摘要
随着冰期(阶)与间冰期(阶)旋回的不断细化,第四纪冰期系列与深海氧同位素阶段(MIS)对比之间所反映的问题开始逐步显现。通过中国第四纪冰期与MIS阶段对比,结合分析气候旋回与构造运动对地貌演化的控制作用,研究表明:①冰期(阶)或者间冰期(阶)发生的时段应尽可能对应于MIS的偶数或奇数阶段,有助于MIS框架下新的冰期(阶)的发现;②中更新世以来,中国第四纪冰期—间冰期旋回可能受控于100 ka轨道偏心率变化的气候大背景,昆仑冰期—倒数第二次冰期的冰川规模总体上与全球冰量变化一致。然而,末次冰期早、中期的冰川规模却与MIS所记录的全球冰量变化不尽一致,强烈显示气候与构造环境对冰川作用的影响;③目前在中国第四纪冰期划分方案中,存在着冰期系列由时间和地点双重命名的现象,建议用大理冰期、古乡冰期分别代替末次冰期和倒数第二次冰期。
With the development of Quaternary glacier research and the increase of the absolute ages, comparison of glacial sequence and marine isotope stage （MIS） is better than before. The further division of glaciation （glacial stage） and interglacial （interglacial stage） lead to the emergence of some problems reflected by the influence of the procedures of traditional glaciation on the comparison between Quaternary glaciation in China and MIS. The main problems are as follows： the glacial sequence with absolute ages corrected the previous glaciation division according to the relative geomorphology, however, the modified results have not propagated as soon as possible. The correlation between glaciation and the even stage of MIS is not reasonable. Logical contradiction exists in the comparison between the glaciation, interglacial and MIS. An abuse of double name with time and location of the glacial sequence exist in the division of Quaternary glaciation in China at present. According to the comparison between Quaternary glaciation in China and MIS, together with the research of control of climate change and tectonic movement on the evolution of the geomorphology, main conclusions can be drawn as follows. （1） It is useful to find one or more new events of Quaternary glacial advance when correlating the glaciation （glacial stage） or inter-glacial （stage） to the even stage of the MIS in the future. （2） As the influence of 100 ka ratio of the earth orbit, the glacial development in China has been greatly influenced by the major climate change since the middle Pleistocene. The glacial extents are accordant with the global ice volume from the Kunlun glaciation to Zhonglianggan glaciation. However, the glacial extents of the early and/or middle stages were not consistent with the global ice volume during the last glacial cycle. It is intensively indicated that the glacial occurrence might depend on the coupling control of the regional climate and the tectonic uplift. The name of different glacial
出处
《地理研究》
CSSCI
CSCD
北大核心
2013年第4期628-637,共10页
Geographical Research
基金
国家自然科学基金项目(40971010
40571016
40271093
41230743)
关键词
第四纪
冰期
间冰期
深海氧同位素
中国
Quaternary
glaciation
interglacial
marine isotope stage
China
