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

