Sycamore Grove Park, California Valley Oak - CA635 Additional Site Information John C. King Purpose of Collection: Sycamore mortality event Detrend method: Negative exponontial or linear regression with negative or 0 slope Cores are stored at: Lone Pine Research 2604 Westridge Drive Bozeman, MT 59715 406-522-0694 For access to samples, contact: Zone 7 Water Agency 5997 Parkside Drive Pleasanton, CA 94588-5127 925-484-2600 LARPD Livermore Area Recreation and Park District 71 Trevarno Road Livermore, California 94551-4931 925-373-5700 Reference: Technical reports regarding Sycamore Grove Park are retained by: Zone 7 Water Agency 5997 Parkside Drive Pleasanton, CA 94588-5127 925-484-2600 LARPD Livermore Area Recreation and Park District 71 Trevarno Road Livermore, California 94551-4931 925-373-5700 Tree-ring research was conducted to investigate a late 1980s sycamore mortality event at Sycamore Grove Park, Livermore, CA. The assembled sycamore chronology contains a 1985-1993 growth suppression that coincides with the mortality event, and is associated with both climatic and non-climatic factors. Cross-dating was confirmed by comparison to on-site valley oak records as well as regional ITRDB chronologies. COFECHA output: Chronology file name : CA635.CRN Measurement file name : CA635.RWL Date checked : 25MAY06 Checked by : B. Bauer Beginning year : 1896 Ending year : 2003 Principal investigators: John C. King Site name : Sycamore Grove Park Site location : California Species information : QULO VALLEY OAK Latitude : +3738 Longitude : -12146 Elevation : 149M Series intercorrelation: 0.625 Avg mean sensitivity : 0.266 Avg standard deviation : 1.378 Avg autocorrelation : 0.654 Number dated series : 22 Segment length tested : 50 Number problem segments: 3 Pct problem segments : 4.23 PART 5: CORRELATION OF SERIES BY SEGMENTS: Sycamore Grove Park Valley Oak 11:18 Thu 25 May 2006 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 sg142a 1913 2003 .79 .65 .76 .73 2 sg142b 1925 2003 .70 .78 .77 3 sg143a 1896 2003 .66 .57 .73 .75 4 sg143b 1912 2003 .75 .56 .66 .65 5 sg145a 1976 2003 .56 6 sg145b 1940 2003 .65 .68 .65 7 sg146a 1938 2003 .76 .80 .83 8 sg146b 1939 2003 .69 .80 .79 9 sg147a 1949 2003 .49 .48 .48 10 sg147b 1938 2003 .49 .65 .61 11 sg233a 1929 2003 .63 .68 .54 12 sg233b 1944 2003 .68 .69 .68 13 sg234a 1914 2003 .56 .50 .62 .61 14 sg234b 1935 2003 .70 .69 .68 15 sg235a 1937 2003 .68 .67 .64 16 sg235b 1934 2003 .54 .48 .42 17 sg236a 1941 2003 .81 .78 .71 18 sg236b 1922 2003 .70 .65 .77 .78 19 sg237a 1913 2003 .51 .25A .65 .64 20 sg237b 1940 2003 .30A .45 .38 21 sg238a 1912 2003 .63 .37 .48 .52 22 sg238b 1927 2003 .30A .56 .56 Av segment correlation .66 .57 .66 .64 PART 7: DESCRIPTIVE STATISTICS: Sycamore Grove Park Valley Oak 11:18 Thu 25 May 2006 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 sg142a 1913 2003 91 4 0 .771 3.17 7.61 1.799 .761 .280 2.46 .318 -.054 1 2 sg142b 1925 2003 79 3 0 .720 3.87 8.15 1.555 .697 .236 2.94 .706 .098 1 3 sg143a 1896 2003 108 4 0 .697 3.08 8.12 1.386 .773 .245 2.77 .463 -.048 1 4 sg143b 1912 2003 92 4 0 .757 2.93 5.20 .983 .575 .256 2.45 .302 -.039 1 5 sg145a 1976 2003 28 1 0 .560 2.38 4.93 .985 .232 .355 2.78 .599 -.103 1 6 sg145b 1940 2003 64 3 0 .622 3.36 8.44 1.327 .722 .214 2.88 .587 .044 1 7 sg146a 1938 2003 66 3 0 .767 4.77 7.14 1.473 .600 .233 2.76 .589 .061 1 8 sg146b 1939 2003 65 3 0 .704 4.55 7.80 1.615 .640 .247 2.58 .399 .001 1 9 sg147a 1949 2003 55 3 0 .479 3.52 8.09 1.850 .655 .328 2.90 .557 -.009 1 10 sg147b 1938 2003 66 3 0 .491 4.38 8.17 1.891 .745 .274 2.72 .580 -.003 1 11 sg233a 1929 2003 75 3 0 .553 4.26 6.60 1.054 .566 .190 2.62 .492 -.096 2 12 sg233b 1944 2003 60 3 0 .669 3.94 7.63 1.172 .524 .226 2.74 .486 -.023 1 13 sg234a 1914 2003 90 4 0 .554 3.39 8.52 1.573 .629 .296 2.98 .521 -.034 1 14 sg234b 1935 2003 69 3 0 .692 4.08 8.56 1.702 .631 .280 2.73 .513 -.048 1 15 sg235a 1937 2003 67 3 0 .677 2.35 5.95 1.215 .523 .361 2.97 .569 .046 1 16 sg235b 1934 2003 70 3 0 .498 1.93 4.78 1.078 .697 .315 3.06 .633 .015 1 17 sg236a 1941 2003 63 3 0 .728 4.27 10.09 1.774 .769 .232 2.59 .527 -.063 2 18 sg236b 1922 2003 82 4 0 .727 3.08 6.75 1.273 .707 .279 2.74 .563 -.044 2 19 sg237a 1913 2003 91 4 1 .558 2.02 4.24 .886 .674 .276 2.62 .514 .014 1 20 sg237b 1940 2003 64 3 1 .345 1.64 2.76 .618 .698 .247 2.95 .535 -.022 2 21 sg238a 1912 2003 92 4 0 .586 2.93 9.77 1.685 .676 .303 2.70 .374 .003 2 22 sg238b 1927 2003 77 3 1 .471 3.18 8.92 1.302 .561 .236 2.90 .429 -.041 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1614 71 3 .625 3.30 10.09 1.378 .654 .266 3.06 .501 -.015