Next Generation Flux Meters For Enhanced Geochemical And High-Resolution Real-Time Benthic Flux Monitoring

用于增强地球化学和高分辨率实时底栖通量监测的下一代通量计

• 批准号: 0241998
• 负责人: Kevin Brown
• 金额: $ 23.67万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-15 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241998&HistoricalAwards=false
• 关键词: Next; Generation; Flux; Meters; Enhanced

P.I. Brown, Kevin (SIO) Proposal #: 0241998Proposal Title: Next Generation Flux Meters For Enhanced Geochemical And High-Resolution Real-Time Benthic Flux MonitoringProject Summary This proposal will fund the development and construction of two prototype instruments that measure fluid flux in cold seep environments typical of continental margin areas. These instruments have an improved capability for long-term monitoring of flow transience, from tidal to multi-month scales, and geochemical sampling. The funds will be used to build and sea test (a) an electronic optical flow system (OFS) and (b) an enhanced osmotic flow meter system (CAT II) optimized for geochemical sampling (including noble gasses). These two benthic measurement devices can be used in conjunction or separately to measure fluid flow and fluxes of dissolved chemical species of interest in cold seep environments in the following ways: a) real-time fluid flow measurements when used in conjunction with satellite/buoy or cable observatories, b) measurement of transience in fluid flow from tidal to multi-month time scales, c) enhanced seabed coupling with remote collection chambers to negate current induced noise, d) reduced dead space in collection chamber improving response time for geochemical sampling, and e) increased chemical sampling ability with the addition of gas sampling capability for noble gases and methane.The PI will test the new instrumentation in lab simulations, offshore, and in situ through deployment in a seep area where other measurements are available for comparison. The Pi is also actively pursuing a test at a prototype deep-water, acoustically linked, moored-buoy seafloor observatory on the Nootka Fault off Vancouver Island in the Northeast Pacific. The~18 month long moored-buoy site is at an active area of seepage and the buoy will be fitted with an ocean bottom seismometer (OBS), an acoustic-doppler current profiler (ADCP), temperature, chemical sensors, bottom pressure and pore pressure sensors, different types of seep meters, and a conductivity-temperature-depth (CTD) sensor. These additional data will enable the PI to correlate his results with several different types fluid flow estimation methods (e.g. the pore pressure sensors) as well as with different potential impulses driving any transience in flow (i.e. tides, ocean currents and seismcity).

P.I.布朗，凯文（SIO）提案＃：0241998港口标题：增强地球化学和高分辨率的实时底栖通量监控的下一代通量表大陆边缘区域的典型特征。这些仪器具有从潮汐到多个月尺度和地球化学采样的长期监测流动性的长期监测能力。资金将用于建造和海上测试（a）电子光流系统（OFS）和（b）优化用于地球化学采样（包括贵族气体）的增强的渗透流量计系统（CAT II）。这两个底栖测量设备可以通过以下方式结合或单独使用，以测量流体流量和溶解的化学物种的溶解化学物种的通量：电缆天文台，b）测量从潮汐到多个月时间尺度的流体流动流动的测量，c）增强的海底耦合与遥控收集室以消除当前的噪声，d）减少收集室中的死空间，改善了对地球化采样，，地球化学采样时间的响应时间e）通过在降低气体和甲烷中添加气体采样能力，提高化学采样能力。PI将在实验室模拟，海上近海和原位通过在其他测量区域进行比较的渗流区域中测试新​​仪器。 PI还在在东北太平洋温哥华岛的Nootka断层上，在原型深水，声学上连接的，停泊的广场海底天文台进行了积极进行测试。大约18个月的系泊设备位于渗流的活跃区域，浮标将配备海洋底部地震仪（OBS），声音多普勒电流探测器（ADCP），温度，化学传感器，底部压力和孔隙压力传感器，不同类型的渗水仪和电导率 - 温度深度（CTD）传感器。这些额外的数据将使PI与几种不同类型的流体流量估计方法（例如孔隙压力传感器）以及不同的潜在脉冲相关联（即潮汐，洋流和Seismcity）。