气候变化领域集成服务门户(CCPortal): Spurious Rollover of Wave Attenuation Rates in Sea Ice Caused by Noise in Field Measurements

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DOI	10.1029/2020JC016606
	Spurious Rollover of Wave Attenuation Rates in Sea Ice Caused by Noise in Field Measurements
	Thomson J.; Hošeková L.; Meylan M.H.; Kohout A.L.; Kumar N.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	The effects of instrument noise on estimating the spectral attenuation rates of ocean waves in sea ice are explored using synthetic observations in which the true attenuation rates are known explicitly. The spectral shape of the energy added by noise, relative to the spectral shape of the true wave energy, is the critical aspect of the investigation. A negative bias in attenuation that grows in frequency is found across a range of realistic parameters. This negative bias decreases the observed attenuation rates at high frequencies, such that it can explain the rollover effect commonly reported in field studies of wave attenuation in sea ice. The published results from five field experiments are evaluated in terms of the noise bias, and a spurious rollover (or flattening) of attenuation is found in all cases. Remarkably, the wave heights are unaffected by the noise bias, because the noise bias occurs at frequencies that contain only a small fraction of the total energy. © 2021. The Authors.
英文关键词	attenuation rates; ocean waves; sea ice
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186446
作者单位	Applied Physics Laboratory, University of Washington, Seattle, WA, United States; Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, United States; Department of Meteorology, University of Reading, Reading, United Kingdom; School of Mathematical and Physical Sciences, The University of Newcastle, Callaghan, NSW, Australia; National Institute of Water and Atmospheric Research, Christchurch, New Zealand
推荐引用方式 GB/T 7714	Thomson J.,Hošeková L.,Meylan M.H.,et al. Spurious Rollover of Wave Attenuation Rates in Sea Ice Caused by Noise in Field Measurements[J],2021,126(3).
APA	Thomson J.,Hošeková L.,Meylan M.H.,Kohout A.L.,&Kumar N..(2021).Spurious Rollover of Wave Attenuation Rates in Sea Ice Caused by Noise in Field Measurements.Journal of Geophysical Research: Oceans,126(3).
MLA	Thomson J.,et al."Spurious Rollover of Wave Attenuation Rates in Sea Ice Caused by Noise in Field Measurements".Journal of Geophysical Research: Oceans 126.3(2021).