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冰川冻土 ›› 2003, Vol. 25 ›› Issue (5): 510-516.

• 冰冻圈与全球变化 • 上一篇    下一篇

末次冰期冰川规模与冰川“异时”、“同时”问题的讨论

崔之久, 张威   

  1. 北京大学, 环境学院, 北京, 100871
  • 收稿日期:2003-03-21 修回日期:2003-06-20 出版日期:2003-10-25 发布日期:2012-04-26
  • 作者简介:崔之久(1933-), 男, 安徽宣城人, 教授, 1955年毕业于南京大学地理系, 主要从事冰川、冰缘地貌与环境研究.E-mail:czj@urban.pku.edu.cn
  • 基金资助:
    国家自然科学基金项目(4007015)资助

Discussion about the Glacier Extent and Advance/Retreat Asynchrony during the Last Glaciation

CUI Zhi-jiu, ZHANG Wei   

  1. College of Environmental Sciences, Peking University, Beijing 100871, China
  • Received:2003-03-21 Revised:2003-06-20 Online:2003-10-25 Published:2012-04-26

摘要: 亚洲末次冰期冰川发育特征的深入研究表明,末次冰期冰川规模早期大于晚期.最近,国内外已经注意到末次冰期中期(MIS3b)存在全球性质的降温时段,此时湿度大,并与低温相结合,引起冰川前进的规模也大于干冷的末次冰盛期(LGM),指示末次冰期以来的冰川演化不仅仅是亚洲自身的区域性特点,而且有可能带有全球性.同时,东亚沿海山地冰川发育表现为与大陆内部不一致的特征,说明即使在同一季风系统条件下,由于地理位置、水热条件的不同,也可以引起冰川演化的区域分异,呼应早期提出的冰川发育"异时性"理论.从研究末次冰期冰川发育规模入手,讨论西风带与季风带对冰川发育规模的影响,结合其它地区末次冰期冰川发育特点,进而得出:由于海地汽系统循环在不同区域、不同时期对冰川发育影响不同,在各地冰川最大前进规模和时间是一致或不一致的,在10ka和30ka时间尺度上冰川发育可能存在"同时"和"异时"两种情况.

关键词: 末次冰期, 同时性, 异时性, 季风, 冰川规模

Abstract: It has been accepted that the glacier extent in the early stage was longer than that in the late stage in eastern Asia during the Last Glaciation. However, a new view has been proposed mentioning that there was a global temperature-decreasing phase in the middle stage(MIS 3b, 54~44 ka BP), when the glacier extent was larger than that in the Last Glacial Maximum due to the low temperature coming up against high moisture. It is revealed that the Quaternary glaciers not only evolved with localization, but also maybe with globalization. Meanwhile, the latest studies show a fact that the developmental characteristics of glaciers in high mountains or islands along the west Pacific Ocean is disaccorded with that in the inner land. Therefore, an important conclusion can be drawn that the glacier development exhibits a regional difference. The study validates the reasonableness of the asynchronous advance theory, and makes sure that both the synchronous and asynchronous advance/retreat of glaciers existed from 30 ka BP to 10 ka BP.

Key words: Last Glaciation, asynchronous advance, monsoon

中图分类号: 

  • P343.6