Changes in solar activity and Holocene climatic shifts derived from 14C wiggle-match dated peat deposits
Changes in solar activity and Holocene climatic shifts derived from 14C wiggle-match dated peat deposits
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源自 14C 摆动匹配测年泥炭沉积物的太阳活动变化和全新世气候变化
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. van der Plicht
中科院分区：
文献类型：
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作者：
D. Mauquoy;B. van Geel;M. Blaauw;A. Speranza;J. van der Plicht
加速器质谱仪 (AMS) 14C 泥炭沉积物日期的紧密排列序列显示了世纪范围内的波动，可以拟合放射性碳校准曲线。通过摆动匹配这些序列，可以生成高精度的日历年龄年表，显示青铜时代/铁器时代过渡（约公元前 850 年）和“小冰河时代”（沃尔夫、斯波雷尔、蒙德和道尔顿极小值）期间泥沼表面湿度的变化发生在大气浓度突然增加到 14°C 的时期。来自欧洲西北部基于泥炭的代理气候指标的重复证据表明，这些气候变化可能是由太阳活动的暂时减弱造成的。英国和丹麦两个高地泥炭沼泽的碳积累率在“小冰河时代”期间录得较低值，这反映出在这些气候恶化时期泥炭形成植被的初级生产力下降。
Closely spaced sequences of accelerator mass spectrometer (AMS) 14C dates of peat deposits display century-scale wiggles which can be fitted to the radiocarbon calibration curve. By wiggle-matching such sequences, high-precision calendar age chronologies can be generated which show that changes in mire surface wetness during the Bronze Age/Iron Age transition (c. 850 cal. BC) and the ‘Little Ice Age’ (Wolf, Spörer, Maunder and Dalton Minima) occurred during periods of suddenly increasing atmospheric concentration of 14C. Replicate evidence from peat-based proxy climate indicators in northwest Europe suggest these changes in climate may have been driven by temporary declines of solar activity. Carbon-accumulation rates of two raised peat bogs in the UK and Denmark record low values during the ‘Little Ice Age’ which reflects reduced primary productivity of the peat-forming vegetation during these periods of climatic deterioration.