【摘要】 小兴安岭植物体中δ13C不仅受区域湿度变化控制,也受温度变化控制。泥炭纤维素的δ13C曲线,较好地响应了小兴安岭地区过去5000年来气候,特别是温度和湿度的演变过程。5.1～3.0kaBP、3.0～1.8kaBP、1.8kaBP迄今,小兴安岭经历了3个千年尺度的气候波动,气候演变过程为温暖湿润→温凉较湿→冷凉较湿。在千年尺度的气候波动上,又叠加着百年尺度的气候变化,在3.0kaBP以来更为显著。相应的,泥炭发育也经历了从富营养、中营养到贫营养阶段。更多还原

【Abstract】 The δ¹³C values of plants in Xiao Hinggan Ling are controlled not only by environmental temperature, but also by humidity. The peat cellulose δ¹³C sequence well reflects variations in climate, especially temperature and humidity in the past 5000 years in Northeast China. During the periods of 5.1-3.0 ka B.P., 3.0-1.8 ka B.P., 1.8 ka B.P. to present, 3 climate fluctuations of millennium scale are recognized in Xiao Hinggan Ling, and a series of climate fluctuations of centennial scale are overlapped, especially from nearly 3.0 ka B.P. The climatic development stages of 5 ka B.P. are characterized by a warm （cool） and humid→cool and humid→cold trend. Correspondingly, the peat development stages follow the order of eutrophic→mesotrophic→oligotrophic.更多还原