地理科学

地理科学 ›› 1999, Vol. 19 ›› Issue (2): 119-124.doi: 10.13249/j.cnki.sgs.1999.02.119

• 论文 • 上一篇    下一篇

青土湖近6000年来沉积气候记录研究——兼论四五世纪气候回暖

王乃昂, 李吉均, 曹继秀, 蔡为民   

  1. 兰州大学地理学系 兰州 730000
  • 收稿日期:1998-03-30 修回日期:1998-09-24 出版日期:1999-03-20 发布日期:1999-03-20
  • 基金资助:
    国家自然科学基金重大项目(编号49731010);博士后科学基金

A PRELIMINARY RESEARCH ON THE CLIMATIC RECORDS OF LACUSTRINE DEPOSITS OF QINGTU LAKE IN THE LAST 6000 YEARS

Wang Nai’ang, Li Jijun, Cao Jixiu, Cai Weimin   

  1. Department of Geography, Lanzhou University, Lanzhou 730000
  • Received:1998-03-30 Revised:1998-09-24 Online:1999-03-20 Published:1999-03-20

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被引次数

85

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。

Abstract: 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, Fe3+/Fe2+ 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 This warm period could be further testfied by a lot of evidence obtained from the historical documents and the natural records of Qinghai Lake.

中图分类号: 

  • P532