Collaborative Research: Dynamics of eruptive plumes above a submarine arc volcano

合作研究：海底弧火山上方喷发羽流的动力学

• 批准号: 1232431
• 负责人: Joseph Resing
• 金额: $ 3.14万
• 依托单位: University of Washington
• 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 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1232431&HistoricalAwards=false
• 关键词: Collaborative; Research; Dynamics; eruptive; plumes

The ability to maximize usage and develop new tools for exploring the ocean, in particular the behavior and features that occur within the water column is important both for US oceanographic research capacity as well as increasing the effectiveness of investment in sea-going platforms and infrastructure. This research explores the possibility of expanding the capability of multi-beam sonar systems recently installed on some ships in the University National Oceanographic Laboratory System (UNOLS) fleet. The research will consist of analyzing mid-water sonar soundings serendipitiously collected on a cruise of exploration to Rota 1, an actively erupting undersea volcano in the western Pacific Ocean, while investigators were studying the eruption dynamics and volcanological deposits from the volcano. During the cruise, it became evident that the new sonar ws able to inage volcanic gasses that were emmanating from the eruption and being expressed as trains of bubbles coming from the volcanic vent. Research will include examination and processing of the new sonar data to try and extract eruption plume height, intensity, and direction as well as how these change with time. It will also compare the mid-water plume results to visual and chemical data collected for purposes of the originally funded project so that the results can be calibrated with complementary physical measurements taken by remotely controlled submarine vehicles that were simultaneously operating in the area. A major goal of this newly funded work will be to gauge the usefulness of mid-water multibeam bubble train datasets and find out what can be learned from these data in terms of understanding undesea volcanic activity. If successful, the same techniques could be applied to better understand low temperature seeps on continental margins and bubble trains associated with marine gas hydrate deposits. Broader impacts of the work include the development of new infrastructure for science by developing a new mid-water imaging capability for multi-beam sonar on UNOLS ships and graduate student training.

最大限度地利用和开发新的海洋探索工具的能力，特别是发生在水柱内的行为和特征，对于美国的海洋研究能力以及增加对出海平台和基础设施的投资的有效性都是重要的。这项研究探讨了扩大最近安装在大学国家海洋实验室系统(海洋实验室系统)舰队中一些船只上的多波束声纳系统能力的可能性。这项研究将包括分析在探索西太平洋活跃的海底火山罗塔1号时偶然收集的中水声纳探测数据，同时调查人员正在研究火山喷发动力学和火山沉积。在巡航过程中，很明显，新的声纳能够探测到火山喷发产生的气体，这些气体表现为来自火山口的一连串气泡。研究将包括检查和处理新的声纳数据，试图提取喷发羽流的高度、强度和方向，以及这些如何随时间变化。它还将把水中羽流的结果与为最初资助的项目目的收集的目视和化学数据进行比较，以便可以用同时在该地区作业的遥控潜水器进行的补充物理测量对结果进行校准。这项新资助的工作的一个主要目标将是衡量水中多波束气泡序列数据集的有用性，并找出从这些数据中可以学到什么，以了解海底火山活动。如果成功，同样的技术可以用来更好地了解大陆边缘的低温渗漏和与海洋天然气水合物矿床相关的气泡列车。这项工作的更广泛影响包括开发新的科学基础设施，为联索政治处船只上的多波束声纳开发新的水中成像能力，以及研究生培训。