Wave Induced Sediment Enrichment in Arctic Coastal Ice Covers

该项目是一个实验室研究的结合海洋底部 沉积物变成海冰覆盖层。 这样的现象被广泛地观察到， 阿拉斯加北方海岸外的博福特海的浅水沃茨 海冰中可能含有大量的细粒 沉积物 泥沙对沉积物的影响很大， 光通过冰层的传输，从而影响海洋生物 冰下的过程。 这个过程的机制， 对沉积物的夹带和浓缩知之甚少。 初步研究和实验室测试表明，波浪作用 主要用于将悬浮沉积物输送到冰盖。 这 该项目将开发这种运输模式的理论模型， 用振荡波浪水槽测试模型， 波浪频率对泥沙淤积的影响及试验 持续时间 期望的是，实验数据将允许 天然河道后续含沙量预测 环境作为区域气候条件和海洋的函数 波浪和水流状态。

This project is a laboratory study of the incorporation of ocean bottom sediment into a sea ice cover. Such a phenomenon is widely observed in the shallow waters of the Beaufort sea off the northern coast of Alaska where the sea ice may contain large concentrations of fine-grained sediment. The included sediment has a significant effect on the transmission of light through the ice and thus affects marine biological processes beneath the ice. The mechanics of the process by which sediments are entrained and concentrated are poorly understood. Preliminary studies and laboratory tests indicate that wave action predominates in transporting suspended sediment to the ice cover. This project will develop a theoretical model of such a transport mode and test the model with an oscillating wave tank which will quantify the retained sediment as a function of wave frequency and experiment duration. The expectation is that the experimental data will allow a prediction of the subsequent sediment concentration in the natural environment as a function of regional climatic conditions and the ocean wave and current regime.