DOI: 10.1029/2018JC013753
Scopus记录号: 2-s2.0-85051085058
论文题名: Near-Inertial Waves and Their Underlying Mechanisms Based on the South China Sea Internal Wave Experiment (2010–2011)
作者: Cao A. ; Guo Z. ; Song J. ; Lv X. ; He H. ; Fan W.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 7 起始页码: 5026
结束页码: 5040
语种: 英语
英文关键词: near-inertial waves
; parametric subharmonic instability
; South China Sea
; typhoon
英文摘要: Based on mooring array data from the South China Sea (SCS) Internal Wave Experiment, in this paper, five burst events of near-inertial waves (NIWs) in the northern SCS that occurred during August 2010 to April 2011 are reported. Among these NIWs, three were induced by typhoons Lionrock, Meranti, and Megi in 2010. Due to the differences in typhoon characteristics, mooring measuring ranges, distances between typhoon centers and moorings, and local conditions, the NIWs induced by the three typhoons show various intensities and structures at all three moorings. An interesting phenomenon is that the weaker typhoon Meranti generates stronger NIWs than the stronger typhoon Megi, which is largely due to the larger translation speed of Meranti. The e-folding time of near-inertial variance suggests that the damping of typhoon-induced NIWs is related to local conditions. In addition to the typhoon-induced NIWs, two NIW burst events were found in December 2010 and March 2011 at one mooring; however, these events were absent from the two adjacent moorings. Through analysis, we ruled out the local winds, lateral propagation, and parametric subharmonic instability as the causes of these NIWs. Although the real mechanisms remain unknown, the NIWs that occurred in December 2010 and March 2011 exhibit different features from the typhoon-induced NIWs. First, these NIWs have larger vertical wave numbers and smaller wavelengths than the typhoon-induced NIWs. Second, these NIWs can cause intense shear in deep water, whereas intense shear of typhoon-induced NIWs mainly exist in the upper ocean (approximately 150–200 m). ©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/113635
Appears in Collections: 气候减缓与适应
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作者单位: Ocean College, Zhejiang University, Zhoushan, China; Physical Oceanography Laboratory, Qingdao Collaborative Innovation Center of Marine Science and Technology (CIMST), Ocean University of China, and Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou, China
Recommended Citation:
Cao A.,Guo Z.,Song J.,et al. Near-Inertial Waves and Their Underlying Mechanisms Based on the South China Sea Internal Wave Experiment (2010–2011)[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(7)