Tracer Based Examination of Halocline and Fresh Water Exchange in the Western Arctic

KELLYOREGON州立大学调查人员将检查波弗特海的水和沉积物中是否存在钡，作为被洋流带离大陆架的颗粒物的河流来源的示踪剂。已证明，钡示踪剂是确定沿海和盆地区域之间交换过程的有效示踪剂，因此，将是研究碳从多产大陆架到深盆地的路径和交换率的极佳途径。研究人员将检查水样和沉积物中的钡，并在模型中使用测量结果来揭示北冰洋的近海环流模式。继续开发一种可用于从船上测量钡的新的钡分析仪仪器。该项目是大陆架-盆地相互作用项目的重要组成部分，该项目旨在审查控制碳从具有生物生产力的北冰洋大陆架向深盆地输送的过程。该项目的结果将为2002年在同一地理区域规划陆架盆地相互作用项目的大型第二阶段实地方案提供投入。

ABSTRACTOPP-9815707FALKNER, KELLYOREGON STATE UNIVERSITYThe investigator will examine the presence of barium in the water and sediment in the Beaufort Sea as a tracer for river sources of particles that are carried off the continental shelf by oceanographic currents. The barium tracer has been shown to be an effective tracer for determining exchange processes between coastal and basin regions and, as such, will be an excellent way to examine the pathways and exchange rate of carbon from the productive continental shelf to the deep basin. The investigator will examine water samples and sediment-trap sediments for barium and use the measurements in a model to reveal offshore circulation patterns in the Arctic Ocean. Continued development of a new instrument for a barium analyzer that can be used to measure barium from a ship. The project forms an important component of the Shelf-Basin Interaction project which is designed to examine the processes that control the transport of carbon from the biologically productive Arctic Ocean continental shelf to the deep basin. The results of this project will provide input for planning a large Phase 2 field program of the Shelf Basin Interactions project in 2002 in the same geographic area.