Evan's Farm Barn historical, Vermont - vt012
Additional Site Information
C. Baisan 


Reference:
Pederson, N., A.R. Bell, E.R. Cook, U. Lall, N. Devineni, 
R. Seager, K. Eggleston, and K.J. Vranes. In press 2013. 
Is an Epic Pluvial Masking the Water Insecurity 
of the Greater New York City Region? 
Journal of Climate, Early Online Release 2012 
doi: http://dx.doi.org/10.1175/JCLI-D-11-00723.1 


Notes: 
This collection of Tsuga canadensis raw ring widths was made 
from the Evan's Farm Barn in Guilford, VT by C. Baisan. 
Construction was in ~1803 and composed of local timber.

While we cannot say much about the original forest from which 
these timbers originated, it is not a stretch to consider 
detrending these raw data with closed-canopy or forest interior 
conditions in mind given eastern hemlock’s basic life-history 
traits and typical growth patterns.

For the Pederson et al. (2012) paper, these data were combined 
with the Pack Forest (Tsuga canadensis) data that are accessible 
in the ITRDB.


COFECHA output: 


      Chronology file name   : VT012.CRN
      Measurement file name  : VT012.RWL
      Date checked           : 29JAN13
      Checked by             : B. Bauer
      Beginning year         : 1586
      Ending year            : 1809
      Principal investigators: C. Baisan                               
      Site name              : Evan's Farm Barn historical
      Site location          : Vermont      
      Species information    : TSCA EASTERN HEMLOCK
      Latitude               :   4248
      Longitude              : -7236 
      Elevation              :     M

      Series intercorrelation: 0.459
      Avg mean sensitivity   : 0.202
      Avg standard deviation : 0.259
      Avg autocorrelation    : 0.753
      Number dated series    : 2
      Segment length tested  : 50

      Number problem segments: 0
      Pct problem segments   : 0.00


 PART 5:  CORRELATION OF SERIES BY SEGMENTS: Evan's Farm Barn historical                           09:39  Tue 29 Jan 2013  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   1650 1675 1700 1725 1750
                         1699 1724 1749 1774 1799
 --- -------- ---------  ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
   1 EFB11    1586 1798   .51  .46  .43  .49  .42
   2 EFB12    1670 1809   .51  .46  .43  .49  .42
 Av segment correlation   .51  .46  .43  .49  .42
 PART 7:  DESCRIPTIVE STATISTICS: Evan's Farm Barn historical                                      09:39  Tue 29 Jan 2013  Page   8
 -----------------------------------------------------------------------------------------------------------------------------------

                                                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 EFB11    1586 1798    213      5      0    .459    .69   1.49   .266   .799   .221   2.59   .398   .031   1
   2 EFB12    1670 1809    140      5      0    .459    .92   1.76   .249   .682   .174   2.59   .436   .040   2
 --- -------- ---------  -----  -----  -----   ------ -----  -----  -----  -----  -----  -----  -----  -----  --
 Total or mean:            353     10      0    .459    .78   1.76   .259   .753   .202   2.59   .413   .034