Workshop on coupling of tectonic and surface processes across spatio-temporal scales

跨时空尺度构造与地表过程耦合研讨会

• 批准号: 1746021
• 负责人: Luc Lavier
• 金额: $ 9.52万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1746021&HistoricalAwards=false
• 关键词: Workshop; coupling; tectonic; surface; processes

The discovery of feedbacks between geomorphic and tectonic processes has revolutionized the understanding of the mechanics of mountain building and of the interactions between landscapes and climate. While the basics are established, the details of coupling remain debated. Separating the effects of climate and erosion from the effect of tectonics in the geological record remains a challenge. One approach to study these interactions are computer models that couple surface and tectonic processes in order to quantify the effects of a wide range of geologic and geomorphic parameters. This allows testing hypotheses derived from field observations and to develop new surface process-tectonics hypotheses. This project supports a workshop that gathers leading U.S. and international geoscientists who use and develop long-term tectonic and landscape evolution models to discuss numerical techniques that have the potential of revolutionizing the understanding of the interactions between surface processes and tectonics, as well as solve some of the most difficult technical challenges for developing models that require coupling over highly disparate spatial and temporal scales. The workshop advances desired societal outcomes by participation of women and underrepresented minorities and development of a diverse, globally competitive STEM workforce through engagement of early career scientists, post-doctoral scholars, and students in the workshop.This project supports the participation of U.S. and international scientists in a workshop, which will be held in 2018 at the University of Texas at Austin. The first goal of the workshop is to work to develop the next generation of coupled surface processes and long-term tectonic models to explore key questions linking tectonics, climate, and landscape evolution. This will require defining the numerical techniques used by the two communities and identifying the challenges in coupling across different temporal and spatial scales. The second goal is to strengthen the U.S. long-term tectonics modeling community and build new links/collaborations between the long-term tectonics community at NSF-supported Computational Infrastructure for Geodynamics and the surface processes community at NSF-supported Community Surface Dynamics Modeling System. Bringing together the two communities will do more than just facilitate code development; each community can help the other with the science by bringing new perspective to existing questions and ideas. The workshop participants will discuss specific, immediate questions for surface process and lithospheric deformation codes, including: (1) the role of topography and topographic stresses; (2) physically based erosion laws rather than diffusion based; (3) Inclusion of the seismic cycle in tectonic models; (4) inclusion of the seismic cycle in landscape evolution models; (5) the importance of 3D heterogeneity in material properties in both geodynamic and geomorphologic modelling; and (6) incorporation of atmosphere as a third component to models.

地貌和构造过程之间反馈的发现彻底改变了对造山机制和景观与气候之间相互作用的理解。虽然基本原理已经确立，但耦合的细节仍然存在争议。在地质记录中，将气候和侵蚀的影响与构造的影响区分开来仍然是一个挑战。研究这些相互作用的一种方法是将地表和构造过程耦合在一起的计算机模型，以便量化各种地质和地貌参数的影响。这允许测试从实地观察得出的假设，并发展新的地表过程构造假设。该项目支持一个研讨会，该研讨会聚集了美国和国际领先的地球科学家，他们使用和开发长期构造和景观演化模型，讨论有可能彻底改变对地表过程和构造之间相互作用的理解的数值技术，并解决一些最困难的技术挑战，因为开发模型需要在高度不同的空间和时间尺度上进行耦合。研讨会通过女性和代表性不足的少数族裔的参与，以及通过早期职业科学家、博士后学者和学生的参与，发展一支多元化、具有全球竞争力的STEM劳动力队伍，推动了预期的社会成果。该项目支持美国和国际科学家参加一个研讨会，该研讨会将于2018年在德克萨斯大学奥斯汀分校举行。研讨会的第一个目标是开发下一代耦合地表过程和长期构造模型，以探索连接构造，气候和景观演化的关键问题。这将需要确定两个群落使用的数值技术，并确定跨不同时空尺度耦合的挑战。第二个目标是加强美国长期构造建模社区，并在美国国家科学基金会支持的地球动力学计算基础设施的长期构造社区和美国国家科学基金会支持的社区表面动力学建模系统的地表过程社区之间建立新的联系/合作。将两个社区结合在一起将不仅仅是促进代码开发；每个社区都可以通过为现有问题和想法带来新的视角来帮助对方进行科学研究。研讨会参与者将讨论地表过程和岩石圈变形规范的具体、直接问题，包括：(1)地形和地形应力的作用；(2)基于物理而非扩散的侵蚀规律；(3)将地震旋回纳入构造模型；(4)将地震旋回纳入景观演化模型；(5)材料性质的三维非均质性在地球动力学和地貌建模中的重要性；(6)将大气作为模式的第三分量。