Alander Mountain, Massachusetts - ma018 Additional Site Information E. Cook P. Krusic 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 along Alander Mountain in western MA by E. Cook. Given the basic life-history traits and growth patterns of eastern hemlock, it is best to consider detrending these raw data with closed-canopy or forest interior conditions in mind. 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 : MA018.CRN Measurement file name : MA018.RWL Date checked : 29JAN13 Checked by : B. Bauer Beginning year : 1628 Ending year : 1987 Principal investigators: E. Cook P. Krusic Site name : Alander Mountain Site location : Mass. Species information : TSCA EASTERN HEMLOCK Latitude : 4205 Longitude : -7230 Elevation : M Series intercorrelation: 0.577 Avg mean sensitivity : 0.244 Avg standard deviation : 0.440 Avg autocorrelation : 0.792 Number dated series : 7 Segment length tested : 50 Number problem segments: 0 Pct problem segments : 0.00 PART 5: CORRELATION OF SERIES BY SEGMENTS: Alander Mountain 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 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 AL07W 1688 1987 .56 .52 .50 .52 .65 .61 .49 .61 .60 .48 .73 .69 2 AL07S 1697 1987 .52 .55 .57 .61 .63 .68 .66 .62 .61 .61 .73 .66 3 AL12E 1680 1987 .56 .57 .64 .62 .66 .62 .65 .65 .61 .61 .70 .54 4 AL12W 1628 1987 .58 .62 .52 .51 .39 .49 .56 .68 .58 .40 .68 .67 5 AL14W 1713 1987 .47 .45 .51 .50 .51 .63 .81 .67 .50 .74 .74 6 AL15W 1787 1987 .61 .67 .61 .75 .71 .54 .70 .60 7 AL16W 1718 1987 .58 .61 .49 .40 .54 .62 .65 .52 .38 .60 .54 Av segment correlation .56 .55 .55 .54 .55 .59 .60 .68 .61 .50 .70 .63 PART 7: DESCRIPTIVE STATISTICS: Alander Mountain 09:35 Tue 29 Jan 2013 Page 7 ----------------------------------------------------------------------------------------------------------------------------------- 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 AL07W 1688 1987 300 12 0 .573 .64 2.14 .392 .811 .250 2.65 .427 -.014 3 2 AL07S 1697 1987 291 12 0 .619 .83 2.19 .379 .779 .235 2.72 .328 -.020 3 3 AL12E 1680 1987 308 12 0 .600 .65 2.35 .440 .827 .258 2.60 .380 -.021 1 4 AL12W 1628 1987 360 12 0 .554 .74 4.02 .561 .761 .279 2.72 .319 -.029 1 5 AL14W 1713 1987 275 11 0 .600 .79 2.50 .416 .828 .218 2.64 .386 -.049 2 6 AL15W 1787 1987 201 8 0 .590 .85 1.92 .345 .648 .258 2.82 .379 -.018 1 7 AL16W 1718 1987 270 11 0 .506 1.10 2.67 .493 .854 .203 2.50 .297 -.045 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2005 78 0 .577 .79 4.02 .440 .792 .244 2.82 .358 -.028