地理学报

地理学报 ›› 1988, Vol. 55 ›› Issue (1): 44-51.doi: 10.11821/xb198801005

• 论文 • 上一篇    下一篇

四川西昌螺髻山全新世植被与环境变化

李旭, 刘金陵   

  1. 中国科学院南京地质古生物研究所
  • 出版日期:1988-01-15 发布日期:1988-01-15

HOLOCENE VEGETATIONAL AND ENVIRONMENTAL CHANGES AT MT. LUOJI, SICHUAN

Li Xu Liu, Jinling   

  1. Nanjing Institute of Geology and Palaeontology, Academia Sinica
  • Online:1988-01-15 Published:1988-01-15

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摘要： 通过对沉积物进行孢粉、植物碎屑、硅藻和矿物等的研究和表土的孢粉分析,发现外来孢粉可以远远多于原地沉积的孢粉。并证明该地区在12400年B.P.时,雪线已经高于3660m,从12000年B.P.开始进入全新世。作者在文献[1]中探讨了我国大气透明度系数的空间分布及其主要影响因子。本文则探讨大气透明度系数的时间变化,特别是它的长期变化及其成因。结果发现:火山爆发可使大气透明度系数明显减小;由于人类活动影响,冬季大气透明度系数Pz、Pd有明显的减小趋势,P2、Fd与用煤量等污染指标有很好的负相关。文中还对大气可降水含量的气候学推算方法进行了探讨。

关键词: 全新世, 孢粉, 硅藻, 冷杉, 大海子, 螺髻山

Abstract: Many Quaternary palynologists are enchanted with alpine small lakes, primarily for the reason that the uniform environment around these lakes has been little influenced by human beings, so that a continuous history of the environmental changes, especially in the postglacial period, can be reconstructed by studying the sediments in the lake.

Key words: Holocene, Pollen, Diatom, Abies, Dahaizi Lake, Mt LuojiAtmospheric transparent coefficient, Aerosol, Water vapour, Volcanic erup-tion