CAREER: Hydrothermal Vent Flow and Temperature Fluctuations: Exploring Long-Term Variability through an Integrated Research and Education Program

职业：热液喷口流量和温度波动：通过综合研究和教育计划探索长期变化性

• 批准号: 0449578
• 负责人: Daniela Di Iorio
• 金额: $ 55.21万
• 依托单位: University of Georgia Research Foundation Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-03-01 至 2011-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0449578&HistoricalAwards=false
• 关键词: CAREER; Hydrothermal; Vent; Flow; Temperature

0449578Intellectual Merit. This integrated research and education CAREER proposal will focus on long term dynamics of hydrothermal vent flow at the Main Endeavour vent field and will attract students and teachers to participate in a physical science and engineering discipline. Measurements will be made of the vertical flow, the horizontal (advective) flow, together with temperature fluctuations. Until recently, there has been no method available that could provide these measurements simultaneously over an extended period of time ( months) and that could provide spatially averaged data without requiring placement of sensors within the flow field. This will be accomplished by deploying a newly developed acoustic scintillation system (built through collaborations with industry) at the Main Endeavour vent field. The extended measurements (7 months per year) will monitor changes in flow and heat flux that can then be compared with independent seismic data collected by NOAA/PMEL thus testing the hypothesis that vent flow is affected by geological processes. The Endeavour site lies within the US Navy's SOund SUrveillance System (SOSUS) hydrophone array, which is capable of detecting weak seismic events associated with earthquakes along the Juan de Fuca Ridge. The SOSUS data will provide the opportunity to compare vent dynamics to seismic events for understanding the short- or long-term changes in the hydrothermal flow. Monitoring hydrothermal flow and seismicity can yield clues about the subsurface recharge mechanisms, and biological and chemical changes due to changing vent flow, thus we need to know more about it.The educational component will be integrated at all stages of this research targeting high school Ocean Science Bowl team members, undergraduate and graduate students as well as high school science teachers. Integration will include student and high school teacher participation in instrument development, field experiments, and data analysis. A graduate student thesis will focus on the long-term variability in vent dynamics. Data and results will be included in revised upper level physical oceanography, and marine sciences for teachers courses introducing quantitative and critical thinking strategies. Since the proposed research focuses on the dynamics of fluid flow and turbulence, a flow tank will be used to demonstrate and visualize the complexity of fluid flow to all students as lab exercises.Broader Impacts. The broader impacts for this research project include collaborations with industry to support the development of a new instrument that can be used in seafloor observatory initiatives like NEPTUNE. This observatory goal is to link scientists, educators, and decision makers to Juan de Fuca Ridge discoveries via the Internet by laying cables near the hydrothermal black smokers, which are so abundant on the Juan de Fuca Ridge. The lifespan for this cabled network will be intended for 30 years and future scintillation systems can be developed to monitor the buoyancy driven flows in real time using this network. Collaborations with other investigators, for example, NSF RIDGE 2000 funded research at the Main Endeavour vent field, could potentially include other data to corroborate results and find correlation of events. These collaborations will enhance the early career of Di Iorio's hydrothermal vent research. The broader impacts for the educational component is to actively encourage high school, undergraduate (women and minorities) and graduate students to pursue physical oceanography or ocean engineering careers, and to broaden their knowledge so that students can become more informed citizens on physical oceanographic issues. Partnerships with high school science teachers will lead to incorporating research into education curriculum that can be disseminated to others by CD media. The development of a small flow tank will enhance the educational infrastructure for actively learning the dynamics of fluid flow. The skills the students, teachers (and the principal investigator) will develop through this integrated research and educational plan will prepare them for academic excellence in these fields (or other disciplines of marine sciences) at all stages of their careers. This proposal will provide the principal investigator with a firm foundation for making a lifetime of integrated contributions to teaching (at all levels) and research.

0449578知识价值。这一综合研究和教育的职业计划将重点关注主要奋进喷口区域热液喷口流动的长期动力学，并将吸引学生和教师参与物理科学和工程学科。将测量垂直流动、水平（平流）流动以及温度波动。直到最近，还没有一种方法可以在很长一段时间（几个月）内同时提供这些测量，并且可以在不需要在流场中放置传感器的情况下提供空间平均数据。这将通过部署一个新开发的声闪烁系统（通过与工业界合作建立）来完成。延长的测量（每年7个月）将监测流量和热通量的变化，然后与NOAA/PMEL收集的独立地震数据进行比较，从而验证喷口流量受地质过程影响的假设。奋进号位于美国海军的声音监视系统（SOSUS）水听器阵列中，该阵列能够探测到胡安德富卡山脊沿线与地震相关的弱地震事件。SOSUS数据将提供机会，将喷口动力学与地震事件进行比较，以了解热液流动的短期或长期变化。通过对热液流动和地震活动的监测，可以了解地下补给机制，以及由于喷口流量变化而引起的生物和化学变化，因此我们需要更多地了解它。教育部分将被整合到这项研究的各个阶段，目标是高中海洋科学碗团队成员、本科生和研究生以及高中科学教师。整合将包括学生和高中教师参与仪器开发、实地实验和数据分析。一篇研究生论文将着重于喷口动力学的长期变异性。数据和结果将包括在修订后的高级物理海洋学和海洋科学教师课程中，介绍定量和批判性思维策略。由于本研究的重点是流体流动和湍流的动力学，因此将使用一个流动箱作为实验练习，向所有学生演示和可视化流体流动的复杂性。更广泛的影响。该研究项目的更广泛影响包括与工业界合作，支持开发可用于NEPTUNE等海底观测计划的新仪器。这个天文台的目标是通过互联网将科学家、教育工作者和决策者与胡安·德·富卡岭的发现联系起来，方法是在胡安·德·富卡岭丰富的热液黑烟附近铺设电缆。该电缆网络的使用寿命预计为30年，未来可以开发闪烁系统，利用该网络实时监测浮力驱动的流体。与其他研究人员的合作，例如，由NSF RIDGE 2000资助的在“奋进号”主要喷发区进行的研究，可能会包括其他数据来证实结果并发现事件之间的相关性。这些合作将加强迪奥里奥早期的热液喷口研究。对教育部分的更广泛影响是积极鼓励高中生、本科生（妇女和少数民族）和研究生从事物理海洋学或海洋工程事业，并扩大他们的知识，使学生能够成为更了解物理海洋学问题的公民。与高中科学教师的伙伴关系将导致将研究纳入教育课程，并可通过CD媒体传播给其他人。小型流槽的开发将增强主动学习流体动力学的教育基础设施。学生、教师（和首席研究员）将通过这一综合研究和教育计划培养的技能，将为他们在职业生涯的各个阶段在这些领域（或海洋科学的其他学科）取得学术成就做好准备。该提案将为首席研究员提供一个坚实的基础，使其终身为教学（各级）和研究做出综合贡献。