Understanding the drivers of volcano deformation through geodetic model verification and validation
Understanding the drivers of volcano deformation through geodetic model verification and validation
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DOI：
10.1007/s00445-023-01687-4
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发表时间：
2023-11
影响因子：
3.5
通讯作者：
Joshua Crozier;L. Karlstrom;Emily Montgomery-Brown;M. Angarita;Valéry Cayol;M. Bato;Taiyi A. Wang;R. Grapenthin;T. Shreve;K. Anderson;A. Astort;Olivier Bodart;Flavio Cannavó;G. Currenti;F. Dabaghi;Brittany A. Erickson;Deepak Garg;M. Head;Adriana Iozzia;Young Cheol Kim;H. Le Mével;Camila Novoa Lizama;Cody Rucker;F. Silverii;Elisa Trasatti;Yan Zhan
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作者：
Joshua Crozier;L. Karlstrom;Emily Montgomery-Brown;M. Angarita;Valéry Cayol;M. Bato;Taiyi A. Wang;R. Grapenthin;T. Shreve;K. Anderson;A. Astort;Olivier Bodart;Flavio Cannavó;G. Currenti;F. Dabaghi;Brittany A. Erickson;Deepak Garg;M. Head;Adriana Iozzia;Young Cheol Kim;H. Le Mével;Camila Novoa Lizama;Cody Rucker;F. Silverii;Elisa Trasatti;Yan Zhan
火山大地测量学经常涉及使用模型来解释观测到的地表变形。使用了各种各样的正演模型，从分析点源到考虑复杂岩浆系统几何形状、地形和材料特性的数值模拟。各种反演方法可以用来将观测到的火山数据与模型联系起来。理想情况下，应通过相互比较来验证前向模型，以检查执行错误并量化所使用的任何近似值引起的错误。此外，应通过用合成和/或真实的数据进行测试来验证正演模型和反演方法，以确定它们在不确定范围内匹配数据和估计参数值的能力。然而，迄今为止，尚未在火山大地测量方面开展全面的核查和验证工作。在这里，我们报告的第一阶段的驱动程序的火山变形（DVD）的练习，旨在建立社区参与，通过基于网络的练习，涉及计算周围的静态弹性位移加压岩浆水库。正演模型的练习开始与一个球形水库在一个均匀的半空间，然后介绍地形，非均匀弹性性能，和球形几何形状。反演练习提供了均匀半空间中球形储层的合成噪声地表位移数据，并评估了储层位置和体积/压力变化估计的一致性。正演模拟和反演的结果存在差异，这突出了不同正演模型的优势和局限性，以及反演方法选择和不确定性量化的重要性。DVD练习的第一阶段作为社区资源，将促进进一步努力制定再现性标准。
Volcano geodesy often involves the use of models to explain observed surface deformation. A variety of forward models are used, from analytical point sources to numerical simulations that consider complex magma system geometries, topography, and material properties. Various inversion methods can then be used to relate observed volcano data to models. Ideally, forward models should be verified through intercomparison, to check for implementation errors and quantify the error induced by any approximations used. Additionally, forward models and inversion methods should be validated through tests with synthetic and/or real data, to determine their ability to match data and estimate parameter values within uncertainty. However, to date, there have not been comprehensive verification and validation efforts in volcano geodesy. Here, we report on the first phase of the Drivers of Volcano Deformation (DVD) exercises, which were designed to build community involvement through web-based exercises involving calculations of static elastic displacement around pressurized magma reservoirs. The forward model exercises begin with a spherical reservoir in a homogeneous half space, then introduce topography, heterogeneous elastic properties, and spheroidal geometries. The inversion exercises provide synthetic noisy surface displacement data for a spherical reservoir in a homogeneous half space and assess consistency in estimates of reservoir location and volume/pressure change. There is variability in the results from both forward modeling and inversions, which highlights the strengths and limitations of different forward models, as well as the importance of inversion method choice and uncertainty quantification. This first phase of the DVD exercises serves as a community resource and will facilitate further efforts to develop standards of reproducibility.