Driftless Oaks Merritt Forest Preserve update, Iowa - IA036 Additional Site Information Evan Larson, Sara Allen, Chris Underwood Reference: Evan R. Larson, Sara A. Allen, Chris A. Underwood. 2020. The Driftless Oaks: A new network of tree-ring chronologies to improve regional perspectives of drought in the Upper Midwest, USA. Progress in Physical Geography, Vol. 45, Issue 3, pp. 375-406, June 2021. doi: 10.1177/0309133320960670 Notes: Merritt Forest Preserve update: 42.71N, 91.106W, 282m. Funding Sources: University of Wisconsin Water Resources Institute, University of Wisconsin - Platteville Pioneer Academic Center for Community Engangement WR13R003 COFECHA output: Chronology file name : IA036.CRN Measurement file name : IA036.RWL Date checked : 09AUG21 Checked by : B. Bauer Beginning year : 1843 Ending year : 2017 Principal investigators: E. Larson S. Allen C. Underwood Site name : Driftless Oaks Merritt Forest Preserve update Site location : Iowa Species information : QUAL WHITE OAK Latitude : 4243 Longitude : -09106 Elevation : 282M Series intercorrelation: 0.656 Avg mean sensitivity : 0.208 Avg standard deviation : 0.493 Avg autocorrelation : 0.538 Number dated series : 13 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 1.89 PART 5: CORRELATION OF SERIES BY SEGMENTS: Merritt update 15:58 Mon 09 Aug 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 1850 1875 1900 1925 1950 1975 1899 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 MFP003a 1908 2017 .57 .67 .65 .62 2 MFP003b 1983 2017 .58 3 MFP004b 1879 2017 .69 .66 .53 .69 .70 4 MFP005a 1945 2017 .78 .75 .62 5 MFP005b 1930 2017 .78 .73 .72 6 MFP201a 1894 2017 .73 .81 .76 .71 .54 7 MFP201b 1843 2017 .62 .83 .77 .58 .61 .61 8 MFP203c 1853 2017 .68 .86 .85 .75 .72 .68 9 MFP201d 1870 2017 .67 .65 .75 .78 .74 .70 10 MFP203a 1876 2017 .79 .78 .66 .63 .67 11 MFP203b 1890 2017 .58 .51 .28A .43 .49 12 MFP301a 1933 2017 .54 .66 .73 13 MFP301b 1974 2017 .67 Av segment correlation .66 .73 .71 .65 .66 .64 PART 7: DESCRIPTIVE STATISTICS: Merritt update 15:58 Mon 09 Aug 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 MFP003a 1908 2017 110 4 0 .588 1.97 3.64 .476 .573 .165 2.58 .329 -.075 1 2 MFP003b 1983 2017 35 1 0 .575 2.29 3.95 .485 .250 .210 3.00 .639 .037 1 3 MFP004b 1879 2017 139 5 0 .654 1.68 3.54 .539 .611 .218 2.85 .480 .005 1 4 MFP005a 1945 2017 73 3 0 .687 2.91 5.25 .736 .397 .225 2.75 .548 -.018 1 5 MFP005b 1930 2017 88 3 0 .763 2.31 4.15 .529 .227 .224 2.80 .550 -.001 1 6 MFP201a 1894 2017 124 5 0 .649 1.41 2.50 .440 .681 .195 2.71 .491 .013 1 7 MFP201b 1843 2017 175 6 0 .652 1.37 2.78 .456 .623 .221 2.62 .454 .040 1 8 MFP203c 1853 2017 165 6 0 .723 1.66 3.26 .522 .623 .216 2.62 .448 .075 1 9 MFP201d 1870 2017 148 6 0 .710 1.31 2.42 .385 .685 .187 2.53 .358 -.011 1 10 MFP203a 1876 2017 142 5 0 .710 1.71 3.04 .390 .407 .199 2.51 .430 -.006 1 11 MFP203b 1890 2017 128 5 1 .486 1.52 3.26 .456 .520 .201 2.65 .480 -.053 1 12 MFP301a 1933 2017 85 3 0 .597 1.81 5.50 .704 .465 .248 2.85 .507 -.012 1 13 MFP301b 1974 2017 44 1 0 .672 1.85 3.51 .493 .375 .229 2.68 .567 .047 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1456 53 1 .656 1.72 5.50 .493 .538 .208 3.00 .461 .004