Collaborative research: Chromophoric dissolved organic matter (CDOM) and lignin phenols as tracers of water masses and biogeochemical processes in the Arctic Ocean

合作研究：发色溶解有机物（CDOM）和木质素酚作为北冰洋水团和生物地球化学过程的示踪剂

• 批准号: 0713915
• 负责人: Ronald Benner
• 金额: $ 29.27万
• 依托单位: University South Carolina Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0713915&HistoricalAwards=false
• 关键词: Collaborative; research; Chromophoric; dissolved; organic

Benner 0713915University of South CarolinaFunds are provided to investigate the distribution of terrigenous organic matter and its fluorescent properties to improve understanding of ventilation processes in the Arctic halocline as well as the physical, biological, and photochemical fluxes of terrigenous organic carbon in the Arctic Ocean. The principal investigators propose a series of hypotheses for testing:Hypothesis 1: Terrigenous dissolved organic matter (DOM) and chromophoric dissolved organic matter (CDOM) are sensitive tracers of river water that carry unique source information that is not readily available with other freshwater tracers (e.g. salinity, alkalinity, barium, d18O), especially in the Canada Basin.Hypothesis 2: Terrigenous DOM and CDOM are primarily injected below the surface mixed layer during sea-ice formation and brine rejection and are useful tracers of the ventilation of Arctic halocline waters.Hypothesis 3: The Arctic halocline is a multilayer system with each layer having distinct origins. (They believe that detailed fluorescence analyses will allow them to distinguish the different origins and develop more specific in situ probes for the future.)Hypothesis 4: The size distribution of lignin phenols in DOM provides a qualitative index of the extent of decomposition of terrigenous DOM in the Arctic.The freshwater budget of the Arctic Ocean, and its variability of decadal time scales and longer, has the potential for important impacts on global ocean circulation, such as modulation of the meridional overturning circulation, and climate. This project will provide tools for the study of and insights into the pathways and fate of freshwater discharged into the Arctic Ocean from some of the world's major river systems.

Benner 0713915提供了南卡罗来纳芬群岛的大学，以调查陆质有机物及其荧光特性的分布，以提高对北极卤石中通风过程的理解，以及物理，生物，生物学和光化学的物理，生物学和光化学液体的陆地有机碳中的碳中碳。 主要研究者提出了一系列测试假设：假设1：陆源解散有机物（DOM）和成熟的溶解有机物（CDOR）是河水的敏感示踪剂，它带有独特的来源信息，可与其他淡水示踪剂不易获得，可与其他淡水示踪剂（例如，Salinity，Alkalition，Barigoth，barim barig，d18o），尤其是Cancase incancane，in Canca in cancancane，cancase of cancase in cancancane，尤其是Cancase in。在海冰形成和盐水排斥期间，CDOR主要注入表面混合层以下，是北极卤素水域通风的有用示踪剂。Hypothesis3：北极卤素是一个多层系统，每个层都具有独特的起源。 （他们认为，详细的荧光分析将使他们能够区分不同的起源，并在未来的原位探针中开发更具体的原位探针。）假设4：DOM中木质素酚的尺寸分布提供了定性索引，这些索引的索引是北极地区的陆上dom分解程度的范围。例如调节子午倾斜循环和气候。 该项目将为研究和洞察力提供工具，以了解从世界上一些主要的河流系统中排入北极海洋的淡水和命运。