DOI: 10.1029/2018JC013859
Scopus记录号: 2-s2.0-85050468130
论文题名: Spectral Characteristics of Gravity-Capillary Waves, With Connections to Wave Growth and Microbreaking
作者: Laxague N.J.M. ; Zappa C.J. ; LeBel D.A. ; Banner M.L.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 4576
结束页码: 4592
语种: 英语
英文关键词: gravity-capillary waves
; microbreaking
; short wave spectra
; wave growth
英文摘要: In order to improve our understanding of physical air-sea interaction, it is essential to better describe the short-scale ocean wave response to wind forcing. This is particularly true for waves which are small enough to evade observation by traditional buoy and point-based gauge measurements but large enough to appreciably alter the transfer of momentum between atmosphere and ocean. Such waves are restored to equilibrium both by the Earth's gravity and air-sea surface tension, hence the classification as “gravity-capillary.” Radar remote sensing techniques depend greatly upon these waves in order to extract useful physical parameters from afar. Despite this importance, field observations of gravity-capillary wave characteristics are uncommon and results vary from study to study. Furthermore, leading-edge model wave number spectra generally do not match each other in shape or important spectral parameters. Here we present an extended analysis of short wave data collected via a polarimetric camera aboard Research Platform Floating Instrument Platform in the Santa Barbara Channel. Our wave number saturation spectra show the emergence of a peak in the gravity-capillary subrange at low wind forcing magnitude (u*~0.045 m/s), consistent with critical wave growth in air side stability theory and previously only observed in the laboratory. Finally, the effects of microbreaking on wave spectral characteristics are discussed. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113656
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Ocean and Climate Physics Division, Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; School of Mathematics and Statistics, University of New South Wales-Sydney, Sydney, Australia
Recommended Citation:
Laxague N.J.M.,Zappa C.J.,LeBel D.A.,et al. Spectral Characteristics of Gravity-Capillary Waves, With Connections to Wave Growth and Microbreaking[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)