Little Barrier Island, New Zealand - newz086 Additional information Moinuddin Ahmed Purpose of Collection: Climatology Detrend method: ARSTAN: Smoothing spline with 200 cutoff Cores are stored at: Tree-Ring Lab School of Geography, Geology and Environmental Science The University of Auckland 10 Symonds Street Auckland, New Zealand Cores available to view at the lab. References: Cores collected for ecology and climatology research from high altitude (>500m) and low altitude sites (<500m) on Little Barrier Island. Data here is from the low sites. See: Ahmed, M. and Ogden, J. 1985. Modern New Zealand Tree-ring Chronologies III: Agathis australis (Salisb.) - kauri. Tree-ring Bulletin 45: 11-45 Reviewed by: Fowler, A., Boswijk, G. and Ogden, J. 2004. Tree-Ring Studies on Agathis australis (kauri): A Synthesis of Development Work on Late Holocene Chronologies. Tree-Ring Research 60(1): 15-29 For further details see: Fowler, A.M., Boswijk, G., Gergis, J. and Lorrey, A. 2008. ENSO history recorded in Agathis australis (kauri) tree rings: Part A: kauri's potential as an ENSO proxy. International Journal of Climatology 28: 1-20 COFECHA output: Chronology file name : NEWZ086.CRN Measurement file name : NEWZ086.RWL Date checked : 20FEB09 Checked by : B. Bauer Beginning year : 1790 Ending year : 1981 Principal investigators: Moinuddin Ahmed Site name : Little Barrier Island Site location : New Zealand Species information : AGAU KAURI PINE Latitude : -3612 Longitude : 17508 Elevation : 274M Series intercorrelation: 0.595 Avg mean sensitivity : 0.359 Avg standard deviation : 0.891 Avg autocorrelation : 0.670 Number dated series : 19 Segment length tested : 50 Number problem segments: 2 Pct problem segments : 1.74 PART 5: CORRELATION OF SERIES BY SEGMENTS: Little Barrier Island 14:51 Fri 20 Feb 2009 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 1775 1800 1825 1850 1875 1900 1925 1950 1824 1849 1874 1899 1924 1949 1974 1999 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 LTB0051 1810 1981 .63 .54 .58 .68 .62 .48 .44 2 LTB0052 1800 1981 .37 .54 .59 .61 .58 .70 .66 3 LTB0071 1850 1981 .50 .59 .67 .66 .64 4 LTB0072 1840 1981 .46 .53 .52 .63 .60 .67 5 LTB0151 1830 1981 .61 .56 .60 .56 .61 .59 6 LTB0152 1820 1981 .31A .29A .49 .73 .67 .70 .65 7 LTB0161 1790 1981 .50 .43 .44 .63 .68 .67 .62 .64 8 LTB0171 1800 1981 .42 .50 .57 .68 .65 .44 .44 9 LTB0172 1800 1981 .45 .41 .74 .76 .71 .78 .79 10 LTB0181 1790 1981 .37 .43 .63 .58 .59 .57 .67 .70 11 LTB0191 1830 1981 .61 .65 .67 .60 .66 .71 12 LTB0192 1860 1981 .77 .75 .72 .54 .56 13 LTB0301 1925 1981 .41 .49 14 LTB0302 1875 1981 .58 .67 .65 .71 15 LTB0322 1890 1981 .71 .62 .51 .49 16 LTB0331 1820 1981 .77 .80 .79 .72 .67 .73 .74 17 LTB0332 1790 1981 .56 .56 .72 .79 .79 .70 .60 .64 18 LTB0351 1840 1981 .36 .36 .70 .70 .62 .67 19 LTB0352 1870 1981 .59 .60 .74 .79 .77 Av segment correlation .48 .49 .53 .61 .66 .65 .62 .63 PART 7: DESCRIPTIVE STATISTICS: Little Barrier Island 14:51 Fri 20 Feb 2009 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 LTB0051 1810 1981 172 7 0 .568 1.55 4.21 .744 .600 .381 2.77 .405 -.032 1 2 LTB0052 1800 1981 182 7 0 .551 1.32 3.64 .581 .473 .378 2.77 .523 -.061 1 3 LTB0071 1850 1981 132 5 0 .570 1.46 4.94 1.072 .775 .459 2.61 .434 -.044 3 4 LTB0072 1840 1981 142 6 0 .542 1.67 5.62 1.022 .736 .416 2.61 .380 -.040 3 5 LTB0151 1830 1981 152 6 0 .575 2.04 5.15 1.047 .774 .305 2.81 .487 -.106 1 6 LTB0152 1820 1981 162 7 2 .580 1.83 3.83 .786 .737 .269 2.63 .424 -.071 1 7 LTB0161 1790 1981 192 8 0 .598 1.50 3.91 .758 .668 .346 2.63 .388 -.016 5 8 LTB0171 1800 1981 182 7 0 .516 1.61 4.26 .785 .538 .364 2.81 .449 -.060 1 9 LTB0172 1800 1981 182 7 0 .657 1.59 4.41 .873 .709 .384 2.73 .431 -.058 4 10 LTB0181 1790 1981 192 8 0 .546 2.58 5.65 1.009 .797 .222 2.52 .323 -.020 1 11 LTB0191 1830 1981 152 6 0 .627 1.93 3.79 .776 .654 .316 2.51 .352 -.028 1 12 LTB0192 1860 1981 122 5 0 .660 1.86 4.69 1.028 .736 .369 2.67 .391 -.081 2 13 LTB0301 1925 1981 57 2 0 .437 2.85 5.60 1.125 .518 .360 2.59 .551 -.039 1 14 LTB0302 1875 1981 107 4 0 .624 2.01 5.62 1.142 .674 .382 2.90 .521 -.073 1 15 LTB0322 1890 1981 92 4 0 .566 1.46 3.72 .620 .677 .289 2.78 .599 -.089 1 16 LTB0331 1820 1981 162 7 0 .717 1.64 5.02 .907 .638 .439 2.53 .414 -.063 1 17 LTB0332 1790 1981 192 8 0 .674 1.53 5.68 1.005 .678 .473 2.54 .370 -.042 2 18 LTB0351 1840 1981 142 6 0 .535 2.10 6.11 1.071 .704 .348 2.64 .414 .011 6 19 LTB0352 1870 1981 112 5 0 .675 2.20 4.33 .843 .598 .298 2.64 .481 -.040 1 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 2828 115 2 .595 1.78 6.11 .891 .670 .359 2.90 .428 -.049