Physical parameterization of Strombolian eruptions via experimentally‐validated modeling of high‐speed observations
Physical parameterization of Strombolian eruptions via experimentally‐validated modeling of high‐speed observations
复制标题
通过高速观测的实验验证模型对斯特龙博利火山喷发进行物理参数化
DOI：
10.1029/2012gl052772
复制
发表时间：
2012
影响因子：
5.2
通讯作者：
D. Rita
中科院分区：
文献类型：
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作者：
J. Taddeucci;M. Alatorre;Monica Moroni;L. Tornetta;A. Capponi;P. Scarlato;Donald Bruce Dingwell;D. Rita
加压气体驱动爆炸性火山喷发。现有的模型可以预测喷发岩浆中气体的数量和压力，但这些模型的应用和测试目前受到自然系统输入参数的准确性的限制。在这里，我们提出了一种新的方法，基于1)高速成像和2)火山活动的激波管模型的新颖集成，以得出驱动非稳态喷发动力学的压力、质量和气体体积的亚秒变化的估计。首先，我们通过实验室规模的激波管实验验证了该方法。验证了该方法后，我们将其应用于对斯特龙博利火山（意大利）喷发的观测。最后，我们将这些结果用于最终输出的输入参数权重的参数化研究。我们得出结论，持续时间为秒的斯特龙堡式爆炸是由质量和压力分别在4-714 kg和0.10-0.56 MPa范围内的气体离散释放造成的，它们占据了4-190 m深的火山导管。这些变化既存在于单个爆炸之间，也存在于单个爆炸内部。
Pressurized gas drives explosive volcanic eruptions. Existing models can predict the amount and pressure of gas in erupting magma, but application and testing of such models is currently limited by the accuracy of input parameters from natural systems. Here, we present a new methodology, based on a novel integration of 1) high‐speed imaging and 2) shock‐tube modeling of volcanic activity in order to derive estimates of sub‐second variations in the pressure, mass, and volume of gas that drive the dynamics of unsteady eruptions. First, we validate the method against laboratory‐scale shock‐tube experiments. Having validated the method we then apply it to observations of eruptions at Stromboli volcano (Italy). Finally, we use those results for a parametric study of the weight of input parameters on final outputs. We conclude that Strombolian explosions, with durations of seconds, result from discrete releases of gas with mass and pressure in the 4–714 kg and 0.10–0.56 MPa range, respectively, and which occupy the volcano conduit to a depth of 4–190 m. These variations are present both among and within individual explosions.
使用多普勒雷达详细观察危地马拉圣地亚哥火山喷发云
影响因子：
--
作者：
Scharff;Ziemen;Johnson
通讯作者：
Johnson