Multitracers to Predict Paleoproductivity in the California Current System

长期沉积物收集器的部署提供了一个机会， 检查深海沉积物的保真度， 近地表海洋过程 这样的研究很重要 因为古海洋学研究的基本假设 微体古生物学和沉积物化学记录 可以用来检查海面状况的变化， 漫长的地质年代 目前建议的赔偿额将 支持对“投入”和“产出”之间的关系进行多示踪研究， 海洋沉积物中的“保存”。 使用稳定同位素， 地球化学和微体古生物学标准应该允许 准确评估地表水输入量。 该项目的实地阶段将部署一系列 加州洋流系统中的沉积物捕集器， 净生产力和表面积有很强的季节梯度 海洋学 对沉积物捕集器材料和 表层沉积物将被用来开发一套独立的 净生产力的代理。 最有可能 提供这些信息包括：生物源的，钙质的，和 硅质微体化石;重晶石;微量元素 如铜和锌;和有机物及其某些 含氮化合物，包括碘、溴和 磷。 这种分析应该与净生物学相关联。 生产力

Long-term sediment trap deployment provide an opportunity to examine the fidelity of deep-sea sediments as recorders of near-surface oceanic processes. Such studies are important because a fundamental assumption of paleoceanographic research is that the micropaleontologic and sediment chemistry record can be used to examine changes in sea surface conditions over long geologic time scales. The present recommended award will support a multitracer study of the relation of "imput" and "preservation" in marine sediments. The use of stable isotope, geochemical, and micropaleontologic criteria should allow an accurate assessment surface water input. The field phase of the project will deploy an array of sediment traps in the California Current system which has strong seasonal gradients in net productivity and surface oceanography. Analyses on the sediment trap material and surface sediments will be used to develop a set of independent proxies for net productivity. Components most likely to provide this information include: biogenous, calcareous, and siliceous microfossils; barite and bio-limiting trace elements such as copper and zinc; and organic matter and certain of its nitrogenous compounds including iodine, bromine, and phosphorous. Such analyses should correlated to net biologic productivity.