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Climatic responses of tree-ring widths of <Emphasis Type="Italic">Larix gmelinii</Emphasis> on contrasting north-facing and south-facing slopes in central Siberia
Authors:Joni Kujansuu  Koh Yasue  Takayoshi Koike  Anatoly P Abaimov  Takuya Kajimoto  Takashi Takeda  Morihiko Tokumoto  Yojiro Matsuura
Institution:(1) United Graduate School of Agricultural Science, Gifu University, Gifu 501-1193, Japan;(2) Department of Forest Science, Faculty of Agriculture, Shinshu University, Minami-Minowa, Nagano 399-4598, Japan;(3) Faculty of Agriculture, Hokkaido University, Sapporo 060-0811, Japan;(4) Sukachev Institute of Forest, Siberian Branch, Russian Academy of Science, Academgorodok, Krasnoyarsk, 660036, Russia;(5) Kyushu Research Center, Forestry and Forest Products Research Institute, Kumamoto 860-0862, Japan;(6) Forestry and Forest Products Research Institute, Tsukuba 305-8687, Japan
Abstract:An analysis was performed on the climatic responses of the radial growth of Larix gmelinii (Rupr.) Rupr. on contrasting north-facing and south-facing slopes in Tura, central Siberia. We developed chronologies of tree-ring width for four plots, designated as north-upper, northlower, south-upper, and south-lower. Both residual and standard chronologies of tree-ring widths exhibited a significant positive correlation with temperature from the end of May until early June in all four plots. The chronologies of ring width did not reveal any major difference in the response to temperature among the four plots. The standard chronologies of ring widths on the north-facing slope were negatively correlated with precipitation during the winter (October–April) and in early and mid-May, whereas the residual chronologies did not reveal clear relationships with precipitation during the winter and May. The significant correlation between ring width and temperature from the end of May until early June indicates that temperatures in springtime play a significant role in the radial growth of L. gmelinii. The negative correlations between standard chronologies of tree-ring width and precipitation in the winter and in May on the north-facing slope indicate that lowfrequency fluctuations in snowfall have negative effects on the radial growth. However, these effects vary and depend on the microscale topography. Part of this report was presented at the 55th Annual Meeting of the Japan Wood Society, March 2005, Kyoto
Keywords:Larix gmelinii            Siberia  Permafrost  Climatic response  Tree-ring width
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