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The Properties of Annually Laminated Stalagmites‐A Global Synthesis
Reviews of Geophysics ( IF 25.2 ) Pub Date : 2021-03-03 , DOI: 10.1029/2020rg000722
Andy Baker 1, 2 , Gregoire Mariethoz 3 , Laia Comas‐Bru 4 , Andreas Hartmann 1, 5 , Silvia Frisia 6 , Andrea Borsato 6 , Pauline C. Treble 1, 2 , Asfawossen Asrat 7
Affiliation  

Annually laminated speleothems have the potential to provide information on high‐frequency climate variability and, simultaneously, provide good chronological constraints. However, there are distinct types of speleothem annual laminae, from physical to chemical, and a common mechanism that links their formation has yet to be found. Here, we analyzed annually laminated stalagmites from 23 caves and 6 continents with the aim to find if there are common mechanisms underlying their development. Annually laminated stalagmites are least common in arid and semiarid climates, and most common in regions with a seasonality of precipitation. At a global scale, we observe faster growth rates with increasing mean annual temperature and decreasing latitude. Changepoints in average growth rates are infrequent and age‐depth relationships demonstrate that growth rates can be approximated to be constant. In general, annually laminated stalagmites are characterized by centennial‐scale stability in calcite precipitation due to a sufficiently large and well‐mixed water source, a time series spectrum showing first‐order autoregression due to mixing of stored water and annual recharged water, and an inter‐annual flickering of growth acceleration, bringing growth rates back to the long‐term mean. Climate forcing of growth rate variations is observed where a multi‐year climate signal is strong enough to be the dominant control on calcite growth rate variability, such that it retains a climate imprint after smoothing of this signal by mixing of stored water. In contrast, long‐term constant growth rate of laminated stalagmites adds further robustness to their unparalleled capacity to improve accuracy of chronology building.

中文翻译:

年度层合石笋的性质-全球综合

每年叠层的鞘翅目有潜力提供有关高频气候变异性的信息,同时提供良好的时序约束。然而,从物理的到化学的,千变万化的每年薄片都有不同的类型,并且尚未找到将它们的形成联系起来的共同机制。在这里,我们分析了每年来自23个洞穴和6个大陆的层状石笋,目的是寻找是否存在共同的机制来发展它们。在干旱和半干旱气候下,每年叠层的石笋最不常见,而在季节性降水的地区则最常见。在全球范围内,随着年平均温度升高和纬度降低,我们观察到更快的增长率。平均增长率的变化点很少,年龄与年龄的关系表明,增长率可以近似地保持恒定。总的来说,每年叠层的石笋的特征是由于足够大和充分混合的水源,方解石沉淀具有百年尺度的稳定性,时间序列频谱显示了由于储水和年补给水的混合而产生的一阶自回归,以及年度加速增长的闪烁,使增长率回到长期平均值。在多年的气候信号强度足以控制方解石生长速率变异性的情况下,观察到了气候变化对强迫速率的强迫作用,因此在通过混合存储水使信号平滑后,它仍保留了气候印记。相比之下,
更新日期:2021-04-19
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