Thermal, Deformation, and Degassing Remote Sensing Time Series (CE 2000–2017) at the 47 most Active Volcanoes in Latin America: Implications for Volcanic Systems
Thermal, Deformation, and Degassing Remote Sensing Time Series (CE 2000–2017) at the 47 most Active Volcanoes in Latin America: Implications for Volcanic Systems
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DOI：
10.1029/2018jb016199
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发表时间：
2019-01
期刊：
影响因子：
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通讯作者：
K. Reath;M. Pritchard;M. Poland;F. Delgado;S. Carn;D. Coppola;B. Andrews;S. Ebmeier;E. Rumpf;S. Henderson;S. Baker;P. Lundgren;Rosalind J Wright;J. Biggs;T. Lopez;C. Wauthier;S. Moruzzi;A. Alcott;R. Wessels;J. Griswold;S. Ogburn;S. Loughlin;F. Meyer;G. Vaughan;M. Bagnardi
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文献类型：
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作者：
K. Reath;M. Pritchard;M. Poland;F. Delgado;S. Carn;D. Coppola;B. Andrews;S. Ebmeier;E. Rumpf;S. Henderson;S. Baker;P. Lundgren;Rosalind J Wright;J. Biggs;T. Lopez;C. Wauthier;S. Moruzzi;A. Alcott;R. Wessels;J. Griswold;S. Ogburn;S. Loughlin;F. Meyer;G. Vaughan;M. Bagnardi
火山对当地和全球人口都有害，但只有一小部分火山受到地面传感器的持续监测。例如，在拉丁美洲，超过 60% 的全新世火山不受监测，这意味着火山活动的长期多参数数据集稀少且稀疏。我们使用卫星对拉丁美洲 47 座最活跃火山 17 年来的脱气、热异常和地表变形进行观测，并将这些数据集与全球火山计划存档的地面观测数据进行比较。这是区域范围内多卫星时间序列的首次比较，提供了有关非喷发期、喷发前、协同喷发和喷发后时期火山行为的信息。例如，在科帕韦火山，所有三种类型的卫星测量结果与背景活动的偏差在 2012 年重新喷发活动之前数月至数年就已显现出来。通过量化每座火山测量到的脱气量、热输出和变形量，我们测试了这些火山作为开放或封闭火山系统的分类。我们发现约 28% 的火山不属于任何一种分类，其余的则显示出两种类型的元素，展示了随时间变化的动态范围的行为。最后，我们建议如何通过更好地协调现有的卫星能力和新仪器来改进火山监测。
Volcanoes are hazardous to local and global populations, but only a fraction are continuously monitored by ground‐based sensors. For example, in Latin America, more than 60% of Holocene volcanoes are unmonitored, meaning long‐term multiparameter data sets of volcanic activity are rare and sparse. We use satellite observations of degassing, thermal anomalies, and surface deformation spanning 17 years at 47 of the most active volcanoes in Latin America and compare these data sets to ground‐based observations archived by the Global Volcanism Program. This first comparison of multisatellite time series on a regional scale provides information regarding volcanic behavior during, noneruptive, pre‐eruptive, syneruptive, and posteruptive periods. For example, at Copahue volcano, deviations from background activity in all three types of satellite measurements were manifested months to years in advance of renewed eruptive activity in 2012. By quantifying the amount of degassing, thermal output, and deformation measured at each of these volcanoes, we test the classification of these volcanoes as open or closed volcanic systems. We find that ~28% of the volcanoes do not fall into either classification, and the rest show elements of both, demonstrating a dynamic range of behavior that can change over time. Finally, we recommend how volcano monitoring could be improved through better coordination of available satellite‐based capabilities and new instruments.