Surveyor Flow, Oregon - OR050 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 : OR050.CRN Measurement file name : OR050.RWL Date checked : 29MAR05 Checked by : H. ADAMS AND J. LUKAS Beginning year : 1747 Ending year : 1995 Principal investigators: James H. Speer and Thomas W. Swetnam Site name : Surveyor Flow Site location : Oregon Species information : PIPO PONDEROSA PINE Latitude : +4337 Longitude : -12118 Elevation : 1550M Series intercorrelation: 0.539 Avg mean sensitivity : 0.217 Avg standard deviation : 0.858 Avg autocorrelation : 0.828 Number dated series : 10 Segment length tested : 50 Number problem segments: 4 Pct problem segments : 5.41 PART 5: CORRELATION OF SERIES BY SEGMENTS: or050.rwl 13:12 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 1750 1775 1800 1825 1850 1875 1900 1925 1950 1799 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 SVF01A 1805 1995 .43 .64 .65 .32B .36 .50 .42 2 SVF01B 1747 1995 .45 .46 .70 .73 .75 .64 .61 .62 .53 3 SVF02A 1863 1995 .63 .41 .37 .53 .57 4 SVF02B 1790 1995 .24A .53 .62 .54 .41 .39 .45 .45 5 SVF03A 1812 1995 .69 .69 .68 .51 .56 .64 .56 6 SVF03B 1788 1995 .50 .45 .48 .71 .45 .51 .62 .56 7 SVF04A 1808 1995 .61 .59 .61 .59 .67 .60 .59 8 SVF04B 1766 1995 .46 .55 .70 .79 .75 .56 .54 .65 .63 9 SVF05A 1809 1995 .55 .68 .58 .46 .37 .42 .55 10 SVF05B 1800 1995 .35 .48 .52 .35B .22B .37 .52 Av segment correlation .46 .44 .56 .63 .64 .47 .46 .54 .54 PART 7: DESCRIPTIVE STATISTICS: or050.rwl 13:12 Tue 29 Mar 2005 Page 6 ------------------------------------------------------------------------------------------------------------------------------------ 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 SVF01A 1805 1995 191 7 1 .456 1.53 4.11 .665 .829 .188 2.53 .358 .000 1 2 SVF01B 1747 1995 249 9 0 .596 1.53 3.62 .687 .859 .178 2.52 .402 -.017 2 3 SVF02A 1863 1995 133 5 0 .539 2.44 5.11 .888 .799 .211 2.81 .489 .030 1 4 SVF02B 1790 1995 206 8 1 .484 1.46 4.85 .691 .803 .260 2.51 .281 -.030 1 5 SVF03A 1812 1995 184 7 0 .611 2.00 4.85 .996 .795 .245 2.42 .239 -.061 1 6 SVF03B 1788 1995 208 8 0 .505 1.83 3.85 .753 .759 .231 2.56 .352 .011 1 7 SVF04A 1808 1995 188 7 0 .616 1.57 4.13 .697 .777 .240 2.64 .390 -.045 1 8 SVF04B 1766 1995 230 9 0 .625 1.80 4.41 .822 .812 .222 2.53 .355 -.042 1 9 SVF05A 1809 1995 187 7 0 .545 1.50 5.85 1.170 .931 .189 2.57 .441 .059 2 10 SVF05B 1800 1995 196 7 2 .402 1.83 5.95 1.301 .906 .211 2.75 .496 .016 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 1972 74 4 .539 1.72 5.95 .858 .828 .217 2.81 .377 -.010