Extra-long interglacial in Northern Hemisphere during MISs 15-13 arising from limited extent of Arctic ice sheets in glacial MIS 14.
Extra-long interglacial in Northern Hemisphere during MISs 15-13 arising from limited extent of Arctic ice sheets in glacial MIS 14.
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MIS 15-13期间北半球的超长间冰期源于冰川MIS 14中北极冰盖的有限范围
DOI：
10.1038/srep12103
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发表时间：
2015-07-10
影响因子：
4.6
通讯作者：
Guo Z
中科院分区：
文献类型：
--
作者：
Hao Q;Wang L;Oldfield F;Guo Z
了解北半球（NH）冰盖在过去百万年的行为对于理解轨道驱动的日晒变化在冰期/间冰期旋回中的作用至关重要。基于中国黄土粒度变化与北半球冰盖范围之间的联系，我们利用黄土粒度记录证实了北半球冰盖在海洋氧同位素阶段（MIS） 14受到限制。因此，在MISs 15 - 13期间，一个超过100 kyr的NH间冰期气候持续了很长时间，比海洋氧同位素记录所预期的要长得多。从古气候记录的全局来看，MIS 14的开始似乎是对南极冰盖变化的反应，而不是对北半球变冷的反应。两极地区的轨道结构表明，MIS 14的发生是由南方日照变化引起的，而不是像Milankovitch理论所提出的那样是由北方夏季日照引起的。我们对MIS 14的分析提出了一种可能性，即南方日照强迫可能在其他几个冰期的开始中发挥了重要作用。研究认为，15 ~ 13年间超长的NH间冰期气候为非洲古人类向欧亚大陆的第二次大规模扩散提供了有利条件。
Knowledge of the behavior of Northern Hemisphere (NH) ice sheets over the past million years is crucial for understanding the role of orbitally driven insolation changes on glacial/interglacial cycles. Here, based on the demonstrable link between changes in Chinese loess grain-size and NH ice-sheet extent, we use loess grain-size records to confirm that northern ice-sheets were restricted during marine oxygen isotope stage (MIS) 14. Thus, an unusually long NH interglacial climate of over 100 kyr persisted during MISs 15−13, much longer than expected from marine oxygen isotope records. Taking a global view of the paleoclimate records, MIS 14 inception seems to be a response to changes in Antarctic ice-sheets rather than to NH cooling. Orbital configuration in the two Polar regions shows that the onset of MIS 14 was forced by austral insolation changes, rather than by boreal summer insolation, as Milankovitch theory proposes. Our analysis of MIS 14 raises the possibility that southern insolation forcing may have played an important role in the inception of several other glacials. We suggest that the extra-long NH interglacial climate during MISs 15−13 provided favorable conditions for the second major dispersal episode of African hominins into Eurasia.
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40万年日照变化最小值期间北极冰盖的延迟形成
影响因子：
64.8
作者：
Hao, Qingzhen;Wang, Luo;Guo, Zhengtang
通讯作者：
Guo, Zhengtang
影响因子：
56.9
作者：
Clark, PU;McCabe, AM;Weaver, AJ
通讯作者：
Weaver, AJ
DOI：
10.1073/pnas.0904119106
发表时间：
2009-09-22
影响因子：
11.1
作者：
Hublin, J. J.
通讯作者：
Hublin, J. J.
根据中国黄土和南极洲冰记录的关联推断 MIS-13 期间半球气候的强烈不对称性
影响因子：
4.3
作者：
Guo, Z. T.;Berger, A.;Qin, L.
通讯作者：
Qin, L.
影响因子：
4
作者：
Boese, Margot;Luethgens, Christopher;Rose, James
通讯作者：
Rose, James