Collaborative Research: Quantifying Hydrothermal Flow and Heat Transfer Using Acoustic Imaging in the NEPTUNE Canada Cabled Observatory at Main Endeavour Field, JdFR

合作研究：在 Main Endeavor Field 的 NEPTUNE 加拿大有线观测站使用声学成像量化热液流动和传热，JdFR

• 批准号: 1234141
• 负责人: Karen Bemis
• 金额: $ 35.1万
• 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: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1234141&HistoricalAwards=false
• 关键词: Collaborative; Research; Quantifying; Hydrothermal; Flow

Due to the difficulty in working in the deep sea, especially around high-termperature hydrothermal vents that belch hot, corrosive, metal-rich fluids into ocean, novel instumentation needs to be developed and tested so important thermal and chemical fluxes associated with these systems can be determined. This research involves the testing, implementation, and data recovery from a unique acoustic sonar system (COVIS) that uses acoustic sonar and doppler phase shifts to make quantitative measurements of hydrothermal vent plume rise rates, volume fluxes, and plume shapes and distributions with time. Software will also be generated to enable processing of the resulting data and the extraction of heat fluxes, both in the plume emmanating from the hydrothermal vent and its rising thermal plume and from the diffuse flow of hot water along the seafloor around the vent. Field testing will occur at the Grotto hydrothermal vent cluster at the Endeavor vent field on the Juan de Fuca Ridge which is presently part of the Canadian mid-ocean ridge monitoring station. Resulting quantitative acoustic images of the plumes will be used to generate seafloor heat flux values that are fundamental to understanding the dynamics of hydrothermal venting. Three dimensional images of the hydrothermal plumes coming from the Grotto vents will also be generated. Project goals include determining linkages between time-varying flow measurements on the seafloor and fluxes higher in the water column. Broader impacts of the work include building infrastructure for oceanographic science in terms of developing hardware and software that will complement and potentially be implemented on NSF's newly installed Ocean Observing System infrastructure at the vent fields at Axial Volcano on the Juan de Fuca Ridge, which is slated to be instrumented in 2013. Additional impacts include international collaboration with Canadian scientists, support of an institution in an EPSCoR state (New Jersey), support of two PIs from groups under-represented in the sciences, training of graduate and undergraduate students, and public outreach through the NEPTUNE Canada and NOAA outreach engines.

由于在深海工作的难度很大，特别是在高温热液喷口周围，这些热液喷口会将高温、腐蚀性、富含金属的流体喷入海洋，因此需要开发和测试新型仪器，以便能够确定与这些系统相关的重要热通量和化学通量。这项研究涉及独特的声纳系统 (COVIS) 的测试、实施和数据恢复，该系统使用声纳和多普勒相移来定量测量热液喷口羽流上升速率、体积通量以及羽流形状和分布随时间的变化。还将生成软件来处理所得数据并提取热通量，包括从热液喷口及其上升的热羽流中发出的热通量，以及从沿着热液喷口周围海底的热水扩散流中提取的热通量。现场测试将在胡安德富卡海岭奋进喷口场的石窟热液喷口群进行，胡安德富卡海岭目前是加拿大洋中脊监测站的一部分。由此产生的羽流定量声学图像将用于生成海底热通量值，这对于理解热液喷发的动力学至关重要。还将生成来自石窟喷口的热液羽流的三维图像。项目目标包括确定海底随时间变化的流量测量值与较高水柱中的通量之间的联系。这项工作的更广泛影响包括在开发硬件和软件方面建设海洋科学基础设施，这些硬件和软件将补充并可能在 NSF 在胡安德富卡山脊轴流火山喷口场新安装的海洋观测系统基础设施上实施，该基础设施预计于 2013 年安装仪器。其他影响包括与加拿大科学家的国际合作、对 EPSCoR 州的一个机构的支持（新） 泽西岛），来自科学领域代表性不足的群体的两名 PI 的支持，研究生和本科生的培训，以及通过 NEPTUNE Canada 和 NOAA 外展引擎进行的公众外展。