极地研究

极地研究 ›› 2003, Vol. 14 ›› Issue (2-English): 99-116.

• 目次 • 上一篇    下一篇

Pollen-based reconstructions of Holocene vegetation and climatic change of Tibetan Plateau

 Tang Lingyu1, Li Chunhai1, Yu Ge2 and Shen Caiming3   

  1. 1 Nanjing Institute of Geology and Palaeontology, CAS, Nanjing 210008, China;
    2 Nanjing Institute of Geology and Limnology, CAS, Nanjing 210008, China;
    3 Louisiana State University, Baton Rouge, LA 70803, USA
  • 出版日期:1953-06-30 发布日期:1953-06-30
  • 通讯作者: Tang Lingyu

Pollen-based reconstructions of Holocene vegetation and climatic change of Tibetan Plateau

Tang Lingyu1, Li Chunhai1, Yu Ge2 and Shen Caiming3   

  1. 1 Nanjing Institute of Geology and Palaeontology, CAS, Nanjing 210008, China;
    2 Nanjing Institute of Geology and Limnology, CAS, Nanjing 210008, China;
    3 Louisiana State University, Baton Rouge, LA 70803, USA
  • Online:1953-06-30 Published:1953-06-30
  • Contact: Tang Lingyu

PDF (PC)

842

摘要：

A synthesis of Holocene pollen records from the Tibetan Plateau shows the history of vegetation and climatic changes during the Holocene. Palynological evidences from 24 cores/sections have been compiled and show that the vegetation shifted from subalpine/alpine conifer forest to subalpine/alpine evergreen sclerophyllous forest in the southeastern part of the plateau; from alpine steppe to alpine desert in the central, western and northern part; and from alpine meadow to alpine steppe in the eastern and southern plateau regions during the Holocene. These records show that increases in precipitation began about 9 ka from the southeast, and a wide ranging level of increased humidity developed over the entire of the plateau around 8-7 ka, followed by aridity from 6 ka and a continuous drying over the plateau after 4-3 ka. The changes in Holocene climates of the plateau can be interpreted qualitatively as a response to orbital forcing and its secondary effects on the Indian Monsoon which expanded northwards during the early Holocene and retreated from the plateau since the mid-Holocene. Also, there is teleconnection between the Tibetan Plateau and North Atlantic.

关键词: pollen, spatial pattern, alpine vegetation, Holocene, Tibetan Plateau

Abstract:

A synthesis of Holocene pollen records from the Tibetan Plateau shows the history of vegetation and climatic changes during the Holocene. Palynological evidences from 24 cores/sections have been compiled and show that the vegetation shifted from subalpine/alpine conifer forest to subalpine/alpine evergreen sclerophyllous forest in the southeastern part of the plateau; from alpine steppe to alpine desert in the central, western and northern part; and from alpine meadow to alpine steppe in the eastern and southern plateau regions during the Holocene. These records show that increases in precipitation began about 9 ka from the southeast, and a wide ranging level of increased humidity developed over the entire of the plateau around 8-7 ka, followed by aridity from 6 ka and a continuous drying over the plateau after 4-3 ka. The changes in Holocene climates of the plateau can be interpreted qualitatively as a response to orbital forcing and its secondary effects on the Indian Monsoon which expanded northwards during the early Holocene and retreated from the plateau since the mid-Holocene. Also, there is teleconnection between the Tibetan Plateau and North Atlantic.

Key words: pollen, spatial pattern, alpine vegetation, Holocene, Tibetan Plateau