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以福建仙山泥炭沉积物色度为例,分析其与有机碳(TOC)含量的关系,进一步探究泥炭沉积环境的演化历史及原因.结果显示,研究区气候演化大致分3个阶段:岩芯358~280 cm(AD 600~910年),L*较低,TOC含量较高,说明植物有机体供应充分,揭示气候相对较干;岩芯280~40 cm(AD 910~1640年),L*总体偏高,TOC含量总体偏低,说明此阶段气候总体偏湿润,期间存在干湿波动;岩芯40~0 cm(AD 1640年至今),L*迅速转低,TOC含量偏高,表明气候较干燥.仙山泥炭沉积揭示的古气候变化特征是区域环境对中世纪暖期、小冰期和现代暖期等典型气候时段的区域响应,泥炭色度L*值参数与气候变化的一致性为利用L*探究区域沉积环境的变化提供了重要参考.
Taking the color of peat sediment in Xian Mountain of Fujian Province as an example, the relationship between the peat sediments and the content of organic carbon (TOC) was analyzed, and the evolution history and reasons of peat depositional environment were further explored.The results showed that the climate evolution of the study area was divided into three stages: 280 cm (AD 600 to 910 years), lower L * and higher TOC content, indicating that the plant organisms are fully supplied, revealing that the climate is relatively dry; core 280-240 cm (AD 910-1640) High and low TOC, indicating that the climate at this stage was generally wet with dry and wet fluctuations during the period. L 40 ~ 0 cm (AD 1640 to present), L * rapidly decreased and TOC content was high, indicating that the climate is drier The paleoclimatic changes revealed by the peat deposits in the area are the regional responses of the regional environment to the typical climatic periods such as the warm period of the Middle Ages, the small ice age and the modern warm period. The consistency of the peat color L * Regional sedimentary environment changes provide an important reference.