Dahllia, Tunisia - tuni002 Additional Site Information Ramzi Touchan Measurement type: Total ring width Purpose of Collection: Climatology - precipitation analyses Location of core material: Laboratory of Tree-Ring Research, The University of Arizona References: Touchan, R., K.J. Anchukaitis, D.M. Meko, M. Sabir, S. Attalah, and A. Aloui. 2010. Spatiotemporal drought variability in northwestern Africa over the last nine centuries. Climate Dynamics, DOI: 10.1007/s00382-010-0804-4 Touchan, R., D.M. Meko, and A. Aloui. 2008. Precipitation reconstruction for Northwestern Tunisia from tree rings Journal of Arid Environments, Vol. 72, pp. 1887-1896. 10.1016/j.jaridenv.2008.05.010 Touchan, R., K.J. Anchukaitis, D.M. Meko, S. Attalah, C. Baisan, and A. Aloui. 2008. Long term context for recent drought in northwestern Africa. Geophys. Res. Lett., 35, L13705, doi:10.1029/2008GL034264. COFECHA output: Chronology file name : TUNI002.CRN Measurement file name : TUNI002.RWL Date checked : 03NOV10 Checked by : B. Bauer Beginning year : 1890 Ending year : 2003 Principal investigators: Ramzi Touchan Site name : Dahllia Site location : Tunisia Species information : PIHA ALEPPO PINE Latitude : 3614 Longitude : 00826 Elevation : 950M Series intercorrelation: 0.706 Avg mean sensitivity : 0.370 Avg standard deviation : 0.986 Avg autocorrelation : 0.642 Number dated series : 19 Segment length tested : 50 Number problem segments: 1 Pct problem segments : 1.28 PART 5: CORRELATION OF SERIES BY SEGMENTS: Dahllia 16:14 Wed 03 Nov 2010 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 1875 1900 1925 1950 1975 1924 1949 1974 1999 2024 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 DHA01A 1890 2001 .66 .78 .83 .73 .71 2 DHA01B 1896 2002 .81 .83 .88 .79 .79 3 DHA02A 1899 2001 .69 .69 .68 .58 .58 4 DHA02B 1900 1987 .58 .51 .36B 5 DHA03 1910 2001 .72 .73 .71 .70 6 DHA04B 1896 2002 .72 .78 .74 .38 .35 7 DHA05A 1951 2002 .75 .78 8 DHA06A 1947 2002 .67 .65 .65 9 DHA06B 1945 2002 .68 .63 .64 10 DHA07A 1906 2002 .82 .86 .88 .81 11 DHA07B 1916 2001 .83 .78 .80 .80 12 DHA08A 1905 2002 .84 .86 .84 .78 13 DHA08B 1906 2003 .66 .72 .77 .80 14 DHA09A 1897 1998 .65 .61 .59 .65 15 DHA09B 1898 2002 .76 .75 .80 .73 .74 16 DHA10A 1910 2002 .67 .77 .82 .81 17 DHA10B 1906 2002 .55 .60 .82 .83 18 DHA11A 1895 2002 .67 .64 .62 .62 .65 19 DHA11B 1893 2002 .69 .73 .84 .77 .78 Av segment correlation .71 .72 .73 .70 .72 PART 7: DESCRIPTIVE STATISTICS: Dahllia 16:14 Wed 03 Nov 2010 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 DHA01A 1890 2001 112 5 0 .717 1.85 5.66 1.374 .885 .300 2.60 .457 .027 1 2 DHA01B 1896 2002 107 5 0 .806 1.93 4.40 .994 .813 .287 2.65 .460 -.003 2 3 DHA02A 1899 2001 103 5 0 .637 1.92 6.91 1.436 .848 .404 2.57 .411 -.047 1 4 DHA02B 1900 1987 88 3 1 .414 1.99 6.65 1.426 .834 .356 2.74 .549 .014 1 5 DHA03 1910 2001 92 4 0 .710 1.49 4.97 1.198 .811 .419 2.64 .460 .004 1 6 DHA04B 1896 2002 107 5 0 .562 1.84 5.31 1.021 .527 .398 2.84 .426 -.022 1 7 DHA05A 1951 2002 52 2 0 .755 2.40 6.79 1.288 .556 .392 2.84 .562 .083 2 8 DHA06A 1947 2002 56 3 0 .681 1.61 4.53 .875 .510 .406 2.93 .683 .038 1 9 DHA06B 1945 2002 58 3 0 .695 2.61 4.83 .965 .392 .334 2.55 .500 -.024 1 10 DHA07A 1906 2002 97 4 0 .811 1.39 3.72 .772 .615 .398 2.90 .533 .063 1 11 DHA07B 1916 2001 86 4 0 .812 1.15 3.27 .652 .539 .429 2.91 .635 -.062 2 12 DHA08A 1905 2002 98 4 0 .810 1.28 4.89 .746 .560 .363 2.74 .449 -.044 4 13 DHA08B 1906 2003 98 4 0 .722 1.78 4.63 .832 .474 .392 2.75 .491 .014 2 14 DHA09A 1897 1998 102 4 0 .683 1.12 4.22 .879 .697 .439 2.73 .422 -.004 3 15 DHA09B 1898 2002 105 5 0 .757 1.40 4.96 .920 .664 .388 2.82 .609 -.030 3 16 DHA10A 1910 2002 93 4 0 .742 1.29 4.98 .631 .495 .308 2.72 .437 .020 2 17 DHA10B 1906 2002 97 4 0 .685 1.22 3.99 .627 .565 .298 2.91 .580 .010 2 18 DHA11A 1895 2002 108 5 0 .661 1.67 7.31 1.376 .712 .388 2.75 .531 -.057 3 19 DHA11B 1893 2002 110 5 0 .754 1.24 5.31 .714 .479 .354 2.87 .439 -.060 3 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1769 78 1 .706 1.60 7.31 .986 .642 .370 2.93 .499 -.007