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：职业：海洋溶解有机质的非点源：沿海土壤和沉积物的地下水众所周知，河流是沿海海洋溶解有机质（DOM）的重要来源。然而，最近的研究表明，地下水输入可能为美国东南部等地区的沿海海洋贡献了大量的陆源DOM。本提案的主要研究目的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产生和运移的季节动态特征是什么？3)地下水DOM对沿海海洋的影响是什么？该提案的另一个重要目标是将上述研究目标与学生职业生涯不同阶段的教育联系起来。该提案使学生成为旨在了解地下水在DOM循环中的作用的调查的主要参与者。这种参与的工具包括在北入口（SC）的巴鲁克实验室的新实地暑期课程和新的以实验室为基础的研究生和非主要本科课程。

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.