论文部分内容阅读
根据高分辨率湖泊沉积的有机碳稳定同位素记录、硅藻等环境指标分析结果，将洱海全新世大暖期（８．１—３．０ｋａ Ｂ．Ｐ．）的环境演化分为７个阶段，环境变化序列以温（暖）湿－暖（温）干为主，其中存在明显冷干（湿）事件，冷事件出现在７．２ｋａ Ｂ．Ｐ．、５．３ｋａ Ｂ．Ｐ．和３．７ｋａＢ．Ｐ．。全新世大暖期洱海湖面波动与气候变化具有明显的一致性。洱海湖泊沉积记录的环境演化主要受亚洲季风强弱转换和时空迁移的影响，冷事件与亚洲冬季风加强有关，暖干气候受东亚夏季风加强影响，温（暖）湿气候反映西南季风加强。
Based on the results of environmental carbon isotope records and diatoms in high-resolution lake sediments, the environmental evolution of the Holocene (8.1-3.0ka B.P.) in the Erhai Lake is divided into seven stages, The sequence of environmental changes is mainly warm (warm) wet-warm (warm), with obvious cold dry (wet) events and cold events 7.2ka B. P. , 5.3ka B. P. And 3.7kaB. P. . During the Great Holocene, there was a clear agreement between the fluctuation of Lake Erhai and climate change. The environmental evolution of sedimentary records in Erhai Lake is mainly affected by the change of the strength and weakness of the Asian monsoon and the migration of time and space. The cold event is related to the strengthening of the Asian winter monsoon. The warm and dry climate is affected by the intensification of the East Asian summer monsoon and the warm (warm) humid climate reflecting the enhanced southwest monsoon.