应用因子分析法对苏北盆地里下河地区SG剖面中的地化元素和氧化物进行分析,提取出相关古气候信息,重建了苏北盆地里下河地区30~15cal ka BP期间的古气候环境演化序列:30.3~26.0cal ka BP为相对暖湿期;26.0~17.8cal ka BP较为显著的...应用因子分析法对苏北盆地里下河地区SG剖面中的地化元素和氧化物进行分析,提取出相关古气候信息,重建了苏北盆地里下河地区30~15cal ka BP期间的古气候环境演化序列:30.3~26.0cal ka BP为相对暖湿期;26.0~17.8cal ka BP较为显著的冷干期;17.8~15.0cal ka BP以升温为主,冷暖波动剧烈,整体相对暖湿期;另外,在这些大的气候演变背景条件下,也存在着多次明显的气候波动事件。这一研究结果不仅与国内大量的研究资料相一致,而且与深海氧同位素和北半球太阳辐射等曲线也有着很好的对应,表明苏北地区的气候变化具有全球性特征。展开更多
On the basis of lacustrine sedimentary profile of Ebinur Lake,sequences of evolution of paleoclimate and paleoenvironment in Ebinur Lake area have been rebuilt by analysing the sedimentary stratigraphy,bio-stratigraph...On the basis of lacustrine sedimentary profile of Ebinur Lake,sequences of evolution of paleoclimate and paleoenvironment in Ebinur Lake area have been rebuilt by analysing the sedimentary stratigraphy,bio-stratigraphy and gepochemistry as well as the chronological records.The results show that,during the last 10 ha years,the general change trends of the paleoclimate in Ebinur Lake area can be divided into three stages: (1) 10. 2-8.3 ka B. P., a warm-cool dry climate stage;(2) 8.3-3.5 ka B.P.,a warmer moist climate stage (specially,7.3-6. 4 ka B. P.,a relatively stable humid temperate stage);(3) 3. 5 ka B. P.-present, adraught temperate climate stage,similar to the present climate. In addition,there existed clearly several times of secondary undulations of dry-humid climate,i.e. 8.3 ka and 7.3 ka for dry climate展开更多
文摘应用因子分析法对苏北盆地里下河地区SG剖面中的地化元素和氧化物进行分析,提取出相关古气候信息,重建了苏北盆地里下河地区30~15cal ka BP期间的古气候环境演化序列:30.3~26.0cal ka BP为相对暖湿期;26.0~17.8cal ka BP较为显著的冷干期;17.8~15.0cal ka BP以升温为主,冷暖波动剧烈,整体相对暖湿期;另外,在这些大的气候演变背景条件下,也存在着多次明显的气候波动事件。这一研究结果不仅与国内大量的研究资料相一致,而且与深海氧同位素和北半球太阳辐射等曲线也有着很好的对应,表明苏北地区的气候变化具有全球性特征。
文摘On the basis of lacustrine sedimentary profile of Ebinur Lake,sequences of evolution of paleoclimate and paleoenvironment in Ebinur Lake area have been rebuilt by analysing the sedimentary stratigraphy,bio-stratigraphy and gepochemistry as well as the chronological records.The results show that,during the last 10 ha years,the general change trends of the paleoclimate in Ebinur Lake area can be divided into three stages: (1) 10. 2-8.3 ka B. P., a warm-cool dry climate stage;(2) 8.3-3.5 ka B.P.,a warmer moist climate stage (specially,7.3-6. 4 ka B. P.,a relatively stable humid temperate stage);(3) 3. 5 ka B. P.-present, adraught temperate climate stage,similar to the present climate. In addition,there existed clearly several times of secondary undulations of dry-humid climate,i.e. 8.3 ka and 7.3 ka for dry climate