Multitracers II-Wintertime Particle Production, Transport, and Sedimentation

Multitracers项目的一个重要目标是 量化古生产力（定义为有机碳通量 （指真光层）位于俄勒冈州海岸， 从最后一次盛冰期到现在通过实现这一点 PI的目标还将开发古生产力示踪剂， 可以应用于海洋的其他地方， 每种示踪剂的局限性。三个沉积物捕集器系泊系统 形成一个远离俄勒冈州海岸的样带是一个关键方面 示踪剂校准。方法是应用多个 生产率示踪剂--大量有机部分、无机部分 元素（Cu、Zn、Ba）、有机地球化学生物标志物， 微体化石--确定何时所有的微体化石都给出了一致的信息 并确定它们何时开始追踪古海洋地貌 生产力以外的变量。为一个 多示踪剂项目的额外野外季节， 包括在两个近海部署两个为期6个月的陷阱 网站.高分辨率沉积物捕获数据和水 来自springtime的列信息应该能够 充分确定冬-春生产力事件， 地区此外，沉积物的三年时间序列 陷阱通量将有助于了解年际变化的 加州洋流的生产力这表示 修改以前资助的项目， “Multitracers to predict paleoproductivity in the加州 沉积物和沉积物收集器材料的水流系统” （OCE-8609366）。

An important goal of the Multitracers Project is to quantify paleoproductivity (defined as organic carbon flux out of the euphotic zone) off the coast of Oregon from the peak of the last glacial maximum to the present. By accomplishing this goal the PIs will also develop paleoproductivity tracers that can be applied elsewhere in the oceans, and establish the limitations of each tracer. Three sediment trap moorings forming a transect away from the Oregon coast are a key aspect of the tracer calibration. The approach is to apply multiple tracers for productivity-the bulk organic fraction, inorganic elements (Cu,Zn,Ba), organic geochemical biomarkers, and microfossils-to determine when all give consistent information and to determine when each begins to track paleoceanogrphic variables other than productivity. Funding is provided for an additional field season for the Multitracers Project, consisting of two 6-month trap deployments at the two inshore sites. The high-solution sediment trap data and the water column information from the springtime should enable to adequately define winter-spring produtivity events in the region. In addition, the three-year time series of sediment trap fluxes will help understand the interannual variability of productivity in the California Current. This represents a modification to the previously-funded project entitled "Multitracers to predict paleoproductivity in the California Current System from sediment and sediment trap materials" (OCE-8609366).