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内陆封闭湖泊是气候环境变化的敏感指示计。通过对内蒙古岱海湖泊岩芯的有机碳同位素、总有机碳、碳酸盐含量和磁化率等多环境指标的综合分析 ,结合Pb - 2 10测定的沉积速率 ,讨论了岱海地区近千年来的气候环境演化过程。揭示了本区现代小冰期的前期冷湿 ,后期冷干的气候特征。记录的最后两次冷期与根据冰芯、树轮、历史文献重建的 10年平均温度推得的 145 0′s～ 15 10′s、1790′s～ 1890′s两次冷期极相吻合。指出了目前湖泊水面萎缩、环境恶化主要是人类活动的影响所致。
Inland closed lakes are sensitive indicator of climate change. Based on the comprehensive analysis of organic carbon isotope, total organic carbon, carbonate content and magnetic susceptibility in the core of Daihai Lake in Inner Mongolia, combined with the sedimentation rate determined by Pb - 2 10, Climate evolution. Reveals the cold and wet of the early small ice age and the cold and dry climate of the later period in this area. The last two cold periods recorded are in good agreement with the two cold periods of 145 0’s to 15 10’s and 1790’s to 1890’s based on the 10-year average temperature reconstructed from ice cores, tree rings, and historical documents . It is pointed out that the current water level in the lake is shrinking and the environmental deterioration is mainly caused by the human activities.