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冰川冻土 ›› 1988, Vol. 10 ›› Issue (2): 117-124.doi: 10.7522/j.issn.1000-0240.1988.0016

• 研究论文 • 上一篇    下一篇

第四纪气候变化的旋回和周期

赵景波   

  1. 西安地质学院水工系
  • 收稿日期:1986-10-03 修回日期:1987-02-17 出版日期:1989-05-25 发布日期:2012-04-26

The Cycles and Periods of the Quaternary Climate Change

Zhao Jingbo   

  1. Xian College of Geology
  • Received:1986-10-03 Revised:1987-02-17 Online:1989-05-25 Published:2012-04-26

摘要: 在西安附近黄土剖面中发现40层古土壤,分别出现在中、早更新世,可将西安黄土沉积以来的气候变化划为25个旋回。在陕西洛川和河北平原也有相似的气候变化。根据古地磁年代,得出第四纪气候变化的基本周期为10万年左右。全球气候变化基本是统一的,研究结果的不同只是由于研究地区、剖面和气候标志对气候变化的反应不同造成的。

关键词: 第四纪气候变化, 黄土层, 古土壤层, 旋回和周期

Abstract: We have found 40 paleosoil layers which occur not only in the loess of the middle Pleistocene, but also in the loess of the early pleistocene at the Shuijiazhui loess section,Lantian, Xian. According to the loess and paleosoil in the section, 25 climate cycles nearby Xian can be divided since loessdeposition. The 25 cycles were not local climate events restricted in Xian region. Climate change indicated by loess and paleosoil in Luochuan, Shanxi. is similar to that in xian region. 24 cycles have been determined in the light of CaCO3 contents and sporo-pollen materials in river-lake deposits in Hebei plain, since 2430000 Y. B. D. By the age dating in magnetism, we conclude that the basic cycle of the Quaternary climate change is about one hundred thousand years.At present, there are two kinds of completelty different methods of dividing the Quaternary climate in the world. The main difference of the two methods is not due to inconsist ency of climate change, but to the different areas, sections and climate marks in study that are not identical in sensitivity to climate changes.The division at four, five or six glacial periods and interglacial preiods on the basis of the glacial till and glacial eroson landform is not entire. But there is little difference in the number of glacial periods and interglacial periods in many areas in the world,and there are4-6 coldresistant vegtation periods, corresponding toglacial periods in the glacial regions, indicated by sporo-pollen materials in the areas where the Quaternary glacier did not occur, there fore we infer that there were four, five or six periods in the Quaternary in which the climate change range was greater than other periods.

Key words: Quaternary climate change, loess loyers, peleosoil layers, cycles and periods