Collaborative Research: General Purpose Tool for Acoustic Remote Sensing and Mapping of Hydrothermal Flow

合作研究：声学遥感和热液流绘图通用工具

• 批准号: 0136644
• 负责人: Peter Rona
• 金额: $ 4.92万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-04-15 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0136644&HistoricalAwards=false
• 关键词: Collaborative; Research; General; Purpose; Tool

Proposal - 0136768 0136644The goal of this proposal is to develop and fabricate an acoustic remote sensing and mapping tool dedicated to studying hydrothermal flow at the seafloor. The new system will be deployable on a variety of ROVs, deep towed platforms, and stationary seafloor observatory networks for the study and detection of high and low temperature hydrothermal flow regimes. The sensor will implement two new acoustic methods that will enable detection and quantitative mapping of diffuse hydrothermal flow at the seafloor using acoustic scintillation thermography (AST) and volumetric studies of plume particle distributions and flow above the seafloor. These methods have been demonstrated using a commercial sonar system mounted on the ROV Jason during three previous experiments. The proposed sensor will improve upon the operational and technical limitations of the commercial system and enable long time scale experiments and larger-scale surveys using a variety of platforms. In addition, the sensor proposed will enable high quality scientific data collection and analysis thus providing a flexible test bed for new acoustic methods and applications of remote sensing to hydrothermal flow. The system will be compatible with available and proposed seafloor observatories, enabling interactive operation via the Internet.This proposal is the product of an ongoing collaboration between groups at Rutgers (Rona et al.) and the Applied Physics Laboratory of the University of Washington (APL-UW, Jones et al.) and arises from our experience in using commercial sonars for hydrothermal observations. The proposed instrumentation development is central to the goal of the PIs to observe focused and diffuse hydrothermal flow over long time periods. Design, fabrication, and local testing will be the responsibility of APL-UW whereas, the Rutgers group will contribute to the process of developing system specifications from scientific measurement requirements and will conduct the field tests, including analysis of test data.The new remote sensing tool will enable measurements of plume flow variability at long time scales (of order 1 year). Such scales are important in studies on the response of hydrothermal flow regimes to tidal forcing as well as to volcanic and tectonic events. The sensor will enable the implementation of new acoustic detection and mapping techniques for characterizing diffuse flow over large regions (10s of km2) of interest. It is proposed that this instrument will also enable studies of net heat flux from hydrothermal systems and its relation to geophysical, oceanographic, and biological processes.

本提案的目标是开发和制造一个声学遥感和测绘工具，专门用于研究海底热液流动。新系统将部署在各种rov、深海拖曳平台和固定海底观测网上，用于研究和探测高温和低温热液流动状态。该传感器将采用两种新的声学方法，利用声闪烁热成像（AST）和羽流颗粒分布和海底上方流动的体积研究，对海底弥漫性热液流动进行探测和定量测绘。在之前的三次实验中，这些方法已经通过安装在ROV Jason上的商用声纳系统进行了验证。拟议的传感器将改进商业系统的操作和技术限制，并能够使用各种平台进行长时间的实验和大规模调查。此外，该传感器将实现高质量的科学数据收集和分析，从而为新的声学方法和遥感热液流应用提供灵活的试验台。该系统将与现有和拟议的海底观测站兼容，可通过互联网进行互动操作。这项提议是罗格斯大学（Rona等人）和华盛顿大学应用物理实验室（APL-UW， Jones等人）正在进行的合作的产物，并源于我们使用商业声呐进行热液观测的经验。提出的仪器开发是pi在长时间内观察集中和弥漫性热液流动目标的核心。设计、制造和本地测试将由APL-UW负责，而罗格斯大学小组将根据科学测量要求参与开发系统规格的过程，并将进行现场测试，包括分析测试数据。新的遥感工具将能够测量长时间尺度（约1年）的羽流变化。这样的尺度对于研究热液流动模式对潮汐强迫以及火山和构造事件的响应是很重要的。该传感器将能够实现新的声学检测和绘图技术，以表征感兴趣的大区域（10平方公里）的漫流。有人建议，该仪器还将使热液系统的净热通量及其与地球物理、海洋学和生物过程的关系的研究成为可能。