Understanding the background wave-in-ice signal for improved ice profiler performance

了解冰中背景波信号以提高冰剖面仪性能

• 批准号: 538406-2019
• 负责人: Klymak, Jody
• 金额: $ 1.82万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=681265
• 关键词: Understanding; background; wave; ice; signal

The decreased summer ice extent has opened wide regions of the Arctic for the generation of surface waves. Wave heights of more than 5m are now observed regularly in the Western Arctic. The waves constitute an increasing thread of coastal erosion, affecting marine operations and shipping, and have a profound impact on the annual break-up and re-freezing of the ice cover. The physics of wave propagating into ice are complex, and include reflection at the ice edge, viscous dampening of mainly shorter wave length, flexural transmission and thus non-linear transformation of basic wave properties like wave length and wave period.ASL has been providing observational equipment and data analysis for ice monitoring in the Arctic for over 40 years. A key instrument developed at ASL is the Ice Profiler Sonar (IPS). In this project, we will develop algorithms to extend the IPS capabilities to include wave-in-ice processes. Several years of IPS data provide the basis for understanding the various wave processes present in IPS data, and to develop improved algorithm, ultimately allowing the adaptation of the IPS to the emerging, seasonally ice-free Arctic.

夏季冰的降低已为北极的广泛区域开放，以产生表面波的产生。现在在西北极定期观察到超过5m的波高度。海浪构成了沿海侵蚀的越来越多的线索，影响了海洋行动和运输，并对年度分手和重新冻结冰盖产生了深远的影响。传播到冰的波的物理学很复杂，包括在冰边缘进行反射，主要较短波长的粘性粘液，弯曲的传播，因此诸如波长和波周期之类的基本波特性的非线性转化。ASL一直在提供观测设备和数据分析在北极监测超过40年。 ASL开发的关键仪器是冰剖面声纳（IPS）。在此项目中，我们将开发算法以扩展IPS功能以包括冰上的过程。数年的IPS数据为理解IPS数据中存在的各种波过程的基础提供了基础，并开发了改进的算法，最终允许IPS适应新兴的，季节性的无冰北极。