Abstract
Abstract Correlations between tree-ring width and monthly mean temperature, rainfall, and moisture surplus were investigated in two areas of contrasting rainfall. Species considered were: Podocarpus hallii, Phyllocladus alpinus, Discaria toumatou, and Pinus nigra from Lake Tekapo (annual rainfall range 57-104 cm); and Nothofagus solandri, Phyllocladus alpinus, and Pinus contorta from Mt Ruapehu (annual rainfall range 180-290 cm). The gross morphology of the growth rings is briefly described. Ring indices were derived by adjusting ring width measurements for the mean growth of the trees. Only 9 to 37 percent of the total variation in these ring indices could be attributed to differences in climate or other factors in the different years. Most species showed significant positive correlations between ring indices of successive years. Average ring sequences are given for each species and sequences suitable for cross-dating indicated. At Mt Ruapehu the ring indices were principally correlated with temperature,...
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