Improved Dissemination of Global Crustal Model CRUST1.0
改进全球地壳模型 CRUST1.0 的传播
基本信息
- 批准号:1415763
- 负责人:
- 金额:$ 16.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2014
- 资助国家:美国
- 起止时间:2014-08-01 至 2017-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Earth's outermost layer, the crust, comprises a critical zone that participates in and controls processes of Earth's deep interior as well as in the atmosphere. Variations in crustal rocks influence Earth's magnetic field as well as gravity. A good model of Earth's crust is therefore essential to understand a wide range of applications including improved seismic imaging of Earth's mantle, understanding the causes of Earth's topography and Earth dynamics, defining the chemical make-up of Earth's crust and the recycling of these materials into the mantle through plate tectonics, and ultimately understanding the linkage and interaction of Earth's crust with its atmosphere processes. Last year, the PI released CRUST1.0, a global model that is based on a large new database of seismic data. In the past, the crustal models were used primarily by academic investigators and their students, who are typically located at universities or research institutions. But now there is an increasing traffic from non-university locations, with an increasing interest from the industry. A growing fraction of users appears to rely on a diverse set of computer programs to read and work with the model. To respond the demands a web-based support will be provided. At the same time, the model will be continuously improved by carefully testing it against data collected in the field and making modifications when necessary. This grant funds efforts to facilitate a wider circulation of the evolving model through improved computer tools to read and visualize the model.Global crustal model CRUST1.0 saw its release to the community earlier this year, after several years of compiling and updating active and passive seismic databases on crustal structure, and initial model validation against surface wave data. This highly anticipated model replaces CRUST2.0 which has served as the "benchmark crustal model" for over ten years in a diverse, interdisciplinary community. CRUST2.0 was originally compiled to apply crustal corrections in whole-mantle tomographic studies, in an era and area of academia where Fortran computer code was the most widely used and understood tool to work with. CRUST1.0 has a simpler, new file structure, and similar Fortran codes are provided to un-pack the model. However, since its short existence as an open-source model, requests have been overwhelming to provide more modern and "user-friendly" tools to work with CRUST1.0. This grant helps design and provide such tools. At the same time, user feedback will be responded to improve CRUST1.0 following a through validation process. During Phase 1 of the proposed work, user requests will be responded to provide the model in various file formats, including xyz files, binary grd files and ArcGIS files. Reading and visualization tools will be developed for CRUST1.0 for a variety of platforms such as c-shell scripts, Python, Matlab, GMT and ArcGIS. By providing the proposed tools, CRUST1.0 will have a much wider reach than CRUST2.0 ever had. During Phase 2, enhanced model validation will be performed using existing crustal databases. Work during this phase will be used to employ and educate undergraduate students. During Phase 3, user feedback as well as new constraints from surface waves will be iteratively incorporated. The release of an update of CRUST1.0 is anticipated that will have an improved consistency with active seismic as well as passive seismic datasets.
地球的最外层,即地壳,是一个参与并控制地球内部深处以及大气层过程的关键区域。地壳岩石的变化影响地球的磁场和重力。因此,一个好的地壳模型对于了解广泛的应用至关重要,包括改进地幔的地震成像、了解地球地形和地球动力学的原因、定义地壳的化学组成以及通过板块构造将这些材料循环到地幔中,并最终了解地壳与其大气过程的联系和相互作用。去年,PI 发布了 CRUST1.0,这是一个基于大型新地震数据数据库的全球模型。过去,地壳模型主要由学术研究人员及其学生使用,他们通常位于大学或研究机构。但现在来自非大学地点的流量不断增加,业界的兴趣也越来越大。越来越多的用户似乎依赖于不同的计算机程序来阅读和使用模型。为了响应需求,将提供基于网络的支持。同时,该模型将根据现场收集的数据仔细测试并在必要时进行修改,不断改进该模型。这笔赠款资助了通过改进计算机工具来读取和可视化模型,以促进不断发展的模型更广泛的流通。全球地壳模型 CRUST1.0 在经过几年的编译和更新地壳结构主动和被动地震数据库以及针对表面波数据的初始模型验证之后,于今年早些时候向社区发布。这个备受期待的模型取代了 CRUST2.0,十多年来,CRUST2.0 一直在多元化、跨学科的社区中充当“基准地壳模型”。 CRUST2.0 最初是为了在全地幔层析成像研究中应用地壳校正而编译的,在 Fortran 计算机代码是最广泛使用和理解的工具的学术界时代和领域。 CRUST1.0具有更简单的新文件结构,并提供类似的Fortran代码来解包模型。然而,由于它作为开源模型存在的时间很短,因此对于提供更现代和“用户友好”的工具来与 CRUST1.0 一起使用的需求已经势不可挡。这笔赠款有助于设计和提供此类工具。同时,将响应用户反馈,通过验证流程改进 CRUST1.0。在拟议工作的第一阶段,将响应用户请求以提供各种文件格式的模型,包括 xyz 文件、二进制 grd 文件和 ArcGIS 文件。将为 CRUST1.0 开发适用于多种平台的读取和可视化工具,例如 c-shell 脚本、Python、Matlab、GMT 和 ArcGIS。通过提供建议的工具,CRUST1.0 将比 CRUST2.0 具有更广泛的影响范围。在第二阶段,将使用现有的地壳数据库进行增强的模型验证。这一阶段的工作将用于雇用和教育本科生。在第三阶段,用户反馈以及来自表面波的新约束将被迭代地纳入。预计 CRUST1.0 更新的发布将提高与主动地震和被动地震数据集的一致性。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Gabriele Laske其他文献
Gabriele Laske的其他文献
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{{ truncateString('Gabriele Laske', 18)}}的其他基金
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