Howland Forest, Maine - ME044 Additional Site Information R. Stockton Maxwell Soumaya Belmecheri Alan H. Taylor References: R. Stockton Maxwell, Soumaya Belmecheri, Alan H. Taylor, Kenneth J. Davis, Troy W. Ocheltree. 2020. Carbon isotope ratios in tree rings respond differently to climatic variations than tree-ring width in a mesic temperate forest. Agricultural and Forest Meteorology, Vol. 288-289, 108014. DOI: 10.1016/j.agrformet.2020.108014 Maxwell, R.S., Belmecheri, S., Taylor, A.H., Davis, K.J., Guerrieri, R., Moore, D.J., Rayback, S.A.. 2021 in press. Global Change Biology, in press. Notes: New England Hemlock Transect, 10 sites along a 500+ km transect stretching from CT to ME. Data collected for Project "Estimating Forest Productivity Over Regional and Multi-Decadal Time Scales Using Carbon Isotopes in Tree Rings." While the larger project focused on carbon isotopes, here we present tree-ring width data associated with the project. Keywords: carbon isotopes, climate response, dendrochronology, forest productivity Funding: US National Science Foundation BCS-1229887 COFECHA output: Chronology file name : ME044.CRN Measurement file name : ME044.RWL Date checked : 08JAN21 Checked by : B. Bauer Beginning year : 1780 Ending year : 2012 Principal investigators: R. Stockton Maxwell Soumaya Belmecheri Alan H. Taylor Site name : Howland Forest Site location : Maine Species information : TSCA EASTERN HEMLOCK Latitude : 4512 Longitude : -06844 Elevation : 60M Series intercorrelation: 0.582 Avg mean sensitivity : 0.234 Avg standard deviation : 0.565 Avg autocorrelation : 0.879 Number dated series : 42 Segment length tested : 50 Number problem segments: 19 Pct problem segments : 7.34 PART 5: CORRELATION OF SERIES BY SEGMENTS: Howland Forest 07:53 Fri 08 Jan 2021 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 1775 1800 1825 1850 1875 1900 1925 1950 1975 1824 1849 1874 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 HOW01A 1877 2012 .71 .65 .66 .72 .76 2 HOW01B 1926 2012 .40 .57 .60 3 HOW02A 1858 2012 .54 .70 .75 .70 .85 .88 4 HOW02B 1837 2012 .36 .46 .58 .58 .64 .80 .82 5 HOW03A 1922 2012 .50 .49 .61 .67 6 HOW03B 1881 2012 .60 .54 .53 .53 .56 7 HOW04A 1891 2012 .38 .51 .59 .69 .69 8 HOW04B 1867 2012 .63 .67 .55 .52 .59 .65 9 HOW05A 1829 2012 .49 .39 .46 .68 .68 .68 .78 10 HOW05B 1817 2012 .13B .17B .04B .35 .66 .66 .77 .76 11 HOW06A 1873 2012 .60 .63 .64 .51 .55 .65 12 HOW06B 1829 2012 .40 .36 .57 .64 .53 .66 .72 13 HOW07A 1895 2012 .57 .60 .61 .70 .72 14 HOW07B 1883 2012 .44 .57 .68 .79 .76 15 HOW08A 1932 2012 .45 .68 .75 16 HOW08B 1903 2012 .42 .29A .56 .66 17 HOW09A 1858 2012 .49 .56 .53 .49 .48 .44 18 HOW09B 1891 2012 .32A .34 .54 .62 .65 19 HOW10A 1867 2012 .55 .55 .58 .55 .61 .64 20 HOW10B 1867 2012 .26A .21A .31B .27A .51 .74 21 HOW21A 1807 2012 .49 .47 .39 .47 .34B .46 .76 .73 22 HOW21B 1792 2012 .45 .62 .55 .38 .59 .46 .50 .73 .75 23 HOW22B 1817 2012 .32A .49 .45 .59 .52 .62 .68 .74 24 HOW22D 1828 2012 .37 .52 .41 .03B .32B .47 .37 25 HOW23A 1799 2012 .54 .55 .58 .41 .55 .54 .58 .73 .79 26 HOW23B 1780 2012 .43 .56 .59 .31A .47 .71 .64 .66 .65 27 HOW24A 1853 2012 .53 .61 .67 .69 .66 .75 28 HOW24B 1816 2012 .34B .25B .24B .50 .63 .63 .64 .74 29 HOW25A 1849 2012 .39 .39 .51 .50 .50 .49 .57 30 HOW25B 1854 2012 .43 .63 .59 .71 .79 .81 31 HOW26B 1858 2012 .33 .64 .56 .40 .65 .68 32 HOW26D 1878 2012 .66 .64 .59 .63 .66 33 HOW27A 1851 2012 .36 .48 .69 .47 .54 .59 34 HOW27B 1828 2012 .33 .43 .38B .42 .64 .75 .73 35 HOW28A 1802 2012 .63 .57 .63 .68 .67 .61 .57 .56 36 HOW28B 1816 2012 .33 .46 .61 .70 .67 .67 .85 .91 37 HOW29A 1853 2012 .58 .66 .68 .50 .65 .68 38 HOW29B 1928 2012 .59 .55 .64 39 HOW30A 1850 2012 -.01B .39 .53 .65 .75 .72 40 HOW30B 1859 2012 .57 .57 .56 .55 .39 .47 41 HOW31A 1856 2012 .58 .54 .47 .55 .40 .44 42 HOW31B 1859 2012 .42 .38 .39 .59 .65 .70 Av segment correlation .47 .44 .43 .43 .53 .55 .55 .64 .68 PART 7: DESCRIPTIVE STATISTICS: Howland Forest 07:53 Fri 08 Jan 2021 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 HOW01A 1877 2012 136 5 0 .724 1.19 2.80 .619 .904 .228 2.58 .429 -.046 1 2 HOW01B 1926 2012 87 3 0 .518 1.70 3.62 .632 .836 .157 2.70 .393 .054 1 3 HOW02A 1858 2012 155 6 0 .787 .95 2.28 .508 .857 .247 2.51 .368 -.043 1 4 HOW02B 1837 2012 176 7 0 .593 1.12 2.83 .643 .886 .235 2.67 .452 -.018 1 5 HOW03A 1922 2012 91 4 0 .584 1.29 5.22 .845 .898 .163 2.70 .598 -.066 1 6 HOW03B 1881 2012 132 5 0 .560 1.06 3.77 .725 .857 .234 2.60 .406 -.033 3 7 HOW04A 1891 2012 122 5 0 .553 1.21 3.03 .825 .939 .229 2.68 .417 -.007 1 8 HOW04B 1867 2012 146 6 0 .577 1.08 2.87 .641 .909 .219 2.95 .450 -.021 1 9 HOW05A 1829 2012 184 7 0 .614 .66 2.12 .326 .837 .219 2.52 .405 -.010 1 10 HOW05B 1817 2012 196 8 3 .545 .82 2.45 .432 .811 .235 2.80 .408 -.027 2 11 HOW06A 1873 2012 140 6 0 .576 1.14 2.58 .631 .913 .192 2.67 .480 .014 1 12 HOW06B 1829 2012 184 7 0 .568 .70 1.83 .451 .929 .214 2.71 .364 -.071 2 13 HOW07A 1895 2012 118 5 0 .651 1.45 4.33 .887 .884 .283 2.58 .407 .103 1 14 HOW07B 1883 2012 130 5 0 .662 1.19 3.65 .772 .894 .260 2.71 .488 -.081 1 15 HOW08A 1932 2012 81 3 0 .606 1.98 5.30 .807 .783 .175 2.86 .545 -.066 1 16 HOW08B 1903 2012 110 4 1 .568 1.44 3.03 .823 .897 .237 2.49 .385 -.023 1 17 HOW09A 1858 2012 155 6 0 .459 1.10 2.66 .661 .924 .195 2.49 .321 -.012 1 18 HOW09B 1891 2012 122 5 1 .521 1.05 2.44 .573 .928 .198 2.58 .421 .071 1 19 HOW10A 1867 2012 146 6 0 .603 1.06 2.69 .592 .882 .248 2.60 .387 -.050 4 20 HOW10B 1867 2012 146 6 4 .486 1.09 3.26 .661 .896 .250 2.52 .396 -.028 1 21 HOW21A 1807 2012 206 8 1 .545 .73 2.96 .450 .860 .254 2.68 .424 -.042 1 22 HOW21B 1792 2012 221 9 0 .573 .66 2.48 .412 .819 .267 2.60 .387 -.015 1 23 HOW22B 1817 2012 196 8 1 .609 .78 2.21 .482 .895 .231 2.58 .364 .021 1 24 HOW22D 1828 2012 185 7 2 .320 .68 2.11 .467 .929 .251 2.56 .353 .005 1 25 HOW23A 1799 2012 214 9 0 .630 .82 2.21 .438 .867 .221 2.59 .430 -.022 1 26 HOW23B 1780 2012 233 9 1 .552 .73 2.05 .385 .859 .243 2.61 .385 .035 1 27 HOW24A 1853 2012 160 6 0 .679 .84 2.50 .435 .893 .221 2.68 .502 .059 1 28 HOW24B 1816 2012 197 8 3 .563 .99 2.43 .514 .892 .225 2.61 .368 -.046 1 29 HOW25A 1849 2012 164 7 0 .544 1.05 2.36 .460 .787 .260 2.64 .380 -.021 1 30 HOW25B 1854 2012 159 6 0 .705 .79 2.22 .396 .786 .282 2.58 .447 -.060 1 31 HOW26B 1858 2012 155 6 0 .574 .78 2.69 .388 .870 .197 2.54 .347 -.064 1 32 HOW26D 1878 2012 135 5 0 .653 .73 1.64 .370 .896 .192 2.58 .375 -.032 1 33 HOW27A 1851 2012 162 6 0 .540 1.13 3.00 .698 .895 .223 2.70 .365 -.010 1 34 HOW27B 1828 2012 185 7 1 .552 .97 3.53 .613 .894 .254 2.66 .350 -.095 1 35 HOW28A 1802 2012 211 8 0 .602 .71 2.97 .551 .863 .245 2.66 .352 -.076 1 36 HOW28B 1816 2012 197 8 0 .733 .74 3.67 .578 .890 .245 2.57 .344 -.033 1 37 HOW29A 1853 2012 160 6 0 .628 .88 2.34 .481 .823 .253 2.68 .439 -.050 1 38 HOW29B 1928 2012 85 3 0 .626 1.23 3.09 .673 .880 .198 2.69 .423 -.094 1 39 HOW30A 1850 2012 163 6 1 .534 .78 2.67 .643 .935 .238 2.67 .419 .071 2 40 HOW30B 1859 2012 154 6 0 .520 .76 3.67 .682 .885 .247 2.55 .312 -.017 1 41 HOW31A 1856 2012 157 6 0 .503 .97 3.29 .735 .927 .247 2.80 .498 -.048 1 42 HOW31B 1859 2012 154 6 0 .532 .95 2.96 .797 .944 .271 2.71 .421 -.032 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 6610 259 19 .582 .95 5.30 .565 .879 .234 2.95 .404 -.022