地理研究

地理研究 ›› 2004, Vol. 23 ›› Issue (5): 641-648.doi: 10.11821/yj2004050008

• 论文 • 上一篇    下一篇

黄土高原晚更新世的植被与气候环境

李秉成1,2, 孙建中2   

  1. 1. 西北大学地质学系,陕西西安710054;
    2. 长安大学环境科学与工程学院 陕西西安710069
  • 收稿日期:2003-12-25 修回日期:2004-05-29 出版日期:2004-10-15 发布日期:2004-10-15
  • 作者简介:李秉成(1959-),男,陕西府谷县人,西北大学博士生,长安大学副教授。现从事第四纪地质与环境 的研究。
  • 基金资助:

    中科院西安黄土与第四纪地质开放研究实验室基金资助项目(9901611)

Vegetation and climate environment during the late Pleistocene in Loess Plateau, China

LI Bing-cheng1,2, SUN Jian-zhong2   

  1. 1. Department of Geology, Northwest University, Xi’an 710069,China;
    2. School of Environment Sciences and Engineering,Chang’an University, Xi’an 710054,China
  • Received:2003-12-25 Revised:2004-05-29 Online:2004-10-15 Published:2004-10-15

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被引次数

80 | 8

摘要：

通过对黄土高原上陕西洛川、富县省等黄土剖面的地质调查、采样和孢粉分析 ,在曾被人们认为孢粉贫乏的黄土中分析出了大量孢粉 ,作出了黄土地层的孢粉浓度图式。结合其他地区数个剖面上孢粉组合的变化 ,阐明了晚更新世的植被与气候在时间上演变与空间上分布的规律 ,证明了各地植被在时间上的演变韵律十分相似 ,说明它们同受全球气候变化的控制 ;但在同一时期各地植被不尽相同 ,则是局部自然环境差异所致。

关键词: 黄土, 晚更新世, 孢粉, 古气候, 古环境

Abstract:

We have worked out quite a few pollens and spores from the commonly sporopollen poor loess, and plotted some concentration sporopollen diagrams of the loess strata for the first time. The evolution of vegetation and corresponding climate in time and space in the region has been brought to light by an analysis of the variation of sporopollen assemblages in many sections. There are three interstadials, warmer than present and two cooler stadials in the last interglaciation. They are correlated with the substages 5a, 5b, 5c, 5d and 5e of the deep sea oxygen isotopic curves. The climate in the stadials was severely cold, with a mean annual temperature 14℃ lower than the present. The climate in the interstadials was relatively warmer, with a mean annual temperature 3-9℃ lower than the present. The temperature in the stadials of the last interglaciation was the same as that in the interstadials of the last glaciation. The temperature in the interstadials was 1-3℃ higher than the present. It is known by comparing the sporopollen dliagrams from ten sections in the Loess Plateau that the changes of vegetation in time are very similar, implying that they were controlled by the same global climatic change. But the vegetation may vary from place to place due to changes of local natural environment. Vegetation during the late Pleistocene in the Loess Plateau is familiar with vegetation types of the warm-belt generally. When in the case of stadials of the interglaciation and interstadials of the glaciation, the alpine vegetation was descended to the land level, and in the stadials of the last glaciation, steppe or desert steppe landscapes were commonly seen.

Key words: loess, late Pleistocene, sporopollen, paleoclimate, paleoenvironment