The Paleoclimate Changes during the Past Millennium Lnferred from the Lacustrine Core in Daihai Lake, Inner Mongolia
The Paleoclimate Changes during the Past Millennium Lnferred from the Lacustrine Core in Daihai Lake, Inner Mongolia
复制标题
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Cao Jian
中科院分区：
文献类型：
--
作者：
Cao Jian
岱海地处东南季风边缘带和生态交错带，一直是研究古气候变化的重要地区之一。利用沉积物的TOC、δ 13 C org、碳酸盐含量、磁化率和介形类化石等环境指标，对内蒙古岱海近千年来的古气候演化进行了重建。环境多指标分析表明，小冰期早期为冷湿气候，而非冷干气候。沉积物记录的LIA的最后两个冷期与树木年轮、冰芯和历史文献推断的结果一致。根据近百年来的气候特征，提出人类活动已成为近年来湖泊环境恶化的主要原因。
Located in the marginal belt of the southeast monsoon and ecotone, Daihai Lake has always been one of the most significant areas in the studies of paleoclimate change. Environmental proxies, such as TOC,δ 13 C org , carbonate contents, frequency dependent susceptibility and ostracoda fossils of sediment from Daihai Lake, Inner Mongolia, had been employed to reconstructed the paleoclimate evolution during the past thousand years. The environmental multiproxies indicated the cold humid climate, rather than cold dry climate in the early stage of the Little Ice Age(LIA). The last two cold periods of the LIA, recorded by the sediment, were in good agreement with those deduced by tree rings, ice core and historical literature. Based on the climate features in the last hundred years, this paper also advanced that human activities had become the main reason of the lake environmental deterioration in recent years.