Collaborative Research: ITR: Prototype, High-Performance, Threat-Adaptive, Space Storm Simulation and Forecast Model Supported by a Data Assimilative, Grid Computing Infrastructure

合作研究：ITR：由数据同化、网格计算基础设施支持的原型、高性能、威胁自适应、空间风暴模拟和预测模型

• 批准号: 0325332
• 负责人: Tamas Gombosi
• 金额: --
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0325332&HistoricalAwards=false
• 关键词: Collaborative; Research; ITR; Prototype; Performance

This project involves research on how to improve space weather modeling by incorporating data assimilation and on-demand grid computing capability. The aim is to develop a first principles, physics-based model of the Sun-Earth system with the capability of making complete space plasma simulations, from the Sun's surface to the upper atmosphere of the Earth. The starting point will be an existing coupled modeling system in which a model of the magnetosphere and solar wind is coupled to a model of the inner magnetosphere and an upper atmosphere model. Data assimilation will be based on a Kalman filter approach. Variability in initial conditions that cannot be directly constrained by data will be estimated from ensembles of runs, characterized by a statistical sub-space identification technique, and then modeled by an empirical stochastic model. The stochastic model will be combined with the deterministic model to produce a hybrid model that will then be the basis of the main data assimilative model. The modeling system will be implemented following Open Grid Services Architecture design protocols so that it can be run on a distributed computational grid. One of the goals is to develop an adaptive system that can respond to significant events in the magnetosphere by incorporating additional computational grid resources as required. If successful, this research could lead to better tools for forecasting space weather. In addition, the project includes partnerships with developers of educational tools for formal and informal education to create teaching resources on the topic of space weather for use in K-12 schools and science museums. The project also includes links with teaching faculty at undergraduate institutions so that data and research results can be integrated into courses on space physics.

该项目涉及如何通过纳入数据同化和按需网格计算能力来改进空间天气模拟的研究。其目的是开发一个基本原理的、基于物理的日地系统模型，具有从太阳表面到地球上层大气进行完整空间等离子体模拟的能力。起点将是一个现有的耦合模拟系统，其中一个磁层和太阳风模型与一个内部磁层模型和一个高层大气模型相耦合。数据同化将基于卡尔曼滤波法。不能直接受数据约束的初始条件的可变性将从运行集合中估计，由统计子空间识别技术表征，然后由经验随机模型建模。随机模式将与确定性模式相结合，产生一个混合模式，然后作为主要数据同化模式的基础。该建模系统将遵循开放网格服务体系结构设计协议实现，从而可以在分布式计算网格上运行。其中一个目标是开发一种自适应系统，该系统可以根据需要纳入额外的计算网格资源，从而对磁层中的重大事件作出反应。如果成功，这项研究可能会带来更好的空间天气预报工具。此外，该项目还与正规和非正规教育教育工具的开发商建立了伙伴关系，以创建关于空间气象主题的教学资源，供K-12学校和科学博物馆使用。该项目还包括与本科生机构的教师建立联系，以便将数据和研究成果纳入空间物理课程。