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- W1527367029 abstract "ABSTRACT Preliminary results are presented of studies using oxygen isotopes and tree-ring densitometry to derive proxy climatic data from Picea engelmannii and Abies Iasiocarpa in the Canadian Rockies. Significant correlations occur between mean annual temperatures and δ 18 O determinations from five year groups of tree rings from three trees. However, unexplained anomalies in these relationships indicate that ring-width effects may reduce this correlation in some cases and that further exploratory work is necessary. Indexed chronologies for the period 1705-1980 were developed for 15 tree-ring variables derived by X-ray densitometry from 16 Picea cores. Principal components analysis was used to identify three groups of highly inter-correlated variables related to ring width, earlywood density and latewood characteristics. Each group responds differently to climatic controls increasing the potential for development of proxy climatic data over ring-width measures alone. Transfer function development is incomplete but preliminary results for summer temperature (June and July, R 2 = 0,46) and December-March precipitation (R 2 = 0,40) are presented as examples. Using these equations preliminary reconstructions for the period 1710-1980 are presented." @default.
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- W1527367029 date "2007-12-04" @default.
- W1527367029 modified "2023-10-13" @default.
- W1527367029 title "Proxy Climatic Data from Tree Rings at Lake Louise, Alberta : A Preliminary Report" @default.
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- W1527367029 doi "https://doi.org/10.7202/032597ar" @default.
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