Guilford Center Meeting House historical, Vermont - vt009 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 Guilford Center Meeting House in VT by C. Baisan. Construction was in 1789. It was moved and repaired in 1837 using local timber (hemlock). 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 : VT009.CRN Measurement file name : VT009.RWL Date checked : 29JAN13 Checked by : B. Bauer Beginning year : 1453 Ending year : 1834 Principal investigators: C. Baisan Site name : Guilford Center Meeting House historical Site location : Vermont Species information : TSCA EASTERN HEMLOCK Latitude : 4248 Longitude : -7237 Elevation : M Series intercorrelation: 0.593 Avg mean sensitivity : 0.253 Avg standard deviation : 0.268 Avg autocorrelation : 0.796 Number dated series : 3 Segment length tested : 50 Number problem segments: 0 Pct problem segments : 0.00 PART 5: CORRELATION OF SERIES BY SEGMENTS: Guilford Center Meeting House histor 09:35 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 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1499 1524 1549 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 GCM11 1696 1834 .37 .42 .50 .43 2 GCM15a 1453 1790 .80 .75 .76 .64 .41 .46 .69 .67 .56 .61 .68 .61 .46 3 GCM15b 1454 1771 .80 .75 .76 .64 .41 .46 .69 .67 .56 .54 .61 .68 Av segment correlation .80 .75 .76 .64 .41 .46 .69 .67 .56 .51 .57 .59 .44 PART 7: DESCRIPTIVE STATISTICS: Guilford Center Meeting House historical 09:35 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 GCM11 1696 1834 139 4 0 .396 .81 1.52 .252 .772 .157 2.82 .521 -.046 2 2 GCM15a 1453 1790 338 13 0 .613 .53 1.71 .316 .847 .281 2.50 .358 -.026 2 3 GCM15b 1454 1771 318 12 0 .629 .48 1.44 .224 .753 .266 2.57 .279 -.010 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 795 29 0 .593 .56 1.71 .268 .796 .253 2.82 .355 -.023