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中国沙漠 ›› 2000, Vol. 20 ›› Issue (4): 375-377.

• 论文 • 上一篇    下一篇

末次间冰期以来中国西北部沙漠边缘区夏季风变化初步研究

刘志刚1, 潘保田1,2, 邬光剑1, 管清玉1   

  1. 1. 兰州大学 地理科学系, 甘肃 兰州 730000;
    2. 中国科学院 地理研究所, 北京 100101
  • 收稿日期:2000-01-17 修回日期:2000-04-14 出版日期:2000-12-20 发布日期:2000-12-20
  • 作者简介:刘志刚(1974-),男(汉族),湖南娄底人,硕士,主要从事地貌与第四纪研究工作。
  • 基金资助:
    国家自然科学基金项目(49731010);教育部优秀青年教师基金项目资助

Initial Research of Summer Monsoon Change at Desert Marginal Zone in the North-west of China Since the Last Interglacial

LIU Zhi-gang1, PAN Bao-tian1,2, WU Guang-jian1, GUAN Qing-yu1   

  1. 1. Department of Geography, Lanzhou University, Lanzhou 730000, China;
    2. Institute of Geography, Chinese Academy of Science, Beijing 100101, China
  • Received:2000-01-17 Revised:2000-04-14 Online:2000-12-20 Published:2000-12-20

摘要: 通过对祁连山东段沙沟河黄土剖面CaCO3含量、色度代用指标的综合分析,结合14C和热释光测年结果,揭示出了沙漠边缘区夏季风在末次间冰期(S1)表现出5次增强时期。从指标曲线上能够反映出千年尺度的气侯变化,与GRIP孔的气候记录有很好的耦合性。这种气候不稳定性可能受控于高纬冰盖的变化,体现出全球气候性特点。在末次冰期,夏季风的反映就弱得多,气候长期表现为干冷,可能由于青藏高原的抬升,以及靠近沙漠边缘区,使夏季风在冰期难以到达,表现出区域性气候特点。

关键词: 末次间冰期, 沙漠边缘区, 夏季风, 中国西北部

Abstract: Through composite analysis of CaCO3 content,colour substitute parameter in the Shagou loess section in the east of Qilian mountain and dating result of 14C,TL,it is suggested that summer monsoon has five enhancing periods in the last interglacial,reflecting the climatic change of millenium scale from parameter curves,which is well consistent with GRIP record.The climatic instability may be controlled by the change of high latitude ice-sheet and shows the character of the globe climate.In the last glacial,summer monsoon was weak,climate was dry and cold in the long period,which maight be resulted by the uplift of Qinghai-Xizang plateau and the research region was adjacent to the Tengger desert,which made it difficult for summer monsoon to reach in the last glacial,so it showed regional climatic character.

Key words: the last interglacial, desert marginal zone, summer monsoon, northwestern China

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