The Thermal Output of a Sea-Floor Hydrothermal System

海底热液系统的热输出

• 批准号: 9012240
• 负责人: John Lupton
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-08-01 至 1992-05-01
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9012240&HistoricalAwards=false
• 关键词: Thermal; Output; Sea; Floor; Hydrothermal

This project will use the DSRV ALVIN to directly study the dynamics of turbulent buoyant plumes emanating from active hydrothermal vents. The aim of the project is to provide a sound basis for relating water-comumn measurements of the effluent plumes to the thermal output of the underlying oceanic crust. The PI's propose to mount an instrument package on ALVIN that will measure temperature, conductivity (salinity), vertical and horizontal velocity, light attenuation (particledensity), and concentrations of manganese, silica, and sulfide in real time via in situ flow injection analysis. The instrument will also collect discrete water samples for laboratory analyses. Data and water samples will be collected in real time shile driving ALVIN through buoyant hydrothermal plumes at several heights in the water column. Undiluted hydrothermal source fluids and the surrounding water column will also be studied. Specific objectives incluse: (1) characterization of vertical and lateral variation in physical properties, velocities, chemical concentrations, and suspended particles within the buoyant plume, (2) quantification of entrainment and dilution rates as function of plume height, (3) determine turbulent variability in the buoyant plume and relate to property variations, and (5) testing numerical plume models against field measurements.

该项目将使用DSRV ALVIN直接研究由活性热液通风孔产生的湍流浮体的动力学。该项目的目的是为将羽流羽流与基础海洋壳的热量输出相关联，提供合理的基础。 PI提议将仪器包装在ALVIN上，以测量温度，电导率（盐度），垂直和水平速度，光衰减（颗粒强度）以及锰，二氧化硅和硫化物的浓度通过原位流动注射分析实时实时。该仪器还将收集离散的水样品进行实验室分析。数据和水样将在水柱中的几个高度上通过浮力的水热羽流实时收集。还将研究未稀释的水热源流体和周围的水柱。具体目标包含：（1）表征物理性能，速度，化学浓度以及浮力羽流中悬浮颗粒的垂直和横向变化，（（2）将夹带和稀释率定量作为羽状高度的功能，（3）确定浮力羽流中的湍流变异性，并与属性变化相关，并测试了（5）测试模型。