Phase-lagged warming and disruption in climatic rhythm during the Matuyama-Brunhes magnetic polarity transition
Phase-lagged warming and disruption in climatic rhythm during the Matuyama-Brunhes magnetic polarity transition
复制标题
松山-布鲁内斯磁极性转变期间的滞后变暖和气候节律的破坏
DOI：
10.1016/j.gr.2011.07.005
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发表时间：
2012
影响因子：
6.1
通讯作者：
Ikuko Kitaba
中科院分区：
文献类型：
--
作者：
Kashiwaya;K.;Okimura;T.;Ikuko Kitaba
地磁场对气候的影响是一个长期存在争议的问题。50 cm/kyr）沉积物柱样。在海洋氧同位素阶段（MIS）20至18期间，气候变化与岁差循环中的全球冰量变化有很好的相关性，但MIS 19的前半部分除外。20.2亚阶段之后的冰后期变暖被19.3亚阶段相关的海平面高点之前开始的冷却中断，并持续到19.3和19.2之间的中点，随后迅速变暖。热最大值明显晚于最高海平面6- 7 kyr，轨道强迫和气候之间的联系被破坏。在MB转换期间，冷却事件与古强度低的中心一致。这种跨越海平面峰值的异常气候变冷很可能与场强降低有关。大坂湾的数据可能表明地磁场在过去影响气候的一个例子。
The influence of the geomagnetic field on climate, a long hotly disputed issue, was examined for the Matuyama–Brunhes (MB) magnetic polarity transition using palynological and paleomagnetic data sets from a high accumulation rate (ca. 50cm/kyr) sediment core from Osaka Bay. During the period from marine oxygen isotope stages (MIS) 20 to 18, climate change is well correlated with global ice volume variation in the precession cycle, with the exception of the early half of MIS 19. The postglacial warming after substage 20.2 was interrupted by cooling that began just before the sea-level highstand correlated with substage 19.3 and persisted until about a mid-point between 19.3 and 19.2, followed by a rapid warming. The thermal maximum clearly postdates the highest sea-level highstand by 6–7kyr, and the connection between orbital forcing and climate was disrupted. The cooling event coincided with the center of the paleointensity low during the MB transition. This unusual climate cooling across a sea-level peak is very likely related to the field intensity decrease. The data from Osaka Bay may suggest an instance where the geomagnetic field has influenced climate in the past.