Improved Dissemination of Global Crustal Model CRUST1.0

改进全球地壳模型 CRUST1.0 的传播

• 批准号: 1415763
• 负责人: Gabriele Laske
• 金额: $ 16.5万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 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: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1415763&HistoricalAwards=false
• 关键词: Improved; Dissemination; Global; Crustal; Model

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.

地壳（地壳）的最外层包括一个关键区域，该区域参与并控制地球深内部和大气中的过程。地壳岩石的变化会影响地球的磁场和重力。因此，对于了解广泛的应用，包括改进地球地幔的地震成像，了解地球地形和地球动力学的原因，定义地球壳的化学构成以及将这些材料回收到地幔中通过板构造，以及最终理解与地球的杂物的互动和互动。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，地壳模型主要是由学术研究人员及其学生使用的，它们通常位于大学或研究机构。但是现在，非大学地点的流量越来越大，该行业的兴趣越来越大。越来越多的用户似乎依靠各种计算机程序来阅读和使用该模型。为了响应要求，将提供基于网络的支持。同时，通过对现场收集的数据进行仔细测试并在必要时进行修改，从而不断改进该模型。这项赠款资助了通过改进的计算机工具来促进不断发展的模型的努力，以读取和可视化模型。GlobalCrustal Model Crust1.0在今年早些时候将其发布给了社区，此前几年来编译和更新了积极的和被动的地震数据库，并在地壳结构上进行了抗corlake层，并针对表面波数据验证了最初的模型验证。这个备受期待的模型取代了Crust2.0，在一个多样化的跨学科社区中，它已成为“基准地壳模型”已有十多年了。 Crust2.0最初是在整个层状层析成像研究中应用地壳校正的，在学术界的时代和地区，Fortran计算机代码是最广泛使用和理解的工具。 CRUST1.0具有更简单的新文件结构，并且提供了类似的Fortran代码以解开模型。但是，由于其作为开源模型的短暂存在，因此请求一直在不知所措，以提供更现代和“用户友好”的工具来与Crust1.0合作。该赠款有助于设计和提供此类工具。同时，将在通过验证过程之后响应用户反馈以改进外壳1.0。在拟议的工作的第1阶段中，将响应用户请求以各种文件格式提供模型，包括XYZ文件，二进制GRD文件和ArcGIS文件。将为Crust1.0开发阅读和可视化工具，用于各种平台，例如C-Shell脚本，Python，Matlab，GMT和ArcGIS。通过提供拟议的工具，Crust1.0将比Croust2.0拥有的范围更大。在第2阶段，将使用现有的地壳数据库进行增强的模型验证。在此阶段的工作将用于雇用和教育本科生。在第3阶段，将迭代合并用户反馈以及表面波的新约束。预计Crust1.0的更新将与主动地震和被动地震数据集具有改善的一致性。