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中国沙漠 ›› 1996, Vol. 16 ›› Issue (1): 9-12.

• 论文 • 上一篇    下一篇

800Ka B.P.来西藏“一江两河”中游地区的气候与西南季风变化

靳鹤龄1, 董光荣1, 李森1, 刘玉璋1, 申建友1, 曹继秀2   

  1. 1. 中国科学院兰州沙漠研究所, 兰州 730000;
    2. 兰州大学地理系, 兰州 730000
  • 收稿日期:1995-04-12 修回日期:1995-08-04 出版日期:1996-03-20 发布日期:1996-03-20
  • 作者简介:靳鹤龄,男,1963年4月生,理学硕士,助理研究员。主要从事干早区地貌与第四纪地质研究。
  • 基金资助:

    国家自然科学基金项目(49423001,49471009)、西安黄土与第四纪地质国家重点实验室基金(9304)、中国科学院兰州沙漠研究所所长基金资助

THE CLIMATE AND SOUTHWEST MONSOON CHANGE IN THE MIDDLE "ONE RIVER TWO TRIBUTARIES" BASIN, TIBET SINCE 0. 80 MA B.P.

Jin Heling1, Dong Guangrong1, Li Sen1, Liu Yuzhang1, Shen Jianyou1, Cao Jiziu2   

  1. 1. Institute of Desert Research, Chinese Academy of Sciences, Lanzhou 730000;
    2. Geograph Department, Lanzhou Univercity 730000
  • Received:1995-04-12 Revised:1995-08-04 Online:1996-03-20 Published:1996-03-20

摘要:

西藏"一江两河"中游地区风成地层沉积时代、沉积相和磁化率等研究结果表明, 早在800KaB.P.前西南季风就已存在, 受全球气候波动和青藏高原隆起的影响, 其盛行衰变与东南季风具有较好的一致性, 主要表现为本区地层所记录的气候变化信息不如东南季风区详细; 而且西南季风因高原屏障作用给本区带来的降水愈来愈少, 气候明显地向干冷化发展。

关键词: 青藏高原, 风成堆积, 季风变化

Abstract:

Based on the depositional age, sedimentary facies and susceptibility. This poper deals with the climate and southwest mosoon change in middle Yarlung Zangbo River Basin in Tibet, which lies in the temperate and semi-arid, monsoonal areas in Qinghai-Xizang Plateau. The result indicates the southwest mosoon circulation had been existent before 0. 80 Ma B.P., and climatic change in this area coincides with that in eastern China and global changes. But there is difference between them. It shows mainly that the climate had been becoming cold-dry in this area since 518 ka B.P. due to glacial/interglacial climatic fluctuations and Qinghai-Xizang Plateau uplift.

Key words: Qinghai-Xizang Plateau, Aeolian deposition, Monsoon change