通过对生长在海拔1950m岳桦的树轮生长特征和气候关系的分析,评价了长白山树线对气候因子的敏感性。结果表明,长白山岳桦树线对气候因子有明显的敏感性,与其它研究不同的是,影响树线处岳桦生长的主要气候因子并不是当年夏季的温度,而是上年冬季的平均最低温度和当年3月的温度。尽管研究区降水量很大,但年轮宽度与上年冬季和当年春季的降水呈显著相关。另外,由于气候因子的年际变化对岳桦径向生长没有明显的影响,因此自20世纪80年代以来的年平均温度的升高并没有在年轮宽度上表现出持续的增加。图2表5参39。 Based on the analysis of the relationship between the growth of tree rings and climate at 1950 m altitude, the sensitivity of climate factors to the Changbai Mountain tree line was evaluated. The results show that the Changbaishan birch tree line has significant sensitivity to climatic factors. Unlike other studies, the main climatic factors affecting the growth of birch birch at the tree line are not the summer temperatures but the lowest ones in the previous year Temperature and the temperature in March of that year. Despite the large amount of precipitation in the study area, the width of the ring is significantly related to the precipitation in the previous winter and the current spring. In addition, the annual mean temperature increase since the 1980s did not show a sustained increase in the width of the annual rings due to the no significant effect of the interannual variability of the climatic factors on the growth of the Betula ermanii. Figure 2 Table 5 Reference 39.