地理学报 ›› 2008, Vol. 63 ›› Issue (3): 280-292.doi: 10.11821/xb200803006

• 地貌与第四纪 • 上一篇    下一篇

13 ka BP 以来黄土高原西部的植被与环境演化

孙爱芝1,2, 冯兆东2, 唐领余3, 马玉贞4   

  1. 1. 西南大学地理科学学院, 重庆400715;
    2. 兰州大学西部环境教育部重点实验室, 兰州730000;
    3. 中国科学院南京地质古生物研究所, 南京210008;
    4. 北京师范大学资源学院, 北京100875
  • 收稿日期:2007-10-20 修回日期:2007-11-27 出版日期:2008-03-25 发布日期:2010-08-04
  • 作者简介:孙爱芝(1979-), 副教授, 博士, 主要从事孢粉学与第四纪环境变化研究。E-mail: saz79@swu.edu.cn
  • 基金资助:

    国家杰出青年基金项目(40025105); 国家自然科学重点项目(40331012); NSF 项目(EAR 0402509; BCS 00-78557); 西南大学科技基金资助项目(104220-20710904)

Vegetation and Climate Changes in the Western Part of the Loess Plateau since 13 ka BP

SUN Aizhi1,2, FENG Zhaodong2, TANG Lingyu3, MA Yuzhen4   

  1. 1. School of Geography Science, Southwest University, Chongqing 400715, China;
    2. MOE Key Laboratory of Western China's Environmental Systems, Lanzhou University, Lanzhou 730000, China;
    3. Nanjing Institute of Geology and Palaeontology, CAS, Nanjing, 210008, China;
    4. College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
  • Received:2007-10-20 Revised:2007-11-27 Online:2008-03-25 Published:2010-08-04
  • Supported by:

    National Science Fund for Distinguished Young Scholars, 40025105; National Natural Science Foundation of China, No.40331012; NSF Project, No.EAR 0402509; No.BCS 00-78557; Sci-tech Fund from Southwest University, No.104220-20710904

摘要:

通过对黄土高原西部三个剖面的孢粉记录分析, 重建了该区13 ka BP 以来详细的植被 与气候演化序列。结果表明, 12.1 ka BP 以前, 研究区植被以干草原为主, 气候寒冷干燥。 12.1~9.8 ka BP 植被变化显著。期间出现两次显著的湿润期, 分别为12.1~11.4 ka BP、 11.2~11.0 ka BP, 可与博令暖期和阿勒罗得暖期对比; 两次持续时间和强度明显不同的干旱 期出现在11.4~11.2 ka BP 和11.0~9.8 ka BP, 可分别与中仙女木事件和新仙女木事件对比。 经过短暂的快速变湿后, 9.6~7.6 ka BP 研究区植被以疏林草原为主, 气候波动频繁但总体温 和偏干。7.6~4.0 ka BP 森林和森林草原植被出现, 气候温暖湿润。其中6.6~5.8 ka BP 温带落 叶阔叶林发育, 为研究区全新世最适宜期。自4.0 ka BP 以来研究区草原和荒漠草原交替出 现, 气候在总体干冷的环境下存在次一级的干湿波动。

关键词: 黄土高原西部, 孢粉组合, 植被, 环境变化

Abstract:

Sporo-pollen records from the western part of Chinese Loess Plateau revealed a detailed history of vegetation variation and associated climate changes since 13 ka BP. Before 12.1 ka BP, steppe or desert-steppe vegetation dominated landscape, which was then replaced by a coniferous forest under a generally wet climate (12.1-11.0 ka BP). The vegetation was degenerated into steppe landscape and further into a desert-steppe landscape from 11.0 to 9.8 ka BP. After a brief episode of a cool and wet climate (9.8-9.6 ka BP), a relatively mild and dry condition prevailed during the early Holocene (9.6-7.6 ka BP). The most favourable climate of warm and humid period occurred during mid-Holocene (7.6-4.0 ka BP) marked by forest-steppe landscape, and an alternation of steppe and desert-steppe has occurred since ~4.0 ka BP.

Key words: Loess Plateau, arid and semi-arid region, sporo-pollen assemblage, climate change