气候变化对中国东北主要森林类型的影响

应用林窗模型-FAREAST,模拟未来气候变化对中国东北主要类型森林演替动态的影响.根据大气环流模型ECHAM5-OM和HadCM3预测的气候变化资料,模拟选择了目前气候情景、增暖情景、增暖且降水变化情景3种气候情景.结果表明:维持目前气候不变,东北森林树种组成和森林生物量基本维持动态平衡.气候增暖不利于东北主要森林类型生长,主要针叶树种比例下降,阔叶树比例增加;温带针阔混交林垂直分布带有上移的趋势;增暖幅度越大,变化越明显.气候增暖基础上考虑降水变化,东北森林水平分布带有北移的趋势,降水对低海拔温带针阔混交林影响不大.

Effects of climate change on typical forest in the northeast of China

By using the forest gap model-FAREAST,we simulated the effects of climate changing in future on forest composition and forest biomass of typical forest type in northeast of China.We chose three different climate change scenarios developed from GCMs results of ECHAM5-OM and HadCM3:current climate,warmer climate and the state of changing precipitation with higher temperature.The results show as follows,if the climate goes with no change,northeastern forest composition and forest biomass will maintain dynamic balance.Warmer climate is unadvantaged to major forest type in the northeast of China,The percentage of major conifers decrease,along with the percentage increase of some broadleaf trees.The Mixed broad-leaved tree species/Korean pine forest belt in temperate zone will tend to move up.And more warmer,more distinct.Taken account of rainfall further,the forest belt of northeast of China will tend to move northward,rainfall has a little effect on the Mixed broad-leaved tree species/Korean pine forests in temperate zone.