A Holocene record of millennial-scale climate changes in the mud area on the inner shelf of the East China Sea
A Holocene record of millennial-scale climate changes in the mud area on the inner shelf of the East China Sea
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DOI：
10.1016/j.quaint.2014.11.030
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发表时间：
2015-10-14
影响因子：
2.2
通讯作者：
Shi, Fengdeng
中科院分区：
文献类型：
--
作者：
Li, Xiaoyan;Jian, Zhimin;Shi, Fengdeng
利用加速器质谱（AMS）C-14测年模型、沉积物粒度、氧同位素和底栖有孔虫壳体Mg/Ca比值，对东海内陆架泥质区MZ 01孔全新世千年气候变化进行了研究。在此基础上，该核心的多代理，8个突然冷却事件发生在8.2，7.2，6.2，5.1，4.2，3.2，2.3和1.2 ka BP，在修订的年龄模型的不确定性。从岩心重建的突发全新世地表水文事件的时间，特别是8.2 ka，在ECS的内陆架泥区发音表示似乎是一致的记录从北大西洋，南海和邻近的陆地洞穴和格陵兰冰芯，这表明全球气候遥相关。全新世气候突变具有820-830年和350-420年的周期性，这可能与太阳活动有关，但也反映了热带西太平洋水文变化的强烈区域性特征。我们的结论是，负责这些突发事件的模式和周期性的特殊水文模式和机制的奇异性值得进一步研究更密集的定年控制和新的代理重建。(C)2014 Elsevier Ltd和INQUA。All rights reserved.
Core MZ01 from the mud area on the inner shelf of the East China Sea (ECS) was studied to detect millennial climate changes during the Holocene based on a modified version of accelerator mass spectrometry (AMS) C-14 dating age model, sediment grain size, oxygen isotopes and the Mg/Ca ratio of benthic foraminifera shells. On the basis of multiproxies of this core, eight abrupt cooling events were identified that occurred at 8.2, 7.2, 6.2, 5.1, 4.2, 3.2, 2.3 and 1.2 ka BP, within the uncertainties of the revised age model. The timing of the abrupt Holocene surface hydrographic events reconstructed from the core, particularly 8.2 ka, expressed pronouncedly in the mud area on the inner shelf of the ECS appear to be coincident with the records from the North Atlantic, the South China Sea and an adjacent land cave and Greenland ice cores, suggesting global climatic teleconnections. The abrupt climate changes during the Holocene displays periodicities of 820-830 years and 350-420 years, which may be related to solar activity but suggests a robust regional feature of hydrographic changes in the western tropical Pacific. We conclude that the singularity of the particular hydrographic patterns and mechanisms responsible for the patterns and periodicities of these abrupt events merits further studies by more intensive dating controls and novel proxy reconstructions. (C) 2014 Elsevier Ltd and INQUA. All rights reserved.