Controls on Terrigenous Organic Carbon Inputs to the Gulf of Mexico over Glacial/Interglacial Scales

P.I.：GONI提案编号：97-01940机构：南卡罗来纳大学标题：Career：海洋中溶解有机物的非点源：沿海土壤和沉积物中的地下水众所周知，河流是沿海海洋中溶解有机物(DOM)的重要来源。然而，最近的研究表明，地下水输入可能会为美国东南部等地区的沿海海洋贡献大量陆源DOM。这项建议的主要研究目标是了解地下水成分的扩散流动如何影响沿海环境中碳、氮和其他营养物质的动态。研究工作旨在回答三个具体问题：1)地下水DOM的来源和特征是什么？2)地下水DOM的产生和运移的季节动态是什么？3)地下水DOM对沿海海洋有何影响？该提案的另一个重要目标是将上述研究目标与对处于职业生涯不同阶段的学生的教育联系起来。这项建议使学生成为调查的主要参与者，旨在了解地下水在DOM自行车中的作用。这种参与的工具包括北湾巴鲁克实验室(SC)新的实地暑期课程，以及新的以实验室为基础的研究生和非专业本科课程。

P.I.: Goni Proposal Number: 97-01940 Institution: University of South Carolina Title: CAREER: Non-point sources of dissolved organic matter to the ocean: groundwaters from coastal soils and sediments It is well established that rivers are an important source of dissolved organic matter (DOM) to the coastal ocean. However, recent studies have shown that groundwater inputs might contribute a significant amount of terrigenous DOM to the coastal ocean in areas such as the southeastern U.S. The primary research objective of this proposal is to understand how the diffused flow of groundwater constituents affects the dynamics of carbon, nitrogen and other nutrients in coastal environments. The research efforts are designed to answer three specific questions: 1) What are the sources and characteristics of groundwater DOM?; 2) What are the seasonal dynamics of groundwater DOM production and transport? and 3) What are the impacts of groundwater DOM on the coastal ocean? Another important goal of the proposal is to link the research objectives outlined above with the education of students at different stages of their careers. This proposal makes students key participants of the investigations designed to understand the role of groundwater in DOM cycling. The vehicles for such participation include new field summer courses at the Baruch Laboratories in North Inlet (SC) and new laboratory-based graduate and non-major undergraduate courses.