Bakehouse Lane, Waterford, Ireland - brit047 Additional descriptive information D.M. Brown Purpose of Collection: Archaeology - construction (felling dates) Reference: Brown, D. M. 1997. Dendrochronological Dating of Hiberno-Norse Medieval Structures from Waterford. In T. Barry, R. Cleary and M. F. Hurley (eds.) Late Viking Age and Medieval Waterford Excavations 1986 - 1992 by M. F. Hurley, O. M. B. Scully and S. W. J. McCutcheon. Waterford Corporation. 643-649. Detrend method: Linear regression of any slope Samples stored and available to be examined at Palaeoecology Centre, Queen's University of Belfast, 42 Fitzwilliam Street, Belfast BT9 6AX, Northern Ireland. COFECHA output: Brit047.cof.txt - Bakehouse Lane, Waterford [] DENDROCHRONOLOGY PROGRAM LIBRARY Run BAKE Program COF 09:53 Mon 29 NOV 1999 Page 1 [] [] P R O G R A M C O F E C H A Version 3.00P 23710 ------------------------------------------------------------------------- ---------------------------------------------------------- QUALITY CONTROL AND DATING CHECK OF TREE-RING MEASUREMENTS Title of run: Bakehouse Lane, Waterford File of DATED series: A:BAKE.TUC CONTENTS: Part 1: Title page, options selected, summary, absent rings by series Part 2: Histogram of time spans Part 3: Master series with sample depth and absent rings by year Part 4: Bar plot of Master Dating Series Part 5: Correlation by segment of each series with Master Part 6: Potential problems: low correlation, divergent year-to-year changes, absent rings, outliers Part 7: Descriptive statistics RUN CONTROL OPTIONS SELECTED VALUE 1 Cubic smoothing spline 50 avelength cutoff for filtering 32 years 2 Segments examined are 50 years lagged successively by 25 years 3 Autoregressive model applied A Residuals are used in master dating series and testing 4 Series transformed to logarithms Y Each series log-transformed for master dating series and testing 5 Critical correlation, 99 onfidence level .3281 6 Master dating series saved N 7 Ring measurements listed N 8 Parts printed 1234567 9 Absent rings included in master series N Time span of Master dating series is 901 to 1127 227 years Continuous time span is 901 to 1127 227 years Portion with two or more series is 938 to 1100 163 years **************************************** *C* Number of dated series 7 *C* *O* Master series 901 1127 227 yrs *O* *F* Total rings in all series 865 *F* *E* Total dated rings checked 801 *E* *C* Series intercorrelation .492 *C* *H* Average mean sensitivity .269 *H* *A* Segments, possible problems 4 *A* **************************************** ABSENT RINGS listed by SERIES: (See Master Dating Series for absent rings listed by year) No ring measurements of zero value PART 2: TIME PLOT OF TREE-RING SERIES: Bakehouse Lane, Waterford 09:53 Mon 29 NOV 1999 Page 2 ------------------------------------------------------------------------- ---------------------------------------------------------- 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Beg End Ident Seq year year Yrs : : : : : : : : : : : : : : : : : : : : : -------- --- ---- ---- ---- =========> . . . . . . . . . . . . . . . . . . . Q 7483 1 938 1075 138 ==============> . . . . . . . . . . . . . . . . . . Q 7631 2 978 1127 150 ============> . . . . . . . . . . . . . . . . . . Q 7632 3 901 1100 200 =========> . . . . . . . . . . . . . . . . . . . Q 7634 4 957 1073 117 <======> . . . . . . . . . . . . . . . . . . . Q 7635 5 996 1067 72 =======> . . . . . . . . . . . . . . . . . . . Q 8269 6 972 1055 84 =======> . . . . . . . . . . . . . . . . . . . Q8270M 7 950 1053 104 : : : : : : : : : : : : : : : : : : : : : 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 PART 3: Master Dating Series: Bakehouse Lane, Waterford 09:53 Mon 29 PART 5: CORRELATION OF SERIES BY SEGMENTS: Bakehouse Lane, Waterford 09:53 Mon 29 NOV 1999 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 925 950 975 1000 1025 1050 1075 974 999 1024 1049 1074 1099 1124 --- -------- --------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1 Q 7483 938 1075 .42 .51 .68 .61 .43 .42 2 Q 7631 978 1127 .70 .68 .58 .29A .26A 3 Q 7632 901 1100 .46 .49 .38 .49 .55 .27A .24A 4 Q 7634 957 1073 .46 .49 .47 .44 5 Q 7635 996 1067 .60 .59 .57 6 Q 8269 972 1055 .61 .63 .74 .69 7 Q8270M 950 1053 .51 .61 .70 .64 PART 6: POTENTIAL PROBLEMS: Bakehouse Lane, Waterford 09:53 Mon 29 NOV 1999 Page 6 ------------------------------------------------------------------------- ---------------------------------------------------------- For each series with potential problems the following diagnostics may appear: [A] Correlations with master dating series of flagged 50-year segments of series filtered with 32-year spline, at every point from ten years earlier (-10) to ten years later ( 10) than dated [B] Effect of those data values which most lower or raise correlation with master series [C] Year-to-year changes very different from the mean change in other series [D] Absent rings (zero values) [E] Values which are statistical outliers from mean for the year ========================================================================= ========================================================== Q 7483 938 to 1075 138 years Series 1 [B] Entire series, effect on correlation ( .471) is: Lower 951 -.022 954 -.016 1032 -.014 942 -.013 Higher 1039 .021 1016 .017 985 .012 946 .010 [E] Outliers 10 3.0 SD above or -4.5 SD below mean for year 942 3.1 SD; 943 3.0 SD; 944 3.0 SD; 951 -4.7 SD; 954 4.2 SD; 974 3.2 SD; 1021 3.1 SD; 1032 3.4 SD; 1055 3.7 SD; 1068 4.6 SD ========================================================================= ========================================================== Q 7631 978 to 1127 150 years Series 2 [*] Later part of series cannot be checked from 1101 to 1127 -- not matched by another series [A] Segment High -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 --------- ---- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 1050 1099 0 .22 .06 .02 -.30 .04 -.02 -.22 .14 .10 .14 .29* .00 -.10 -.09 -.26 -.12 .01 -.15 .10 .17 .01 1051 1100 0 .16 .01 .00 -.23 .06 .01 -.23 .18 .08 .15 .26*-.04 -.09 -.10 -.30 -.11 .03 -.12 .09 .18 -.01 [B] Entire series, effect on correlation ( .485) is: Lower 1081 -.063 1093 -.019 1100 -.016 1078 -.016 Higher 1091 .019 1061 .015 1054 .013 1024 .010 1050 to 1099 segment: Lower 1081 -.121 1078 -.033 1093 -.031 1071 -.026 Higher 1091 .061 1061 .052 1054 .043 1090 .029 1051 to 1100 segment: Lower 1081 -.110 1100 -.032 1093 -.031 1078 -.030 Higher 1091 .063 1061 .052 1054 .044 1090 .031 [E] Outliers 6 3.0 SD above or -4.5 SD below mean for year 1049 3.0 SD; 1078 3.8 SD; 1081 6.1 SD; 1093 -4.6 SD; 1098 3.2 SD; 1100 4.4 SD ========================================================================= ========================================================== Q 7632 901 to 1100 200 years Series 3 [*] Early part of series cannot be checked from 901 to 937 -- not matched by another series [A] Segment High -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 --------- ---- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 1050 1099 0 -.25 .00 .07 -.17 -.06 .00 -.25 -.07 -.09 .09 .27* .14 .14 .08 -.29 .03 .03 -.23 .00 .17 .12 1051 1100 0 -.21 .04 .09 -.16 -.06 .00 -.25 -.08 -.10 .08 .24* .15 .14 .09 -.27 .02 .03 -.24 .01 .16 .13 [B] Entire series, effect on correlation ( .399) is: Lower 1081 -.030 1071 -.020 958 -.017 1100 -.012 Higher 1039 .022 973 .016 946 .015 1061 .012 1050 to 1099 segment: Lower 1081 -.089 1071 -.056 1078 -.034 1093 -.030 Higher 1091 .055 1061 .049 1090 .031 1057 .024 1051 to 1100 segment: Lower 1081 -.080 1071 -.048 1100 -.031 1093 -.030 Higher 1091 .057 1061 .049 1090 .032 1065 .027 [E] Outliers 8 3.0 SD above or -4.5 SD below mean for year 971 3.3 SD; 986 3.0 SD; 989 3.0 SD; 1049 3.2 SD; 1071 -5.0 SD; 1077 3.7 SD; 1081 -6.1 SD; 1093 4.6 SD ========================================================================= ========================================================== Q 7634 957 to 1073 117 years Series 4 [B] Entire series, effect on correlation ( .414) is: Lower 958 -.029 1073 -.019 1020 -.015 1054 -.014 Higher 1061 .017 988 .017 1024 .016 1039 .015 [E] Outliers 8 3.0 SD above or -4.5 SD below mean for year 958 4.4 SD; 967 3.3 SD; 973 -4.5 SD; 985 3.3 SD; 1011 3.6 SD; 1020 3.6 SD; 1029 3.6 SD; 1054 3.1 SD ========================================================================= ========================================================== Q 7635 996 to 1067 72 years Series 5 [B] Entire series, effect on correlation ( .570) is: Lower 1034 -.030 1065 -.029 1001 -.027 1000 -.026 Higher 1016 .051 1061 .027 1026 .013 1029 .013 ========================================================================= ========================================================== Q 8269 972 to 1055 84 years Series 6 [B] Entire series, effect on correlation ( .646) is: Lower 985 -.018 999 -.018 1054 -.009 1051 -.008 Higher 1016 .030 1039 .016 1042 .011 1026 .009 ========================================================================= ========================================================== Q8270M 950 to 1053 104 years Series 7 [B] Entire series, effect on correlation ( .586) is: Lower 954 -.035 951 -.018 1029 -.014 1053 -.012 Higher 1039 .019 1016 .016 1047 .011 988 .010 [E] Outliers 1 3.0 SD above or -4.5 SD below mean for year 954 -5.0 SD ========================================================================= ========================================================== PART 7: DESCRIPTIVE STATISTICS: Bakehouse Lane, Waterford 09:53 Mon 29 NOV 1999 Page 7 ------------------------------------------------------------------------- ---------------------------------------------------------- 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 Q 7483 938 1075 138 6 0 .471 .41 1.25 .170 .552 .303 2.13 .490 .005 2 2 Q 7631 978 1127 150 5 2 .485 .62 1.50 .275 .640 .290 1.99 .375 .043 1 3 Q 7632 901 1100 200 7 2 .399 .29 .63 .101 .509 .264 2.12 .395 .037 1 4 Q 7634 957 1073 117 4 0 .414 .60 1.78 .364 .804 .279 1.91 .293 .001 1 5 Q 7635 996 1067 72 3 0 .570 .84 1.54 .343 .765 .231 2.04 .330 -.012 1 6 Q 8269 972 1055 84 4 0 .646 .65 1.12 .182 .186 .279 1.92 .350 -.041 2 7 Q8270M 950 1053 104 4 0 .586 .62 2.11 .333 .866 .210 2.03 .355 -.051 2 --- -------- --------- ----- ----- ----- ------ ----- ----- ----- ----- ----- ----- ----- ----- -- Total or mean: 865 33 4 .492 .53 2.11 .234 .611 .269 2.13 .378 .006 - = [ COFECHA BAKE COF ]