Estimates of plume height from infrasound for regional volcano monitoring
Estimates of plume height from infrasound for regional volcano monitoring
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DOI：
10.1016/j.jvolgeores.2020.106997
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发表时间：
2020-09-15
影响因子：
2.9
通讯作者：
Williams, Ross Adrian
中科院分区：
文献类型：
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作者：
Perttu, Anna;Taisne, Benoit;Williams, Ross Adrian
目前在火山监测方面的努力，特别是在东南亚，依赖于当地数据（通常在距离火山不到100公里的地方收集）和卫星遥感的结合。虽然这种结合有其优点，但使用地面遥感数据，如远距离次声测量，仍有一些缺点可以帮助减轻。次声提供了探测和表征火山羽流的工具，不受云层覆盖和一天中的时间的影响。较大的火山喷发产生的次声与羽流有关，在监测的背景下为火山喷发动力学提供了独特的视角。过去的研究表明，次声可以用来估计震源参数，比如火山喷发时物质从火山口喷出的速度；这些是经验和数值模型的关键输入参数，用于估计火山羽流的高度、大气中的火山灰运输和扩散。在这里，我们演示了使用远程次声来估计火山羽流的高度，包括对2014年5月30日印度尼西亚Sangeang Api火山羽流的案例研究。我们利用从2000年到距离火山5000多公里处收集的次声，确定了火山柱的高度。在2020年1月菲律宾塔尔火山爆发期间，该方法应用于东部1650公里处的远程次声记录。我们表明，我们的工作流程可以在接近实时的情况下实施，提供了一个有效的工具，用于快速测量羽流高度，包括相关的不确定性，当火山云从地面或空间不可见时。(C) 2020作者。Elsevier B.V.出版
Present efforts in volcano monitoring, particularly in Southeast Asia, rely on the combination of local data (generally gathered at less than 100 km from the volcano), and satellite remote sensing. While this combination has its strengths, there are still weaknesses that the use of ground-based remote sensing data such as distant infrasound measurements could help alleviate. Infrasound offers tools for detecting and characterizing volcanic plumes independent of cloud cover and time of day. Larger volcanic eruptions generate infrasound that is related to the plume and offers a unique view into eruption dynamics within the context of monitoring. Past research has demonstrated that infrasound can be used to estimate source parameters, such as the rate at which material is ejected from volcanic vents during eruptions; these are key input parameters into empirical and numerical models to estimate the height of volcanic plumes, atmospheric ash transport and dispersion. Here, we demonstrate the use of remote infrasound in estimating the height of volcanic plumes, including a case study on the May 30, 2014 plume from the volcano Sangeang Api in Indonesia. We were able to determine the plume height using infrasound gathered from 2000 to over 5000 km distance from the volcano. During the January 2020 eruption of Taal volcano in the Philippines, this method was applied to remote infrasound recorded 1650 km to the east. We show that our workflow can be implemented in near real-time, offering an effective tool for rapid plume height measurement, including associated uncertainties, when volcanic clouds are not visible from the ground or space. (C) 2020 The Authors. Published by Elsevier B.V.