Dissolved Organic Carbon: Concentrations and Rates of Mineralization in the Arabian Sea

虽然海洋有机地球化学的大部分研究工作都是针对颗粒物质，但世界海洋中的大部分有机物都是溶解的（DOM）。尽管DOM储量丰富，但人们对其化学性质、在海洋碳氮循环中的反应性和作用以及与全球CO2循环的关系知之甚少。在这项研究中，研究者将调查阿拉伯海DOM的分布、生产和矿化（特别是碳和氮成分）。作为美国JGOFS阿拉伯海过程研究小组的一员，该研究员将研究DOM的产生和矿化与季风季节性强迫相关的浮游植物和浮游细菌动力学的关系。通过将这些研究与其他科学家对碳生产、消费和运输的其他方面的同时调查联系起来，将更清楚地了解DOM在海洋碳循环中的作用。

9311012 HANSELL Although most of the research effort in marine organic geochemistry has been directed toward particulate material, most of the organic matter in the world ocean is dissolved (DOM). Despite its abundance, little is known about the chemical nature of DOM, its reactivity and role in the marine carbon and nitrogen cycles, and its relationship to the global CO2 cycle. In this study the investigator will investigate the distribution, production, and mineralization of DOM (specifically the carbon and nitrogen components) in the Arabian Sea. As part of a team of scientists in the U.S. JGOFS Arabian Sea Process Study, the investigator will study the relationship of DOM production and mineralization to phytoplankton and bacterioplankton dynamics associated with seasonal forcing by the monsoon winds. By relating these studies to other scientists' simultaneous investigations of other aspects of carbon production, consumption, and transport, a clearer understanding of the role of DOM in the marine carbon cycle will be gained.