DOI: 10.1029/2018JC013763
Scopus记录号: 2-s2.0-85052375284
论文题名: Attenuation and Directional Spreading of Ocean Waves During a Storm Event in the Autumn Beaufort Sea Marginal Ice Zone
作者: Montiel F. ; Squire V.A. ; Doble M. ; Thomson J. ; Wadhams P.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 8 起始页码: 5912
结束页码: 5932
语种: 英语
英文关键词: attenuation rate
; directional spreading
; field observations
; ocean waves
; pancake ice
英文摘要: This paper investigates the attenuation and directional spreading of large amplitude waves traveling through pancake ice. Directional spectral density is analyzed from in situ wave buoy data collected during a 3-day storm event in October 2015 in the Beaufort Sea. Two proxy metrics for wave amplitude obtained from energy density spectra, namely, spectral amplitude and significant wave height, are used to track the waves as they propagate along transects through the array of buoys in the predominantly pancake ice field. Two types of wave buoys are used in the analysis and compared, exhibiting significant differences in the wave energy density and directionality estimates. Although exponential decay is observed predominantly, one of the two buoy types indicates a potential positive correlation between wave energy density and the occurrence of linear wave decay, as opposed to exponential decay, in accord with recent observations in the Antarctic marginal ice zone. Factors affecting the validity of this observation are discussed. An empirical power law with exponent 2.2 is also found to hold between the exponential attenuation coefficient and wave frequency. The directional content of the wave spectrum appears to decrease consistently along the wave transects, confirming that wave energy is being dissipated by the pancake ice as opposed to being scattered by ice cakes. ©2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113413
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mathematics and Statistics, University of Otago, Dunedin, New Zealand; Polar Scientific Ltd, Appin, United Kingdom; Applied Physics Laboratory, Civil and Environmental Engineering, University of Washington, Seattle, WA, United States; Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, United Kingdom
Recommended Citation:
Montiel F.,Squire V.A.,Doble M.,et al. Attenuation and Directional Spreading of Ocean Waves During a Storm Event in the Autumn Beaufort Sea Marginal Ice Zone[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(8)