气候和地貌对晚第四纪冰川发育差异性的影响  

Discussion of the difference of the timing and extent of glaciers in the late Quaternary controlled by the westerly and East Asia monsoon as well as the tectonic movement

作　　者：张威[1] 董应巍[1] 于治龙[1] 贺明月[1] 

机构地区：[1]辽宁师范大学城市与环境学院,大连116029

出　　处：《地理学报》2013年第7期909-920,共12页Acta Geographica Sinica

基　　金：国家自然科学基金项目(40971010;40271093;41230743)~~

摘　　要：中国第四纪冰川作用极大地推动了高亚洲乃至全球冰川形成机制的探讨。青藏高原以及喜马拉雅山地冰川作用的时限和规模研究得到了广泛关注，为西风带与西南季风带对晚第四纪冰川作用差异性问题的解决提供了有利条件。然而，对于中亚西风环流与东亚季风环流影响下的冰川演化差异性关系不甚明确，两大气候系统控制下的山地第四纪冰川的冰进时序、冰期历史和冰川规模显示出不同特点，其差异性主要体现在：西部山地的冰期启动时间早，冰川规模随时间而逐渐缩小，冰川历史较为完整，绝对年代证据显示冰川作用的启动时间是450ka左右的中梁赣冰期（MISl2）；东部山地的冰期历史较短，仅保留末次冰期（～75ka）的冰川遗迹，冰川作用的阶段性明显；冰川演化时间与空间的差异性表明，影响冰川发育的因素不仅仅是区域气候，构造因素也起着相当重要的作用。The mechanism of the evolution of the Quaternary glaciers in the high Asia in the low and middle latitude has been deeply researched during the last several decades with the increase of the absolute dates. Researchers definitely focused on the timing and extent of the glaciers in the Tibetan Plateau and the Himalaya. This provides the beneficial conditions for the recognition of the difference of the glaciers controlled by the westerly and the South Asia monsoon. However, lack of the wide study makes it difticult to examine the correlation of the glaciers evolution with the westerly and the East Asia monsoon in the central Asia and eastern China. Research result shows that the timing and extent between them are different. That is, the onset of the glaciers in the west China is earlier than that in the eastern China with the glacial sequence, and the glacial extent decreased with the time. Compared with the western China, only last glacial remains have been persevered in and along the islands of eastern Asia. The difference of the glacial timing and extent indicates that the factors influencing the glaciers are not only the regional climate but also the tectonic movement.

关 键 词：西风带 东亚季风 冰川作用 冰川规模 

分 类 号：P343.6[天文地球—水文科学]