EAGER: Exploratory research in non-Fourier tidal analysis of hydrothermal time series

EAGER：热液时间序列非傅里叶潮汐分析的探索性研究

• 批准号: 0957767
• 负责人: Adam Schultz
• 金额: $ 10.56万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-01 至 2012-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0957767&HistoricalAwards=false
• 关键词: EAGER; Exploratory; research; non; Fourier

This research was funded as an Early Concept Grant for Exploratory Research (EAGER). The work focuses on testing whether earth and ocean tides exert an impact on crustal fluid flow in land and seafloor hydrothermal systems. It uses an unconventional, non-Fourier approach in which forcing functions, derived from the gravitational potentials due to the positioning of the Earth, Sun, and Moon, are used as forcing functions, as opposed to the standard Fourier time series approach that is usually used. Modeling software will be developed that builds off the Admiralty Method time-series approach that uses a pseudo-sinusoidal function whose time-varying amplitude and phase are modulated by the relative positions of the planets. The model will be tested with chemical and temperature data from well characterized hydrothermal systems on land (Iceland and Yellowstone) and on the seafloor (sites on the Endeavour segment of the Juan de Fuca Ridge and on the Mid-Atlantic Ridge). Broader impacts of the work include applicability to the geothermal industry and to the NSF-funded Ridge 2000 program which includes the modeling of fluid exchange between the Earth's mantle and ocean via seafloor hydrothermal vents. Data products and software will be made available in publications and on the Internet.

这项研究是作为探索性研究的早期概念资助（EAGER）。 这项工作的重点是测试地球和海洋潮汐是否对陆地和海底热液系统中的地壳流体流动产生影响。 它使用了一种非传统的非傅立叶方法，其中强迫函数，来自地球，太阳和月球的定位引起的引力势，被用作强迫函数，而不是通常使用的标准傅立叶时间序列方法。 将开发建模软件，该软件建立在海军部方法时间序列方法的基础上，该方法使用伪正弦函数，其时变幅度和相位由行星的相对位置调制。 将用陆地（冰岛和黄石）和海底（胡安·德富卡海脊奋进段和大西洋中脊的地点）上特征明确的热液系统的化学和温度数据对该模型进行测试。 这项工作的更广泛影响包括适用于地热工业和NSF资助的Ridge 2000计划，其中包括通过海底热液喷口模拟地幔和海洋之间的流体交换。 将通过出版物和因特网提供数据产品和软件。