Collaborative Research: Transport, Transformation and Utilization of Dissolved Organic Matter in the NE Atlantic Ocean

溶解有机质(DOM)向输出区的运移过程主要是从少数几个表层积累的溶解有机碳(DOC)浓度升高和向深层渗透的剖面推断出来的。还没有研究从源头地区流向出口地点的分解，也没有研究伴随的溶解有机氮和磷的运输(DON和DOP)。在这个项目中，弗吉尼亚海洋科学研究所和罗森斯蒂尔海洋与大气科学学院的研究人员将观察东北大西洋春季浮游植物水华期间积累的DOC、DON和DOP的输送，该地区之前曾在JGOFS北大西洋水华实验中进行过研究。他们将跟踪越冬和新产生的DOM的运输和同时分解，因为它流经东北大西洋，流向英国东北部挪威海的底水形成地点。该项目将利用2001年春季在英国考察船RRS Charles Darwin上与英国南安普顿海洋中心(SOC)乔治执事分部的同事一起参与对东北大西洋进行详细的水文调查的机会。主要的邮轮目标是计算流量运输量，从中可以估计DOM的质量运输量。虽然现在已经勾勒出这些过程的大致轮廓，但还没有在相关水文框架中明确研究DOM传输的详细研究，也没有确定正在进行的分解的同时估计的研究。这项研究是生物地球化学家、微生物生态学家和物理海洋学家之间的合作，将首次提供关于DOC、DON和DOP浓度、体积传输和分解速率的天气数据，从中可以评估DOM组分的质量传输。

ABSTRACTOCE-0095223 and OCE-0095090The process of dissolved organic matter (DOM) transport toward export regions has been inferred mostly from a few sections showing surface accumulation of enhanced dissolved organic carbon (DOC) concentration and penetration to depth. Decomposition during flow from source regions to export sites has not been studied, nor has the accompanying transport of dissolved organic nitrogen and phosphorus (DON and DOP). In this project, researchers at the Virginia Institute of Marine Science and the Rosenstiel School of Marine and Atmospheric Sciences will observe the transport of accumulated DOC, DON and DOP during the spring phytoplankton bloom in the NE Atlantic Ocean, the region previously studied in the JGOFS North Atlantic Bloom Experiment. They will track the transport and simultaneous decomposition of both the overwintering and newly-produced DOM as it flows through the NE Atlantic toward a site of bottom water formation to the northeast of the U.K. in the Norwegian Sea. This project will take advantage of an opportunity to participate on a detailed hydrographic survey of the NE Atlantic in spring 2001 aboard the U.K. research vessel RRS CHARLES DARWIN with colleagues from the George Deacon Division of the Southampton Oceanography Centre (SOC), U.K. A principal cruise objective is to calculate volume transports, from which mass transport of DOM can be estimated. While the broad outlines of these processes have now been sketched in, there have been no detailed studies in which DOM transport has been explicitly studied in the relevant hydrographic framework, and none in which simultaneous estimates of underway decomposition have been determined. This study, a collaboration among biogeochemists, microbial ecologists, and physical oceanographers would be the first to provide synoptic data on DOC, DON and DOP concentrations, volume transports and decomposition rates, from which mass transport of DOM components can be assessed.