晚冰期大兴安岭植被气候变化的气孔器记录

发布时间：2019-03-15 18:55

【摘要】：月亮湖末次盛冰期到早全新世湖泊沉积物气孔器分析的结果,揭示了大兴安岭地区以落叶松为主的针叶树演化历史:15.0 cal ka BP之前研究地点周围没有针叶树生长;15.0~12.8 cal ka BP开始到达研究区,在植被中所占比例逐渐升高;12.8~11.8 cal ka BP所占比例达到峰值,11.8~10.8 cal ka BP针叶树成分退缩.大兴安岭地区晚冰期的森林群落演化与东亚季风区不同纬度区域的植被演替具有可比性.气孔器和花粉记录揭示的植被演化阶段在时间上与欧洲地区Meiendorf间冰段、Oldest Dryas冷事件、B?lling-Aller?d暖期、Younger Dryas冷期以及早全新世温暖湿润期较为一致,温度变化是控制植被变化的主要因素.研究区的植被演替响应了全球冰量控制的北半球温度变化,揭示了东亚中纬度地区与北大西洋地区晚冰期快速气候变化的同步性.
[Abstract]:The results of stomatal analysis of lake sediments from the last glacial period to the early Holocene in Yueliang Lake revealed the coniferous evolution history of Larix gmelinii mainly in Daxinganling area: no conifers grew around the study site before 15.0 cal ka BP; 15.0 / 12.8 cal ka BP began to reach the study area, and the proportion of vegetation increased gradually, 12.8 / 11.8 cal ka BP reached its peak and 11.8 / 10.8 cal ka BP coniferous component retreated. The forest community evolution in the late glacial period in the Daxinganling region is comparable to the vegetation succession in different latitudes of the East Asian monsoon region. The time of vegetation evolution revealed by stomatal and pollen records is consistent with the, Oldest Dryas cold events in the interglacial segment of the Meiendorf in Europe, the, Younger Dryas cold period in the B?lling-Aller?d warm period and the warm wetting period in the early Holocene. Temperature change is the main factor controlling vegetation change. The vegetation succession in the study area responds to the temperature change in the Northern Hemisphere controlled by global ice volume and reveals the synchronism of the rapid climate change between the mid-latitude region of East Asia and the North Atlantic region during the late glacial period.
【作者单位】：中国科学院地质与地球物理研究所中国科学院新生代地质与环境重点实验室;
【基金】：国家自然科学基金(41572353,41202259,41272392,41320104006)资助
【分类号】：Q914.5;P532

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