Knoppers Ford, Arkansas - AR082 Additional Site Information D. Stevenson T. Lynch R. Heineman R. Holeman D. Wilson K. Anderson and J. Guldin Purpose of Collection: Climatology - severe weather Detrending: First - Negative exponential or linear regression of any slope Second - Negative exponential or linear regression of any slope Cores are stored at: Oklahoma State University Department of Natural Resources and Environmental Management Notes: The site is a rocky hillside in a draw. Soils are moist most of the time. Aspect is south and west; slopes from 20 to 50 Site was burned in the dormant season of 1936/1937. This is part of a growth-and- yield study ongoing since 1987 with updates at +/- 5-year intervals. The site sustained medium damage in the Christmas 2000 ice storm. Chronology produced using ARSTAN. Missing values are represented by -8888 in the ringwidth data file Reference: Douglas J. Stevenson, Thomas B. Lynch, Pradip Saud, Robert Heineman, Randal Holeman, Dennis Wilson, Keith Anderson, Chris Cerny, James M. Guldin. 2016. Winter in the Ouchitas - A severe winter storm signature in Pinus echinata in the Ouachita Mountains of Oklahoma and Arkansas, USA. Dendrochronologia, 37, 107-115. doi: 10.1016/j.dendro.2016.01.001 COFECHA output: Chronology file name : AR082.CRN Measurement file name : AR082.RWL Date checked : 26AUG14 Checked by : B. Bauer Beginning year : 1923 Ending year : 2007 Principal investigators: D. Stevenson T. Lynch R. Heineman R. Holeman D. Wilson K. Anderson and J. Guldin Site name : Knoppers Ford Site location : Arkansas Species information : PIEC SHORTLEAF PINE Latitude : 3500 Longitude : -09351 Elevation : 231M Series intercorrelation: 0.641 Avg mean sensitivity : 0.325 Avg standard deviation : 0.877 Avg autocorrelation : 0.471 Number dated series : 22 Segment length tested : 50 Number problem segments: 2 Pct problem segments : 2.99 PART 5: CORRELATION OF SERIES BY SEGMENTS: Knoppers Ford 16:17 Tue 26 Aug 2014 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 1900 1925 1950 1975 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 p170t001 1931 2007 .81 .83 .78 2 p170t002 1936 2007 .82 .82 .74 3 p170t004 1931 2007 .08B .83 .79 4 p170t008 1925 2007 .83 .78 .73 5 p170t020 1929 2007 .72 .78 .55 6 p170t027 1929 2007 .80 .78 .74 7 p170t28A 1930 2007 .66 .71 .66 8 p170t28B 1930 2007 .72 .77 .75 9 p170t029 1930 2007 .73 .81 .73 10 p170t030 1930 2007 .66 .66 .52 11 p171t002 1932 2007 .74 .85 .81 12 p171t004 1935 2007 .67 .68 .65 13 p171t015 1926 1998 .54 .14B 14 p171t016 1929 2007 .62 .60 .49 15 p171t024 1947 2007 .78 .80 .79 16 p172t001 1926 2007 .75 .60 .50 17 p172t002 1929 2007 .75 .77 .73 18 p172t005 1928 2007 .83 .78 .69 19 p172t008 1923 2007 .69 .69 .75 .69 20 p172t031 1923 2007 .67 .67 .71 .57 21 p172t036 1925 2007 .64 .68 .61 22 p173t002 1930 2007 .80 .80 .65 Av segment correlation .68 .70 .72 .67 PART 7: DESCRIPTIVE STATISTICS: Knoppers Ford 16:17 Tue 26 Aug 2014 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 p170t001 1931 2007 77 3 0 .764 2.27 4.99 .859 .199 .373 2.72 .488 .015 1 2 p170t002 1936 2007 72 3 0 .757 1.82 9.39 1.275 .490 .343 2.91 .507 -.073 1 3 p170t004 1931 2007 77 3 1 .200 2.41 6.09 1.900 .250 .390 2.26 .269 -.030 1 4 p170t008 1925 2007 83 3 0 .769 1.69 3.65 .801 .728 .283 2.76 .592 -.070 3 5 p170t020 1929 2007 79 3 0 .591 2.13 4.21 .692 .527 .258 2.56 .437 -.030 1 6 p170t027 1929 2007 79 3 0 .729 2.27 4.02 .641 .245 .291 2.78 .611 .002 1 7 p170t28A 1930 2007 78 3 0 .650 2.53 6.49 .982 .633 .257 2.70 .558 .022 4 8 p170t28B 1930 2007 78 3 0 .724 2.31 4.85 .856 .402 .316 2.84 .593 -.059 3 9 p170t029 1930 2007 78 3 0 .708 1.71 3.54 .762 .666 .308 2.73 .593 -.029 1 10 p170t030 1930 2007 78 3 0 .563 1.52 3.29 .537 .433 .292 2.81 .515 -.048 1 11 p171t002 1932 2007 76 3 0 .758 1.36 2.73 .636 .591 .343 2.74 .663 .054 1 12 p171t004 1935 2007 73 3 0 .642 1.37 7.56 1.058 .561 .295 2.79 .534 .083 1 13 p171t015 1926 1998 73 2 1 .249 .83 3.42 1.784 .555 .454 2.44 .329 .173 1 14 p171t016 1929 2007 79 3 0 .627 1.67 3.66 .862 .643 .367 2.57 .516 -.045 2 15 p171t024 1947 2007 61 3 0 .773 1.71 4.02 .752 .549 .343 2.75 .628 .070 1 16 p172t001 1926 2007 82 3 0 .545 1.66 4.83 .709 .461 .322 2.71 .439 -.024 1 17 p172t002 1929 2007 79 3 0 .741 1.91 4.04 .858 .374 .421 2.79 .550 .045 1 18 p172t005 1928 2007 80 3 0 .728 1.86 7.20 .852 .303 .273 3.30 .667 .072 1 19 p172t008 1923 2007 85 4 0 .676 1.51 3.39 .640 .372 .351 3.00 .601 -.004 1 20 p172t031 1923 2007 85 4 0 .632 1.60 4.50 .607 .385 .309 2.62 .433 .022 1 21 p172t036 1925 2007 83 3 0 .603 1.45 2.59 .488 .538 .257 2.79 .453 -.027 1 22 p173t002 1930 2007 78 3 0 .687 1.72 6.19 .915 .484 .328 3.08 .528 .022 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1713 67 2 .641 1.79 9.39 .877 .471 .325 3.30 .522 .005