorrelation    : 0.568
      Number dated series    : 24
      Segment length tested  : 50

      Number problem segments: 0
      Pct problem segments   : 0.00



 PART 5:  CORRELATION OF SERIES BY SEGMENTS: Navajo Canyon                                         16:42  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   1225 1250 1275 1300 1325 1350 1375 1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700

                         1274 1299 1324 1349 1374 1399 1424 1449 1474 1499 1524 1549 1574 1599 1624 1649 1674 1699 1724 1749

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

   1 NAV02A   1370 1670                            .76  .82  .84  .85  .88  .91  .92  .91  .87  .88  .80  .78

   2 NAV02B   1407 1750                                      .83  .85  .89  .88  .82  .79  .85  .90  .87  .87  .90  .92  .93

   3 NAV03A   1590 2005                                                                         .90  .91  .94  .91  .87  .89

   4 NAV03B   1531 2005                                                               .61  .86  .90  .95  .95  .94  .92  .92

   5 NAV04A1  1520 1562                                                          .86

   6 NAV04A2  1570 2005                                                                    .82  .83  .85  .89  .91  .89  .87

   7 NAV04B   1663 2005                                                                                        .79  .81  .83

   8 NAV05A   1428 1750                                           .86  .95  .93  .90  .93  .93  .92  .93  .92  .88  .89  .91

   9 NAV05B   1411 1750                                      .81  .87  .95  .92  .90  .92  .94  .95  .96  .95  .55  .61  .90

  10 NAV06A   1564 2005                                                                    .88  .87  .87  .89  .87  .85  .90

  11 NAV06B   1545 2005                                                               .85  .88  .90  .87  .87  .87  .88  .92

  12 NAV07A   1393 1800                                 .81  .87  .90  .93  .95  .96  .96  .91  .89  .94  .94  .82  .86  .93

  13 NAV07B   1372 1820                            .90  .89  .88  .90  .94  .95  .94  .92  .89  .88  .93  .94  .91  .91  .94

  14 NAV08A   1454 2005                                                .95  .95  .93  .95  .93  .90  .91  .93  .96  .95  .94

  15 NAV08B   1442 2005                                           .91  .95  .94  .92  .92  .92  .90  .89  .92  .95  .95  .96

  17 NAV18B   1663 2005                                                                                        .88  .92  .95

  18 NAV22A   1341 2005                       .90  .92  .87  .85  .93  .95  .91  .91  .94  .93  .94  .96  .97  .95  .92  .92

  19 NAV22B   1314 2000                  .87  .88  .92  .90  .88  .91  .94  .88  .88  .92  .89  .90  .95  .95  .95  .93  .94

  20 NAV27A   1230 1470   .77  .78  .88  .91  .89  .85  .82  .83  .80

  21 NAV29A   1248 1460   .72  .73  .81  .92  .90  .87  .89  .88  .88

  22 NAV33A   1287 1860             .75  .87  .90  .87  .84  .83  .78  .81  .88  .88  .89  .90  .89  .93  .95  .93  .91  .93

  23 NAV35A   1365 1990                            .86  .87  .87  .89  .93  .94  .95  .94  .90  .92  .91  .90  .88  .89  .86

  24 NAV37A   1397 2000                                 .74  .73  .82  .93  .94  .92  .86  .80  .85  .89  .89  .89  .91  .94

 Av segment correlation   .75  .75  .81  .89  .90  .87  .85  .84  .87  .93  .92  .91  .89  .89  .90  .91  .91  .88  .88  .91

 PART 5:  CORRELATION OF SERIES BY SEGMENTS: Navajo Canyon                                         16:42  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   1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1975

                         1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 2024

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

   2 NAV02B   1407 1750   .92

   3 NAV03A   1590 2005   .93  .90  .91  .91  .91  .96  .93  .93  .93  .95  .94

   4 NAV03B   1531 2005   .92  .91  .92  .88  .84  .88  .91  .91  .91  .91  .91

   6 NAV04A2  1570 2005   .91  .94  .95  .95  .95  .95  .95  .95  .94  .96  .95

   7 NAV04B   1663 2005   .86  .91  .94  .93  .92  .93  .93  .93  .92  .91  .90

   8 NAV05A   1428 1750   .91

   9 NAV05B   1411 1750   .89

  10 NAV06A   1564 2005   .87  .83  .84  .86  .88  .91  .83  .82  .86  .86  .85

  11 NAV06B   1545 2005   .91  .90  .91  .89  .90  .92  .92  .93  .92  .92  .92

  12 NAV07A   1393 1800   .88  .74  .74

  13 NAV07B   1372 1820   .94  .93  .92

  14 NAV08A   1454 2005   .92  .90  .94  .97  .97  .96  .97  .96  .96  .96  .96

  15 NAV08B   1442 2005   .92  .91  .94  .96  .96  .96  .96  .96  .95  .92  .92

  16 NAV18A   1741 2005   .93  .91  .92  .84  .84  .95  .94  .92  .91  .89  .87

  17 NAV18B   1663 2005   .93  .87  .87  .89  .90  .93  .94  .94  .92  .88  .87

  18 NAV22A   1341 2005   .94  .93  .96  .95  .94  .96  .95  .95  .95  .93  .93

  19 NAV22B   1314 2000   .94  .93  .95  .95  .94  .96  .95  .92  .91  .91  .91

  22 NAV33A   1287 1860   .95  .91  .90  .92  .90

  23 NAV35A   1365 1990   .86  .92  .95  .95  .95  .96  .95  .92  .90  .78

  24 NAV37A   1397 2000   .94  .93  .94  .95  .94  .94  .93  .92  .93  .75  .75

 Av segment correlation   .91  .90  .91  .92  .92  .94  .93  .93  .92  .89  .90

 PART 7:  DESCRIPTIVE STATISTICS: Navajo Canyon                                                    16:42  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 NAV02A   1370 1670    301     12      0    .849    .39   1.49   .235   .588   .436   2.78   .421  -.015   1

   2 NAV02B   1407 1750    344     14      0    .840    .41   2.36   .345   .723   .513   2.81   .457  -.067   1

   3 NAV03A   1590 2005    416     17      0    .893    .48   1.75   .304   .413   .605   2.71   .423  -.068   1

   4 NAV03B   1531 2005    475     19      0    .848    .49   1.83   .307   .501   .575   2.77   .397  -.066   1

   5 NAV04A1  1520 1562     43      1      0    .865    .82   1.69   .361   .357   .459   2.59   .505  -.037   1

   6 NAV04A2  1570 2005    436     18      0    .886    .43   2.07   .314   .524   .617   2.84   .471  -.025   1

   7 NAV04B   1663 2005    343     14      0    .858    .35   1.48   .218   .331   .616   2.78   .469  -.054   1

   8 NAV05A   1428 1750    323     13      0    .889    .40   2.44   .417   .741   .647   2.64   .400  -.041   1

   9 NAV05B   1411 1750    340     14      0    .838    .47   2.40   .446   .743   .620   2.70   .423  -.025   1

  10 NAV06A   1564 2005    442     18      0    .821    .38   2.24   .359   .769   .548   2.58   .420  -.040   1

  11 NAV06B   1545 2005    461     19      0    .858    .50   2.35   .408   .769   .504   2.65   .469  -.025   2

  12 NAV07A   1393 1800    408     17      0    .897    .31   2.00   .264   .617   .643   2.76   .439  -.025   1

  13 NAV07B   1372 1820    449     18      0    .904    .32   1.18   .211   .515   .615   2.60   .344  -.031   1

  14 NAV08A   1454 2005    552     22      0    .926    .41   2.80   .329   .615   .640   2.68   .387  -.051   1

  15 NAV08B   1442 2005    564     23      0    .909    .42   2.52   .339   .628   .630   2.66   .387  -.048   1

  16 NAV18A   1741 2005    265     11      0    .896    .50   2.33   .349   .403   .684   2.60   .442  -.050   1

  17 NAV18B   1663 2005    343     14      0    .887    .45   1.32   .285   .340   .682   2.71   .437  -.050   1

  18 NAV22A   1341 2005    665     27      0    .909    .39   1.56   .233   .476   .569   2.57   .384  -.043   1

  19 NAV22B   1314 2000    687     28      0    .901    .43   2.60   .286   .520   .571   2.62   .371  -.046   1

  20 NAV27A   1230 1470    241      9      0    .839    .51   2.24   .357   .468   .584   2.56   .359  -.034   1

  21 NAV29A   1248 1460    213      9      0    .810    .51   2.31   .422   .595   .576   2.51   .342  -.077   1

  22 NAV33A   1287 1860    574     23      0    .874    .30   1.58   .211   .585   .612   2.60   .391  -.044   1

  23 NAV35A   1365 1990    626     25      0    .880    .42   2.38   .317   .606   .615   2.83   .408  -.044   1

  24 NAV37A   1397 2000    604     25      0    .873    .41   1.38   .254   .569   .541   2.57   .358  -.041   1

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

 Total or mean:          10115    410      0    .878    .42   2.80   .305   .568   .592   2.84   .406  -.043

