Relationship between Climate and Radial Growth of Pinus parviflora var. pentaphylla on Mountain Ridges under Thick Snow in Tohoku, Japan(<Special Issue>Multipurpose Forest Management)

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In this study, Pinus parviflora var. pentaphylla trees from four ridges (sites) on Mount Gassan in Yamagata Prefecture were sampled for tree-ring analysis. Two cores were collected from each of the 32 individuals sampled. After confirming the synchronization of tree-ring-width fluctuations within each site and among sites, correlation coefficients were calculated between tree-ring-width fluctuations and monthly climate data for precipitation, snowfall, daylight duration, and average temperature. t-values of the synchronization of tree-ring width among sites were higher than 3.46, indicating a significant correlation at the 0.1% level. Synchrony was not significantly different among sites. The range of synchronization was estimated to be within a radius of 14 km. The correlation coefficients between the tree-ring-width index and meteorological data for the previous year in December, January snowfall, and April temperature were significant at the 1% level. Our results suggest that P. parviflora var. pentaphylla trees from mountain ridges provide reliable information on past climate events and are thus suitable for assessing dendroclimatology.
森林計画学会の論文