A detection of Milankovitch frequencies in global volcanic activity
A detection of Milankovitch frequencies in global volcanic activity
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DOI：
10.1130/g33419.1
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发表时间：
2013-02-01
期刊：
影响因子：
5.8
通讯作者：
Huybers, Peter J.
中科院分区：
文献类型：
--
作者：
Kutterolf, Steffen;Jegen, Marion;Huybers, Peter J.
在整个更新世 - 全新世冰河时代的火山活动输出中，对米兰科维奇周期的严格检测一直难以实现。我们对太平洋火环沿线海洋沉积物中记录的大量保存完好的火山灰羽流沉积物进行了频谱分析。我们的分析在黄赤交角周期上得出了具有统计学意义的频谱峰值检测结果。我们提出，火山活动的这种变化性是由与冰河时代质量重新分布相关的地壳应力变化导致的。特别是，火山活动增加滞后于海平面上升速率最高值（全球冰量减少）4.0 ± 3.6千年，并且与火山活动地点应力变化的数值预测相关。这些结果支持冰河时代气候、大陆应力场和火山活动变化之间存在因果联系。
A rigorous detection of Milankovitch periodicities in volcanic output across the Pleistocene-Holocene ice age has remained elusive. We report on a spectral analysis of a large number of well-preserved ash plume deposits recorded in marine sediments along the Pacific Ring of Fire. Our analysis yields a statistically significant detection of a spectral peak at the obliquity period. We propose that this variability in volcanic activity results from crustal stress changes associated with ice age mass redistribution. In particular, increased volcanism lags behind the highest rate of increasing eustatic sea level (decreasing global ice volume) by 4.0 +/- 3.6 k.y. and correlates with numerical predictions of stress changes at volcanically active sites. These results support the presence of a causal link between variations in ice age climate, continental stress field, and volcanism.