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为研究全球性增温对温带森林生态系统的影响，在长白山采集了１３个树种１５５３株１９８２—１９９１年的年轮样品，对照有关气象资料进行了整理分析．结果表明年轮宽度的变化与气温指标的年际变化之间很难找出一一对应的关系．但与１９８２—１９８６年相比，１９８７－１９９１年年平均气温增加０．４８℃，年轮平均宽度增加６．１％．与海拔下降１７６ｍ相应增温１℃，则使相应的年轮宽度增加５０％．以此计算，年均温增加１℃将使阔叶红松林的材积生长增加０．６—３．１ｍ３ｈａ－１·ｙｒ－１．年轮生长的加快可能主要和夜间增温有关．鉴于阔叶树对增温更加敏感，增温还可能使红松林中阔叶树比例增加．
In order to study the impact of global warming on temperate forest ecosystems, 1553 annual ring samples from 13 different tree species from 1982 to 1991 were collected from Changbai Mountain and analyzed according to relevant meteorological data. The results show that it is difficult to find a one-to-one correspondence between the change of annual width and the interannual change of temperature index. However, compared with 1982-1986, the average annual temperature in 1987-1991 increased by 0.48 ℃, and the average annual ring width increased by 6.1%. Correspondingly, the corresponding annual ring width is increased by 50% when the temperature is increased by 1 ℃ corresponding to the elevation of 176m. According to this calculation, the increase of annual temperature by 1 ℃ will increase the volume growth of broad-leaved Korean pine forests by 0.6-3.1m3ha-1 · yr-1. The accelerated growth of annual rings may be mainly related to warming at night. Given that broadleaf trees are more sensitive to warming, warming may also increase the proportion of broad-leaved trees in Korean pine forests.