摘要
对青土湖志云村剖面沉积气候记录和湖泊进退进行了研究，证实季风边缘区河西走廊东段存在暖湿、冷干气候变化的阶段性特征。根据湖相沉积的颜色、粒度、化学组成和有机质含量等气候代用指标的综合分析，提出公元四五世纪存在一次百年尺度上的气候回暖，这一气候回暖事件的发现，可得到历史文献记载和青海湖自然记录的佐证。
A preliminary study on the advance and the retreat of Qingtu Lake and its climatic records of the Holocene lacustrine deposits has been made through comprehensive analysis. Based on the study on the lacustrine sedimentary color, grain size, Fe 3+ /Fe 2+ and organic matter, the authors put foward that a warm period existed during the phase of 355-480 A.D in the studied area. This warm period could be further testfied by a lot of evidence obtained from the historical documents and the natural records of Qinghai Lake.
出处
《地理科学》
CSCD
北大核心
1999年第2期119-124,共6页
Scientia Geographica Sinica
基金
国家自然科学基金重大项目
博士后科学基金
关键词
青土湖
全新世
湖相沉积
气候记录
古气候
Qingtu Lake
Holocene
Lacustrine deposits
Climatic records
Warm period of 355-480 a A.D.
