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DOI | 10.5194/tc-13-2887-2019 |
Wave energy attenuation in fields of colliding ice floes - Part 1: Discrete-element modelling of dissipation due to ice-water drag | |
Herman A.; Cheng S.; Shen H.H. | |
发表日期 | 2019 |
ISSN | 19940416 |
EISSN | 13 |
起始页码 | 2887 |
结束页码 | 2900 |
卷号 | 13期号:11 |
英文摘要 | The energy of water waves propagating through sea ice is attenuated due to non-dissipative (scattering) and dissipative processes. The nature of those processes and their contribution to attenuation depends on wave characteristics and ice properties and is usually difficult (or impossible) to determine from limited observations available. Therefore, many aspects of relevant dissipation mechanisms remain poorly understood. In this work, a discrete-element model (DEM) is used to study one of those mechanisms: dissipation due to ice-water drag. The model consists of two coupled parts, a DEM simulating the surge motion and collisions of ice floes driven by waves and a wave module solving the wave energy transport equation with source terms computed based on phase-averaged DEM results. The wave energy attenuation is analysed analytically for a limiting case of a compact, horizontally confined ice cover. It is shown that the usage of a quadratic drag law leads to non-exponential attenuation of wave amplitude a with distance x, of the form a(x)=1/(ax+1) |
学科领域 | digital elevation model; modeling; sea ice; simulation; water wave; wave attenuation; wave energy; wave scattering; wave velocity |
语种 | 英语 |
scopus关键词 | digital elevation model; modeling; sea ice; simulation; water wave; wave attenuation; wave energy; wave scattering; wave velocity |
来源期刊 | The Cryosphere |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/118811 |
作者单位 | Institute of Oceanography, University of Gdańsk, Gdańsk, Poland; Nansen Environmental and Remote Sensing Center, Bergen, Norway; Department of Civil and Environmental Engineering, Clarkson University, Potsdam, NY, United States |
推荐引用方式 GB/T 7714 | Herman A.,Cheng S.,Shen H.H.. Wave energy attenuation in fields of colliding ice floes - Part 1: Discrete-element modelling of dissipation due to ice-water drag[J],2019,13(11). |
APA | Herman A.,Cheng S.,&Shen H.H..(2019).Wave energy attenuation in fields of colliding ice floes - Part 1: Discrete-element modelling of dissipation due to ice-water drag.The Cryosphere,13(11). |
MLA | Herman A.,et al."Wave energy attenuation in fields of colliding ice floes - Part 1: Discrete-element modelling of dissipation due to ice-water drag".The Cryosphere 13.11(2019). |
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