Synthesis and Integration of Riverine, Oceanic and Sea Ice Tracer/Contaminant Data with High Resolution Coupled Ocean-Sea Ice Models

该提案要求提供资金，以评估各种自然和人为痕量物质（瞬态和稳态）的现有分布情况，以确定北冰洋水团及其海冰覆盖的路径和平均停留时间。 这一信息对于我们了解北冰洋及其海冰在区域和全球气候中的作用，以及海洋系统中污染物的重新分布及其通过水和冰相从北冰洋输出的作用至关重要。 一般的方法是整合现有的示踪剂和污染物数据集，并将这些整合数据集的合成结果与模型模拟联合收割机相结合。 具体而言，调查人员计划检查从几种被动示踪剂（如氚、氧和氦同位素）获得的信息，以确保与水文数据和直流测量以及动力学模型模拟的示踪剂分布保持一致。 在第二步中，研究人员计划将这些信息与测量的污染物分布进行比较，以（i）使用保守污染物作为水和海冰循环的额外示踪剂，以及（ii）通过与被动示踪剂进行比较来研究非保守污染物的源和汇。

This proposal requests funds to evaluate available distributions of a variety of natural and anthropogenic trace substances (transient and steady-state) in terms of their potential to delineate pathways and mean residence times of the Arctic Ocean water masses and its sea ice cover. This information is fundamental for our understanding of the role of the Arctic Ocean and its sea ice cover in regional and global climate, as well as in the redistribution of contaminants in the marine system, and their export from the Arctic Ocean through the water and ice phase. The general approach is to integrate existing tracer and contaminant data sets and to combine results from the synthesis of these integrated data sets with model simulations. Specifically, the investigators plan to check the information derived from several passive tracers (e.g. tritium, oxygen and Helium isotopes) for consistency with hydrographic data and direct current measurements, as well as with tracer distributions simulated by dynamical models. In a second step, the investigators plan to compare this information with measured contaminant distributions to (i) use conservative contaminants as additional tracers of water and sea ice circulation, and (ii) study sources and sinks of non-conservative contaminants through comparison with passive tracers.