Margins: Workshop on Modeling of Subduction Zone Dynamics and Thermal Structure

俯冲带的理论模拟是观测和实验方法的重要补充，也是检验会聚边缘动力学概念模型的基本工具。尽管在数值技术和不断增加的计算能力的巨大进步，主要的障碍存在于道路上的精确和一致的建模完全集成到俯冲带的研究。关于俯冲开始和演化的动力学控制仍然存在很大的不确定性。这在一定程度上是由于必须对板块和地幔楔的流变学和成分以及孕震区和覆盖板块的动力学做出重要假设。此外，我们缺乏系统的调查各种数值技术或严格的解决方案测试的影响。最近发表的结果的概述表明，我们对俯冲带的热结构的理解仍然存在很大的差异。建模社区的主要任务是基准和评估现有的数值方法，以指导使用不断增加的计算机能力和改进的数值技术，并进一步将数值建模纳入实验和观测研究。在密歇根大学安阿伯举行的一个重点突出的技术研讨会解决了这些问题。研讨会的形式是合作和动手，观众包括俯冲带建模者，来自观测和实验学科的专家，以及一些研究生。为了最大限度地提高讨论，研讨会限制在25名参与者，并有有限的时间分配给正式演讲。研讨会的目标包括：1）标准案例的数字基准;2）技术改进和限制的概述;3）控制板楔环境动态的基本参数的调查;4）一套用于更广泛社区的基础模型;5）专业之间的信息交流和知识转移;6）加强合作，包括代码和资源共享。

Theoretical modeling of subduction zone provides an essential complement to observational and experimental approaches and a fundamental tool to test conceptual models of the dynamics of convergent margins. Despite large advances in numerical techniques and increasing computational capacity, major obstacles exist in the road to full integration of accurate and consistent modeling into subduction zone research. Large uncertainties about the dynamical controls on subduction initiation and evolution remain. This is in part due to important assumptions that have to be made about the rheology and composition of the slab and mantle wedge, and the dynamics of the seismogenic zone and overriding plate. In addition, we lack a systematic investigation into the influence of various numerical techniques or rigorous solution tests. An overview of recently published results shows that large discrepancies remain in our understanding of the thermal structure of subduction zones. Major tasks for the modeling community are to benchmark and evaluate existing numerical approaches, to guide the use of increasing computer power and improving numerical techniques, and to further the integration of numerical modeling into experimental and observational studies. A focused, technical workshop held at the University of Michigan in Ann Arbor, MI addresses these issues. The workshop format is collaborative and hands-on, with an audience consisting of subduction zone modelers, experts from observational and experimental disciplines, and a number of graduate students.To maximize discussion, the workshop is limited to 25 participants and has limited time allocated to formal presentations. The goals of the workshop include:1) a numerical benchmark of standard cases;2) an overview of technical improvements and limitations;3) a survey of the parameters that are fundamental in controlling the dynamics of the slab-wedge environment;4) a set of base models for use in the wider community;5) information exchange and knowledge transfer between specialties;6) increased collaboration, including code and resource sharing.