Sardine Point, California - CA632 Additional Site Information Dave Meko This chronology is intended for inferring moisture variations at multi-decadal time scales. Ringwidths were detrended by the ratio method, as described by Cook et al. (1990), using a 200-year cubic smoothing spline as the default detrending curve. The amplitude of the frequency response of this spline is 0.50 at a wavelength of 200 years. Time series plots showed ring-width variations at wavelengths longer than 200 years were largely asynchronous across trees. A two-pass approach was taken to detrending. The first pass was automatic initial detrending by the default curve choice. The second pass was optional manual over-riding of the default choice from viewing of superposed time series plots of smoothed indices from multiple trees. This manual step might include truncating an individual ring-width series, deleting it from the chronology, or modifying its curve fit by selecting a more suitable detrending line (e.g., a stiffer spline (Cook and Peters 1981), or a horizontal line instead of a straight line with a negative slope) The final selected detrending curves are listed in table below. Note that the table lists only those ring width series actually used in the chronology; additional ring-width series, masked out in the chronology building, might be included in the .rwl data file sent to the ITRDB. After the trend line was fit, core indices were computed by dividing the ring-width in each year by the value of the fitted trend line. Core indices were then averaged to get tree indices, and tree indices were averaged to get a site index, or standard chronology. Averaging of tree indices for a given year was by the arithmetic mean if fewer than 6 trees; otherwise by a bi-weight mean. The residual chronology was computed in same way as the standard chronology except that autoregressive residuals of core indices were used in place of core indices. The "sample size" listed in attached ".crn" files is the number of TREES sampled each year, not the number of cores. N Core Fit Period Curve fit Persistence 1 SND01A 1721 1999 CS(200yr) AR(2) 0.58 2 SND01B 1692 1999 CS(200yr) AR(3) 0.55 3 SND02A 1860 1999 CS(200yr) AR(2) 0.67 4 SND02B 1866 1999 CS(200yr) AR(3) 0.63 5 SND03A 1482 1999 CS(200yr) AR(2) 0.14 6 SND03B 1525 1998 CS(200yr) AR(3) 0.18 7 SND04A 1492 1999 CS(200yr) AR(3) 0.48 8 SND04B 1481 1822 * CS(200yr) AR(2) 0.27 9 SND05A 1789 1999 CS(200yr) AR(3) 0.10 10 SND05B 1777 1999 CS(200yr) AR(3) 0.30 11 SND07A 1800 1999 CS(200yr) AR(3) 0.14 12 SND07B 1800 1999 CS(200yr) AR(3) 0.10 13 SND08A 1798 1999 CS(200yr) AR(2) 0.11 14 SND08B 1769 1998 CS(200yr) AR(2) 0.19 15 SND09A 1816 1999 CS(200yr) AR(2) 0.16 16 SND09B 1778 1999 CS(200yr) AR(1) 0.12 17 SND09C 1771 1999 CS(150yr) AR(1) 0.10 18 SND10A 1642 1999 CS(200yr) AR(3) 0.33 19 SND10B 1779 1998 CS(200yr) AR(2) 0.30 20 SND11A 1719 1999 CS(150yr) AR(2) 0.20 21 SND11B1 1078 1771 CS(200yr) AR(3) 0.27 22 SND11B2 1806 1999 CS(200yr) AR(2) 0.28 23 SND11C 1010 1525 CS(200yr) AR(3) 0.21 24 SND12A 1324 1963 * CS(200yr) AR(3) 0.09 25 SND12B 1741 1931 * CS(200yr) AR(2) 0.19 26 SND13A 1228 1999 CS(200yr) AR(3) 0.14 27 SND13B 1764 1999 CS(200yr) AR(3) 0.32 28 SND15A 1408 1773 CS(200yr) AR(2) 0.21 29 SND15B 1529 1999 CS(200yr) AR(3) 0.35 30 SND16A 1494 1816 CS(200yr) AR(2) 0.15 31 SND16B 1578 1999 CS(200yr) AR(3) 0.22 32 SND17A 1646 1999 CS(200yr) AR(2) 0.35 33 SND17B 1559 1999 CS(200yr) AR(2) 0.17 34 SND18A 1636 1999 CS(200yr) AR(2) 0.38 35 SND18B 1712 1919 * CS(200yr) AR(2) 0.36 36 SND19B 1586 1999 CS(200yr) AR(3) 0.22 37 SND20A 1552 1819 * CS(200yr) AR(3) 0.10 38 SND20B 1644 1807 * CS(200yr) AR(2) 0.14 39 SND21A 1462 1999 CS(200yr) AR(3) 0.14 40 SND21B1 1561 1694 CS(200yr) AR(1) 0.02 41 SND21B2 1690 1999 CS(200yr) AR(3) 0.34 42 SND23C 1010 1702 CS(200yr) AR(3) 0.22 43 SND24A 1696 1999 CS(200yr) AR(3) 0.31 44 SND24B2 1887 1999 CS(200yr) AR(2) 0.20 45 SND24C2 1868 1999 CS(200yr) AR(3) 0.25 46 SND25A 1842 1999 CS(200yr) AR(2) 0.22 47 SND25B 1850 1999 CS(200yr) AR(3) 0.53 Fit Period = period of ring width used in curve fitting * = subset of full period of ring width in .rwl file Curve Fit = type of model used to detrend ring width NE=modified negative exponential SL=least-square-fit straight line HL=horizontal line at mean of ring width for fit period CS=cubic smoothing spline (wavelength of 50% frequency reponse in parentheses) Persistence = autoregressive prewhitening information AR(q) = order q of autoregressive model fit to core index nn = decimal proportion of core-index variance due to persistence; computed as 1-R, where R is the ratio of variance of residual index to variance of standard index References: Cook, E.R., Briffa, K., Shiyatov, S., Mazepa, V. 1990. Tree- ring standardization and growth-trend estimation. In: Methods of dendrochronology, applications in the environmental sciences. Kluwer Academic Press, Boston, 104-123. Cook, E.R., Peters, K., 1981. The smoothing spline: a new approach to standardizing forest interior tree-ring width series for dendroclimatic studies. Tree Ring Bulletin, 41, p. 45-53 Meko, D.M., M. D. Therrell, C. H. Baisan, and M. K. Hughes, 2001, Sacramento River Flow Reconstructed to A.D. 869 From Tree Rings, Journal of the American Water Resources Association, v.37, No.4, August 2001. Meko, D. M., 2001. Reconstructed Sacramento River system runoff from tree rings, Report prepared for the California Department of Water Resources under Agreement No. B81923-SAP # 4600000193. Available from: California Department of Water Resources, P.O. Box 942836, Room 1601, Sacramento, CA 94236-0001. 63 pp. COFECHA output: Chronology file name : CA632.CRN Measurement file name : CA632.RWL Date checked : 11MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1010 Ending year : 1999 Principal investigators: MEKO, BAISAN, GROW, TOUCHAN,FUNKHOUSER Site name : SARDINE POINT Site location : CALIFORNIA Species information : JUOC WESTERN JUNIPER Latitude : +3933 Longitude : -12012 Elevation : 2268M Series intercorrelation: 0.648 Avg mean sensitivity : 0.274 Avg standard deviation : 0.262 Avg autocorrelation : 0.706 Number dated series : 47 Segment length tested : 50 Number problem segments: 5 Pct problem segments : 0.83 PART 5: CORRELATION OF SERIES BY SEGMENTS: ca632.rwl 17:10 Fri 11 Mar 2005 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 1000 1025 1050 1075 1100 1125 1150 1175 1200 1225 1250 1275 1300 1325 1350 1375 1400 1425 1450 1475 1049 1074 1099 1124 1149 1174 1199 1224 1249 1274 1299 1324 1349 1374 1399 1424 1449 1474 1499 1524 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 5 SND03A 1482 1999 .72 7 SND04A 1492 1999 .57 8 SND04B 1481 1843 .55 21 SND11B1 1078 1771 .44 .43 .55 .54 .60 .65 .66 .71 .63 .51 .67 .75 .75 .65 .63 .76 .81 23 SND11C 1010 1525 .36 .34 .35 .69 .73 .69 .69 .68 .57 .58 .73 .68 .63 .61 .62 .62 .62 .51 .45 .56 24 SND12A 1324 1999 .58 .62 .69 .80 .70 .67 .81 .70 26 SND13A 1228 1999 .72 .84 .69 .52 .65 .74 .79 .76 .73 .77 .81 28 SND15A 1408 1773 .63 .49 .45 .60 30 SND16A 1494 1816 .60 39 SND21A 1462 1999 .78 .83 42 SND23C 1010 1702 .36 .34 .28B .36 .38 .42 .43 .59 .51 .45 .62 .65 .59 .57 .59 .65 .62 .52 .55 .44 Av segment correlation .36 .34 .32 .50 .51 .56 .55 .62 .57 .60 .73 .66 .56 .62 .68 .72 .66 .59 .65 .65 PART 5: CORRELATION OF SERIES BY SEGMENTS: ca632.rwl 17:10 Fri 11 Mar 2005 Page 6 ------------------------------------------------------------------------------------------------------------------------------------ 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 1500 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1549 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 SND01A 1721 1999 .33 .36 .45 .52 .64 .66 .59 .76 .80 .59 .67 2 SND01B 1692 1999 .46 .55 .51 .58 .55 .74 .81 .57 .69 .76 .68 .71 3 SND02A 1860 1999 .41 .41 .57 .56 .66 4 SND02B 1866 1999 .41 .64 .71 .53 .65 5 SND03A 1482 1999 .76 .80 .86 .88 .79 .78 .56 .39 .64 .70 .68 .65 .82 .85 .51 .61 .78 .63 .67 6 SND03B 1525 1998 .79 .80 .79 .80 .72 .55 .56 .73 .78 .74 .72 .80 .72 .44 .66 .76 .63 .66 7 SND04A 1492 1999 .58 .73 .69 .61 .68 .66 .53 .51 .60 .58 .61 .67 .68 .64 .59 .58 .56 .46 .50 8 SND04B 1481 1843 .62 .68 .59 .46 .57 .71 .64 .54 .46 .44 .51 .57 .53 9 SND05A 1789 1999 .80 .84 .84 .64 .80 .80 .63 .70 10 SND05B 1777 1999 .72 .78 .78 .69 .80 .77 .53 .61 11 SND07A 1800 1999 .72 .72 .62 .66 .60 .59 .67 12 SND07B 1800 1999 .50 .51 .52 .61 .66 .53 .36 13 SND08A 1798 1999 .68 .68 .62 .75 .36 .35 .65 .74 14 SND08B 1769 1998 .82 .84 .71 .68 .79 .85 .88 .86 .84 15 SND09A 1816 1999 .85 .85 .76 .84 .74 .59 .75 16 SND09B 1778 1999 .65 .91 .88 .81 .90 .87 .63 .60 17 SND09C 1771 1999 .57 .68 .85 .85 .83 .77 .71 .66 .77 18 SND10A 1642 1999 .65 .65 .56 .62 .58 .62 .73 .78 .71 .69 .86 .83 .61 .65 19 SND10B 1779 1998 .62 .74 .74 .55 .73 .76 .62 .60 20 SND11A 1719 1999 .61 .62 .60 .70 .74 .76 .77 .62 .60 .62 .62 21 SND11B1 1078 1771 .75 .67 .56 .47 .65 .81 .72 .61 .53 .47 22 SND11B2 1806 1999 .82 .66 .32B .53 .62 .40 .47 23 SND11C 1010 1525 .59 24 SND12A 1324 1999 .55 .64 .80 .70 .63 .78 .76 .77 .72 .61 .59 .74 .65 .56 .54 .60 .67 .65 .55 25 SND12B 1741 1999 .67 .61 .73 .62 .54 .71 .71 .56 .49 .55 26 SND13A 1228 1999 .77 .73 .86 .86 .81 .79 .76 .66 .70 .79 .79 .84 .90 .83 .71 .73 .72 .78 .86 27 SND13B 1764 1999 .79 .80 .88 .85 .70 .72 .73 .55 .57 28 SND15A 1408 1773 .60 .62 .74 .65 .49 .75 .66 .59 .73 .71 29 SND15B 1529 1999 .69 .62 .46 .49 .72 .64 .47 .55 .64 .71 .60 .43 .53 .71 .66 .70 .73 .57 30 SND16A 1494 1816 .56 .75 .67 .71 .80 .74 .73 .66 .61 .62 .50 .48 31 SND16B 1578 1999 .69 .78 .75 .68 .60 .68 .66 .68 .68 .74 .70 .58 .73 .75 .63 .46 32 SND17A 1646 1999 .81 .81 .69 .79 .75 .71 .83 .80 .69 .71 .77 .70 .54 .71 33 SND17B 1559 1999 .69 .69 .66 .82 .81 .70 .66 .69 .73 .74 .80 .74 .59 .60 .73 .66 .72 34 SND18A 1636 1999 .44 .45 .48 .57 .53 .60 .66 .60 .49 .36 .65 .70 .34 .51 35 SND18B 1712 1999 .58 .64 .64 .73 .79 .68 .44 .68 .63 .33A .60 36 SND19B 1586 1999 .41 .37B .58 .63 .46 .48 .58 .69 .74 .78 .58 .41 .69 .70 .52 .71 37 SND20A 1552 1999 .73 .74 .57 .64 .64 .49 .52 .65 .71 .59 .56 .51 .52 .41 .35 .47 .57 38 SND20B 1644 1999 .78 .79 .38 .50 .49 .35 .53 .54 .47 .37 .42 .59 .39 .35 39 SND21A 1462 1999 .82 .79 .83 .82 .80 .84 .83 .71 .75 .81 .72 .76 .70 .65 .75 .59 .49 .55 .63 40 SND21B1 1561 1694 .72 .67 .69 .77 .55 41 SND21B2 1690 1999 .54 .70 .76 .43 .42 .68 .68 .66 .61 .67 .67 .49 42 SND23C 1010 1702 .30A .43 .68 .68 .52 .52 .44 .44 43 SND24A 1696 1999 .59 .64 .68 .67 .58 .44 .47 .68 .63 .63 .73 .58 44 SND24B2 1887 1999 .60 .68 .79 .71 45 SND24C2 1868 1999 .64 .63 .66 .74 .70 46 SND25A 1842 1999 .78 .76 .66 .70 .79 .69 47 SND25B 1850 1999 .71 .57 .61 .75 .74 Av segment correlation .63 .69 .72 .66 .65 .72 .66 .56 .61 .63 .63 .67 .72 .69 .61 .66 .68 .60 .63 PART 7: DESCRIPTIVE STATISTICS: ca632.rwl 17:10 Fri 11 Mar 2005 Page 11 ------------------------------------------------------------------------------------------------------------------------------------ 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 SND01A 1721 1999 279 11 0 .605 .82 2.36 .449 .874 .228 2.44 .317 -.035 1 2 SND01B 1692 1999 308 12 0 .663 .89 2.25 .433 .846 .229 2.49 .308 -.014 1 3 SND02A 1860 1999 140 5 0 .578 .88 2.69 .441 .780 .232 2.52 .374 -.052 4 4 SND02B 1866 1999 134 5 0 .629 .92 2.81 .481 .881 .199 2.42 .231 -.046 4 5 SND03A 1482 1999 518 20 0 .720 .60 1.35 .217 .658 .240 2.55 .247 -.024 1 6 SND03B 1525 1998 474 18 0 .704 .50 1.28 .161 .556 .240 2.68 .319 -.025 1 7 SND04A 1492 1999 508 20 0 .601 .44 1.10 .203 .734 .293 2.51 .269 -.001 1 8 SND04B 1481 1843 363 14 0 .597 .47 2.19 .362 .896 .304 2.62 .340 .007 1 9 SND05A 1789 1999 211 8 0 .751 1.45 2.59 .313 .293 .189 2.67 .312 -.019 1 10 SND05B 1777 1999 223 8 0 .715 1.24 3.42 .532 .843 .194 2.42 .298 -.016 4 11 SND07A 1800 1999 200 7 0 .652 .63 1.38 .244 .530 .297 2.69 .450 -.016 1 12 SND07B 1800 1999 200 7 0 .502 .65 1.85 .320 .575 .351 2.99 .408 .033 1 13 SND08A 1798 1999 202 8 0 .582 1.02 1.57 .222 .325 .202 2.38 .255 -.033 1 14 SND08B 1769 1998 230 9 0 .830 .58 .89 .134 .445 .204 2.54 .264 -.035 4 15 SND09A 1816 1999 184 7 0 .798 .56 1.39 .227 .402 .357 2.91 .389 -.012 1 16 SND09B 1778 1999 222 8 0 .777 .63 1.58 .239 .464 .313 2.64 .363 -.065 2 17 SND09C 1771 1999 229 9 0 .763 .60 1.31 .242 .395 .353 2.64 .350 -.019 3 18 SND10A 1642 1999 358 14 0 .699 .69 1.52 .306 .778 .246 2.50 .300 -.044 1 19 SND10B 1779 1998 220 8 0 .671 .52 1.27 .261 .817 .231 2.54 .325 -.042 1 20 SND11A 1719 1999 281 11 0 .658 .92 2.45 .419 .800 .214 2.79 .392 -.025 1 21 SND11B1 1078 1771 694 27 0 .617 .31 1.12 .177 .713 .394 2.70 .382 .002 2 22 SND11B2 1806 1999 194 7 1 .581 .29 .74 .151 .529 .457 2.60 .428 .025 2 23 SND11C 1010 1525 516 21 0 .569 .33 1.34 .201 .756 .347 2.68 .371 .012 2 24 SND12A 1324 1999 676 27 0 .657 .45 1.10 .158 .482 .272 2.61 .322 .015 1 25 SND12B 1741 1999 259 10 0 .613 .66 1.59 .260 .640 .238 2.86 .443 .008 1 26 SND13A 1228 1999 772 30 0 .762 .34 .83 .122 .656 .248 2.63 .377 .008 1 27 SND13B 1764 1999 236 9 0 .748 .67 1.58 .229 .696 .214 2.59 .300 -.011 1 28 SND15A 1408 1773 366 14 0 .630 .53 1.34 .321 .891 .258 2.56 .367 .007 1 29 SND15B 1529 1999 471 18 0 .577 .49 1.17 .200 .779 .228 2.72 .364 .011 1 30 SND16A 1494 1816 323 13 0 .647 .34 1.44 .263 .880 .287 2.64 .306 .035 1 31 SND16B 1578 1999 422 16 0 .666 .26 .70 .092 .674 .225 2.67 .381 -.012 2 32 SND17A 1646 1999 354 14 0 .772 .71 1.86 .321 .821 .213 2.50 .269 -.003 1 33 SND17B 1559 1999 441 17 0 .720 .59 1.62 .354 .887 .246 2.39 .246 -.001 1 34 SND18A 1636 1999 364 14 0 .560 .57 2.57 .392 .805 .326 2.48 .329 -.011 1 35 SND18B 1712 1999 288 11 1 .631 .76 2.43 .544 .884 .283 2.46 .317 -.008 1 36 SND19B 1586 1999 414 16 1 .595 .77 2.06 .439 .898 .224 2.41 .332 -.028 3 37 SND20A 1552 1999 448 17 0 .576 .29 .91 .164 .712 .376 2.57 .374 -.027 4 38 SND20B 1644 1999 356 14 0 .501 .48 1.09 .203 .667 .330 2.58 .368 -.026 4 39 SND21A 1462 1999 538 21 0 .730 .75 2.39 .442 .823 .260 2.79 .393 .007 1 40 SND21B1 1561 1694 134 5 0 .655 .76 2.35 .403 .800 .263 2.57 .390 -.002 1 41 SND21B2 1690 1999 310 12 0 .579 .39 .87 .182 .734 .290 2.88 .407 .021 2 42 SND23C 1010 1702 693 28 2 .488 .48 1.29 .217 .770 .240 2.69 .349 .024 2 43 SND24A 1696 1999 304 12 0 .593 .32 1.14 .170 .631 .381 2.84 .500 .009 1 44 SND24B2 1887 1999 113 4 0 .681 .22 .47 .087 .386 .380 2.59 .509 -.004 1 45 SND24C2 1868 1999 132 5 0 .655 .25 .56 .119 .527 .360 2.78 .427 .008 1 46 SND25A 1842 1999 158 6 0 .714 1.07 2.02 .254 .624 .156 2.87 .482 -.029 1 47 SND25B 1850 1999 150 5 0 .675 1.04 2.22 .341 .772 .155 2.75 .449 -.002 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 15610 602 5 .648 .57 3.42 .262 .706 .274 2.99 .348 -.006