Submersible Investigation of Temperate Glacimarine Sedimentation, S.E. Alaska

该提案寻求支持对以下问题进行为期三年的调查： 冰川接地线的沉积过程， 以及阿拉斯加东南部的三角洲系统。 本研究设计 围绕无人驾驶巡航潜水器收集数据， 这是很难用任何其他方法得到的。 这将是 这是第一次尝试直接观察和量化过程， 现代的接地线有这样的活力。 一组四 研究人员将研究撤退，缓慢前进， 不断推进的前沿阵地， 存款 该潜水器还将用于评估潜艇 质量运动过程和颗粒的沉降， 产生层压沉积物悬浮液。 外地方案 将强调侧扫声纳提供的数据收集， 地震反射剖面，录像带，立体照片 摄影、CTD测量、海流计测量和样品 悬浮物和底层沉积物。 大多数数据将记录在 能够对现场程序进行评价的方式，以及 如有必要，修改它们。 这项研究将提供关键数据， 用于模拟冰川的过程和沉积系统， 接地线 这些结果将有助于目前的模型， 海洋冰川的准稳定性和前进。 数据将 提高沉积学模型的可靠性， 解释地层序列，并预测 不同冰川沉积中心的沉积物收支。 一个 评价沉积物重力流通道的能力 在不同的冰川海盆系统中的侵蚀。 最后，这项研究将测试一个新的假设， 可以生产。 该过程被认为适用于两者 冰川和非冰川海洋环境。

This proposal seeks support for a three-year investigation of sedimentation processes at grounding lines of tidewater glaciers, and at a deltaic system, in SE Alaska. The study is designed around an unmanned cruise-submersible to collect data that is extremely difficult to obtain using any other means. This will be the first attempt to directly observe and quantify processes at a modern grounding-line with such vigor. A group of four researchers will study retreating, slowly advancing, and rapidly advancing tidewater fronts, as well as older grounding-line deposits. The submersible will also be used to evaluate submarine mass movement processes and the settling of particles from suspension which produce laminate deposits. The field program will emphasize collection of data provided by side-scan sonar, seismic reflection profiling, video tapes, stereo still photography, CTD surveys, current meter measurements, and samples of suspended and bottom sediment. Most data will be recorded in a manner that will allow an evaluation of the field procedures, and modify them if necessary. The study will provide critical data for modelling the processes and depositional systems of glacial grounding lines. The results will contribute to current models of quasi-stability and advance of marine glaciers. The data will increase the reliability of sedimentological models for interpreting stratigraphic successions, and for predicting sediment budgets in different glacimarine depocenters. An evaluation of the ability of sediment gravity flow channels to be eroded in different glacimarine basinal systems will be made. Lastly, the research will test a new hypothesis on how laminitis can be produced. The process is thought to be applicable to both glacial and non-glacial marine environments.