Relating the Optical Properties of CDOM within the Ocean Basins to Source and Structure

将海洋盆地内 CDOM 的光学特性与来源和结构联系起来

• 批准号: 1357411
• 负责人: Neil Blough
• 金额: $ 50.04万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1357411&HistoricalAwards=false
• 关键词: Relating; Optical; Properties; CDOM; within

Chromophoric dissolved organic matter (CDOM) is optically measured material in the oceans resulting from the degradation of organic matter. While the importance of CDOM in the optical properties and biogeochemistry of marine waters has been well established over the last several decades, the source and structure of this material within the ocean basins remains unclear. Some studies indicate that CDOM is produced primarily in situ from either the chemical or biological processing of marine materials, while others have provided evidence that CDOM is primarily a remnant of terrestrial matter that has been diluted and modified during transit to and within the oceans. In this study, researchers from the University of Maryland Center for Environmental Studies will use complete spectral absorption and emission properties combined with chemical and mass spectral tests on samples from the North Pacific Ocean to determine the source and structure of CDOM. The results will be compared with those previously acquired, or to be acquired, from the Delaware Bay, the Middle Atlantic Bight, and the Equatorial Atlantic. By employing this multifaceted approach, the researchers will significantly advance our knowledge of CDOM.Broader Impacts: This project will provide support for graduate and undergraduate student training, and results will be broadly disseminated through peer-reviewed research publications and presentations at national meetings, where student-led presentations will be emphasized.

有色溶解有机物(CDOM)是海洋中有机物降解的光学测量物质。虽然CDOM在海洋水域的光学性质和生物地球化学方面的重要性在过去几十年中已经得到了很好的证实，但这种物质在海洋盆地中的来源和结构仍然不清楚。一些研究表明，CDOM主要是在海洋材料的化学或生物加工过程中就地产生的，而另一些研究提供的证据表明，CDOM主要是陆地物质的残留物，在运往海洋和海洋内部的过程中被稀释和修改。在这项研究中，马里兰大学环境研究中心的研究人员将利用北太平洋样品的完整光谱吸收和发射特性，结合化学和质量光谱测试来确定CDOM的来源和结构。结果将与以前从特拉华湾、中大西洋海湾和赤道大西洋获得的或将获得的结果进行比较。通过采用这种多方面的方法，研究人员将显著提高我们对CDOM的了解。Broader的影响：该项目将为研究生和本科生的培训提供支持，结果将通过同行评议的研究出版物和在全国会议上的陈述广泛传播，其中将强调学生主导的陈述。