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中文摘要：
越来越多的代理记录同意了冰川的周期的频率象一样早是在 MPT (中间的更新世转变) 前的大约 40 ka 从 3.0 妈晚第三级到 0.9 妈，而它在 MPT 以后改变到大约 100 ka。在在北半球的高纬度的夏天曝晒，通常为冰川期看作了主要外部力量，被 23 ka 领前时期统治，它不匹配冰川的周期的时期。在这篇论文，我们定义精力索引 C 和它显示网精力供应和气候系统的全面反应的阀值 Ct。这二个参数之间的差别决定冰表是否，并且因此融化冰川的摆动的间冰期的阶段，以及频率的开始和结束。基于精力阀值假设，初步的模拟实验被做测试冰川的周期的时期并且从一个概念的模型驾驶因素。结果显示 ene gy 索引 Cand 阀值 Ct 能在 MPT ，而且 quasi-100 ka 前解释不仅 40 ka 频率在到某程度的 MPT 以后的频率，和 40 ka 是冰川的周期的基本时期，它在 MPT 前后揭示气候的变化的固有的连续性。
英文摘要：
More and more proxy records approved that the periodicity of the glacial cycles is about 40 ka before MPT （middle Pleistocene transition） as early as late Tertiary from 3.0 Ma to 0.9 Ma, whereas it changes to about 100 ka after MPT. Summer insolation at high latitude in Northern Hemisphere, usually considered as the main external force for the ice age, is dominated by the 23 ka precession period, which does not match the period of the glacial cycles. In this paper, we define an energy index C and its threshold Ct that indicate the net energy supply and the overall response of the climate system. The difference between these two parameters determines whether the ice sheet melts or not, and accordingly the start and termination of the interglacial stages, as well as the periodicity of glacial oscillations. Based on the energy threshold hypothesis, the preliminary simulation experiments are made to test the period of the glacial cycles and driven factors from a conceptual model. The results indicate that energy index C and threshold Ct can interpret not only the 40 ka periodicity before MPT, but also the quasi-100 ka periodicity after MPT to some extent, and the 40 ka is the basic period of the glacial cycles, which discloses the inherent continuity of climatic change before and after MPT.
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