Climatic responses of tree-ring widths of Larix gmelinii on contrasting north-facing and south-facing slopes in central Siberia
Climatic responses of tree-ring widths of Larix gmelinii on contrasting north-facing and south-facing slopes in central Siberia
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DOI：
10.1007/s10086-006-0837-9
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发表时间：
2007-04-01
影响因子：
2.9
通讯作者：
Matsuura, Yojiro
中科院分区：
文献类型：
--
作者：
Kujansuu, Joni;Yasue, Koh;Matsuura, Yojiro
对落叶松（Larix gmelinii）径向生长的气候响应进行了分析。Rupr。在西伯利亚中部图拉的朝北和朝南的斜坡上。我们开发了四个样地的年轮宽度年表，分别为北上、北下、南上和南下。在5月底至6月初，4个样地树木年轮宽度的残差年表和标准年表均与温度呈显著正相关。环宽年代表显示，4个样地对温度的响应没有明显差异。北坡环宽度的标准年表与冬季（10 - 4月）和5月上中旬的降水呈负相关，而剩余年表与冬季和5月的降水关系不明显。5月底至6月初，环宽与温度呈显著相关，说明春季温度对羊草径向生长有显著影响。冬季和5月北坡树木年轮宽度与降水的标准年表负相关表明，降雪的低频波动对径向生长有负面影响。然而，这些影响是不同的，并取决于微观尺度的地形。
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.