The Impact of Subsurface Fluid Advection on Coastal Ocean Chemistry

地下流体平流对沿海海洋化学的影响

• 批准号: 9712298
• 负责人: Willard Moore
• 金额: $ 45.57万
• 依托单位: University of South Carolina at Columbia
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-10-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9712298&HistoricalAwards=false
• 关键词: Impact; Subsurface; Fluid; Advection; Coastal

Moore (OCE-9712298) ABSTRACT Moore, Shaw- OCE 9711298 The impact of submarine groundwater discharges (SGWD) on the coastal ocean has been suggested to be quite significant for a variety of chemical cycles and biogeochemical processes in the near shore region. Data however to quantify and chemically characterize these groundwater fluxes are difficult to obtain and are lacking in ocean and hydrological sciences. The lead PI Moore has already shown that the key to determining the scale of SGWD are measurements of short-lived radium isotopes, 223Ra and 224Ra, and the longer lived 226Ra. The association with the second PI Shaw, adds the important expertise to measure Ba and stable trace elements, so that the PI's can better evaluate the influence of these groundwater fluxes on a broad range of trace elements and nutrients that are of wider interest to the marine sciences, hyrological sciences and coastal management communities. The PI's propose to place bounds on the fluxes and inputs of groundwaters using a regional sampling approach. During the project, field sampling will be conducted on three major cruises in the South Atlantic Bight between North Carolina and Florida. Shorter cruises are proposed to respond to specific drought, storm or rainfall events. Groundwater investigations utilizing existing wells near these study sites are also proposed. Overall, the combination of their unique tracer measurements and ancillary data will allow the PI's to evaluate the impact of goundwater fluxes on the coastal oceans, and the important controls on the strengths and composition of these fluxes.

Moore（OCE-9712298）摘要Moore，Shaw-OCE 9711298海底地下水排放（SGWD）对沿海海洋的影响对于各种化学周期和近海岸地区的生物地质学过程都非常重要。 但是，很难获得这些地下水通量来量化和化学特征的数据，并且在海洋和水文科学中很难获得。 PI Moore的铅已经表明，确定SGWD尺度的关键是短寿命镭同位素，223RA和224RA的测量，以及更长的寿命226RA。 与第二个PI Shaw的关联添加了测量BA和稳定的微量元素的重要专业知识，以便PI可以更好地评估这些地下水通量对海洋科学，音乐学科学和沿海管理社区的广泛痕量元素和养分的影响。 PI建议使用区域采样方法将界限放在地下水的通量和输入上。 在该项目期间，将对北卡罗来纳州和佛罗里达州南大西洋野战的三个主要巡游进行现场抽样。 提议较短的巡游来应对特定的干旱，风暴或降雨事件。 还提出了利用这些研究地点附近现有井的地下水调查。 总体而言，其独特的示踪剂测量和辅助数据的结合将使PI能够评估Goundwater通量对沿海海洋的影响，以及对这些通量的强度和组成的重要控制。