Lookout Mountain Lower, Oregon - OR046 Additional Site Information James H. Speer and Thomas W. Swetnam Purpose of Collection: Ecology - insect outbreaks Detrend method: 40-year cubic smoothing spline Cores are stored at Laboratory of Tree-Ring Research, Tucson, AZ. This site was collected for a pandora moth outbreak study. We were able to demonstrate that much of the variance in the tree cores was explained by the effects of pandora moth defoliation, therefore, this chronology would not be useful for climate reconstruction. We used a 40-year cubic smoothing spline on the cores to remove long-term climate fluctuations and age trends. References: Speer, J.H. 1997. A dendrochronological record of pandora moth (Coloradia pandora, Blake) outbreaks in central Oregon. MS thesis, The Univeristy of Arizona. Tucson, 159pp. Speer, J.H., Swetnam, T.W., Wickman, B.E., and Youngblood, A., 2000. Changes in pandora moth outbreak dynamics during the past 622 years. Submitted to Ecology. COFECHA output: Chronology file name : OR046.CRN Measurement file name : OR046.RWL Date checked : 29MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1529 Ending year : 1995 Principal investigators: James H. Speer and Thomas W. Swetnam Site name : Lookout Mountain Lower Site location : Oregon Species information : PIPO PONDEROSA PINE Latitude : +4345 Longitude : -12139 Elevation : 1320M Series intercorrelation: 0.495 Avg mean sensitivity : 0.201 Avg standard deviation : 0.650 Avg autocorrelation : 0.882 Number dated series : 19 Segment length tested : 50 Number problem segments: 41 Pct problem segments : 15.89 PART 5: CORRELATION OF SERIES BY SEGMENTS: or046.rwl 13:11 Tue 29 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 1525 1550 1575 1600 1625 1650 1675 1700 1725 1750 1775 1800 1825 1850 1875 1900 1925 1950 1574 1599 1624 1649 1674 1699 1724 1749 1774 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 LML01B 1675 1995 .55 .34 .24B .21B .52 .61 .53 .47B .48 .33B .36 .34 2 LML02A 1835 1995 .56 .53 .59 .38 .35 .30A 3 LML02B 1822 1995 .49 .53 .36 .41 .39 .48 .38 4 LML03A 1650 1993 .67 .73 .67 .64 .46 .51 .52 .53 .42 .16B .16B .28A .17B 5 LML03B 1694 1995 .58 .56 .56 .51 .62 .62 .62 .47 .37 .27A .21B .16B 6 LML04A 1712 1995 .31A .30A .39 .69 .73 .48 .44 .39B .38B .39 .45 7 LML04B 1690 1995 .28A .28A .52 .56 .63 .61 .50 .49 .48 .51 .38 .27A 8 LML05A 1529 1995 .14B .38 .53 .58 .69 .74 .56 .42 .51 .61 .60 .62 .70 .55 .41 .40B .30B .20B 9 LML05B 1615 1995 .72 .65 .65 .35B .46 .56 .51 .71 .57 .40 .53 .47 .31A .39 .60 10 LML06A 1581 1995 .39 .57 .71 .65 .53 .52 .49 .51 .43B .42 .46 .59 .52 .21B .38 .65 11 LML06B 1576 1995 .30A .55 .65 .54 .44 .51 .52 .51 .53 .60 .53 .73 .63 .34 .38 .46 12 LML07A 1637 1995 .56 .61 .57 .63 .66 .53 .63 .76 .70 .74 .77 .59 .36B .29A 13 LML07B 1629 1995 .51 .70 .62 .63 .70 .58 .68 .74 .67 .71 .72 .62 .40 .50 14 LML08A 1532 1995 .26B .42 .63 .67 .83 .84 .63 .58 .61 .59 .54 .61 .61 .60 .56 .47 .29A .54 15 LML08B 1592 1995 .56 .62 .84 .76 .60 .48 .48 .51 .48 .54 .43B .26B .32B .43 .15B .48 16 LML09A 1703 1995 .36 .52 .59 .47 .57 .64 .47 .51 .54 .32B .48 17 LML09B 1721 1995 .25B .30B .38 .44 .55 .73 .51 .42 .39 .30B .39 18 LML10A 1534 1995 .38 .39 .46 .50 .70 .80 .52 .49 .53 .41 .55 .60 .42 .55 .59 .41B .34 .45 19 LML10B 1544 1995 .45 .47 .60 .67 .71 .77 .55 .61 .64 .54 .56 .58 .49 .47 .47 .40 .39 .48 Av segment correlation .31 .41 .50 .61 .69 .70 .54 .48 .51 .49 .56 .60 .55 .52 .49 .40 .34 .40 PART 7: DESCRIPTIVE STATISTICS: or046.rwl 13:11 Tue 29 Mar 2005 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 LML01B 1675 1995 321 12 4 .434 1.24 3.45 .732 .896 .215 2.56 .357 -.032 1 2 LML02A 1835 1995 161 6 1 .469 2.16 3.89 .709 .816 .158 2.55 .414 -.001 1 3 LML02B 1822 1995 174 7 0 .438 1.92 4.42 .713 .780 .206 2.64 .405 .021 1 4 LML03A 1650 1993 344 13 4 .453 .95 3.44 .702 .935 .184 2.59 .365 -.019 1 5 LML03B 1694 1995 302 12 3 .441 1.01 3.61 .630 .915 .179 2.65 .454 -.044 1 6 LML04A 1712 1995 284 11 4 .441 1.22 2.93 .599 .848 .199 2.43 .313 -.022 1 7 LML04B 1690 1995 306 12 3 .443 1.25 2.66 .595 .856 .196 2.60 .379 -.030 1 8 LML05A 1529 1995 467 18 4 .465 1.14 3.11 .606 .863 .201 2.53 .284 -.016 2 9 LML05B 1615 1995 381 15 2 .527 1.05 4.69 .986 .950 .177 2.52 .364 -.011 2 10 LML06A 1581 1995 415 16 2 .497 .97 3.32 .655 .910 .197 2.59 .351 -.052 1 11 LML06B 1576 1995 420 16 1 .490 1.01 3.04 .669 .907 .215 2.44 .296 .005 9 12 LML07A 1637 1995 359 14 2 .572 1.00 4.12 .898 .960 .172 2.73 .347 .017 1 13 LML07B 1629 1995 367 14 0 .611 1.20 3.95 .994 .949 .185 2.57 .326 -.032 1 14 LML08A 1532 1995 464 18 2 .557 .89 2.28 .403 .830 .230 2.54 .316 -.005 2 15 LML08B 1592 1995 404 16 4 .490 1.06 2.51 .442 .827 .215 2.41 .269 -.019 1 16 LML09A 1703 1995 293 11 1 .481 1.25 3.08 .549 .803 .220 2.33 .257 -.003 1 17 LML09B 1721 1995 275 11 3 .440 1.33 2.95 .546 .747 .234 2.72 .424 -.039 3 18 LML10A 1534 1995 462 18 1 .494 .83 2.32 .432 .887 .205 2.60 .320 -.032 1 19 LML10B 1544 1995 452 18 0 .546 .93 3.25 .643 .932 .205 2.55 .390 -.012 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 6651 258 41 .495 1.11 4.69 .650 .882 .201 2.73 .342 -.018