EarthCube GEO Domain Workshop Proposal: Envisioning a Digital Crust for Simulating Continental‐ Scale Subsurface Fluid Flow in Earth System Models

EarthCube GEO 域研讨会提案：设想一个用于模拟大陆的数字地壳

• 批准号: 1251557
• 负责人: Richard Hooper
• 金额: $ 8.47万
• 依托单位: Consortium of Universities for the Advancement of Hydrologic Sci
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1251557&HistoricalAwards=false
• 关键词: EarthCube; GEO; Domain; Workshop; Proposal

In order to advance the understanding of the critical zone and deeper crust and to better couple the exchange of mass and energy between the surface and the subsurface, this project will hold 3-day workshop to develop a long?]term vision of a digital representation of the continental crust of N. America and design concepts for prototype data model(s). The digital catalog of crustal structure, composition and permeability (as well as parameters from which permeability could be inferred) define the mechanisms by which to integrate vast amounts of dcisparate data types and to construct a coherent, 3D picture of subsurface structure and material properties, so that we can begin to represent subsurface fluid flow in Earth system models and elucidate its critical controls in the evolution of the Earth system from the past to the present and the future.Fluid circulation in the subsurface, from the critical zone to the deeper crust, plays an essential role in surface, near-surface, and crustal dynamics. In the critical zone (50m), soil water is a ecologic filter and niche differentiator where energy is abundant, explaining patterns in plant distribution globally and locally; and shallow groundwater is a primary source for rivers, lakes andwetlands in dry seasons and regions, thereby sustaining and modifying land and aquatic ecosystems, influencing water quality, and buffering against droughts and temperature extremes. Deeper in the crust (1km), the large sedimentary formations and fractured rocks hold the fresh?]water aquifers that support major societies in arid and semi-arid regions. In the deeper crust (1km), fluid flow affects diagenesis, hydrocarbons, ore deposits, faulting, earthquakes, and geothermal fields and involves water, gas and hydrocarbon flow. What are the flow paths through the soils and rocks? How fast are the flows and how long are the residence times? And how will they respond to changes in climate and land surface drivers? The answers depend on a quantitative description of the subsurface flow fields, driven by the hydraulic gradient but strongly controlled by the permeability of the Earth?fs material. Creating a digital catalogue by which to reconstruct this poorly sampled region of the planet will enable multiple aspects of the Earth sciences to advance transformatively.

为了促进对关键区域和更深的地壳的理解，并更好地融合了表面和地下之间的质量和能量的交换，该项目将举办为期3天的研讨会，以开发长时间的数字表示N. America的大陆壳和设计概念的原型数据模型的数字表示。 地壳结构，成分和渗透性的数字目录（以及可以推断出渗透性的参数）定义了整合大量DCisparate数据类型的机制从临界区到更深的地壳，在地下中的流量循环在表面，近表面和地壳动力学中起着至关重要的作用。在临界区域（50m）中，土壤水是一种生态过滤器和小众区别，其中能量丰富，在全球范围内和局部解释了植物分布的模式。浅层地下水是干旱季节和地区河流，湖泊和妇女的主要来源，从而维持和修改了土地和水生生态系统，影响水质以及防止干旱和极端温度的缓冲。在外壳（1公里）的深处，大型沉积地层和骨折的岩石容纳了新鲜的？]支持干旱和半干旱地区主要社会的水含水层。在更深的地壳（1公里）中，流体流动会影响成岩，碳氢化合物，矿石沉积，断层，地震和地热场，涉及水，气体和碳氢化合物流量。 通过土壤和岩石的流道是什么？流动速度有多快，住宿时间多长时间？他们将如何应对气候和陆地表面驱动因素的变化？答案取决于对地下流场的定量描述，这是由液压梯度驱动的，但由地球材料的渗透性强烈控制。 创建一个数字目录，通过该目录重建地球的这个采样不佳的区域将使地球科学的多个方面能够转变。