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

俯冲带的理论模拟是对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。尽管在数值技术和计算能力方面取得了很大进展，但在将准确和一致的模拟完全整合到俯冲带研究中的道路上仍然存在主要障碍。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体的流变学和成分以及孕震带和盖层板块的动力学做出重要假设。此外，我们缺乏对各种数值技术或严格的解测试的影响的系统调查。对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。模型界的主要任务是对现有的数值方法进行基准和评价，指导增加计算机能力和改进数值技术的使用，并进一步将数值模拟与实验和观测研究相结合。密歇根大学在密歇根大学密歇根大学安娜堡举办了一次集中的技术研讨会，旨在解决这些问题。研讨会的形式是协作性和实践性的，听众包括俯冲带建模师、观测和实验学科的专家和一些研究生。为了最大限度地进行讨论，研讨会限制为25名参与者，分配给正式演讲的时间有限。讲习班的目标包括：1)标准案例的数字基准；2)技术改进和限制的概述；3)对控制板楔环境动态的基本参数进行调查；4)一套供更广泛社区使用的基本模型；5)专业之间的信息交流和知识转让；6)加强协作，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.