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在探讨有机碳含量及其稳定碳同位素的环境指示意义基础上,对张北高原安固里淖湖泊沉积物进行了分析,重建了安固里淖近400年来的气候环境演变格局。安固里淖沉积物中总有机碳含量的变化间接反映了区域气温的变化,有机碳同位素值的变化与湖泊水位波动导致的湖泊水生植物种类的改变有关。在钻孔岩芯定年的基础上,认为安固里淖地区从约1630 AD开始气候逐渐变冷,到1840~1890 AD为温度最低点,随后气候变暖;相对于温度的变化过程,从约1630 AD开始,气候逐渐向湿润方向发展,到约1770~1840 AD期间气候最为湿润,之后气候逐渐变干。
On the basis of exploring the significance of organic carbon content and its environmental significance of stable carbon isotope, the lake sediments in Angulizhang of Zhangbei Plateau were analyzed and the evolution of climatic and environmental conditions in the past 400 years was rebuilt. The changes of total organic carbon in the sediments of Angulila indirectly reflect the change of regional air temperature. The changes of the isotopic values of organic carbon are related to the changes of the types of aquatic macrophytes in the lake. On the basis of the borehole core dating, it is considered that the Angolan area starts to cool gradually from about 1630 AD to the lowest temperature from 1840 to 1890 AD, and then warms; with respect to the temperature change, from about Beginning with the 1630 AD, the climate gradually moved towards wetness, with the most humid climate from about 1770 to 1840 AD, after which the climate gradually became drier.