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.

摩尔（OCE-9712298） 摘要 摩尔，肖- OCE 9711298 海底地下水排放对海岸海域的各种化学循环和海洋地球化学过程具有重要的影响。 然而，难以获得数据来量化和化学表征这些地下水通量，海洋和水文科学也缺乏这些数据。 铅PI摩尔已经表明，确定SGWD规模的关键是测量短寿命的镭同位素223 Ra和224 Ra，以及寿命较长的226 Ra。 与第二个PI Shaw的合作增加了测量Ba和稳定微量元素的重要专业知识，因此PI可以更好地评估这些地下水通量对海洋科学，水文科学和沿海管理社区更广泛感兴趣的各种微量元素和营养素的影响。 PI建议使用区域抽样方法对地下水的通量和输入进行限制。 在该项目期间，将在北卡罗来纳州和佛罗里达之间的南大西洋湾的三次主要航行中进行实地取样。 为应对具体的干旱、风暴或降雨事件，建议进行较短的航行。 地下水调查利用现有的 还建议在这些研究地点附近打威尔斯井。 总的来说，其独特的示踪剂测量和辅助数据的组合将使PI的，以评估地下水通量对沿海海洋的影响，以及这些通量的强度和组成的重要控制。