DOI: 10.1002/2017JC013389
Scopus记录号: 2-s2.0-85042227669
论文题名: SAR Observation and Numerical Simulation of Internal Solitary Wave Refraction and Reconnection Behind the Dongsha Atoll
作者: Jia T. ; Liang J.J. ; Li X.-M. ; Sha J.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 74
结束页码: 89
语种: 英语
英文关键词: Dongsha Atoll
; internal wave
; numerical simulation
; reconnection
; refraction
; SAR observation
Scopus关键词: atoll
; Envisat
; internal wave
; model
; numerical model
; observational method
; refraction
; solitary wave
; stratification
; synthetic aperture radar
; TerraSAR-X
; wave propagation
; China
; Dongshan
; Fujian
; Pacific Ocean
; South China Sea
英文摘要: The refraction and reconnection of internal solitary waves (ISWs) around the Dongsha Atoll (DSA) in the northern South China Sea (SCS) are investigated based on spaceborne synthetic aperture radar (SAR) observations and numerical simulations. In general, a long ISW front propagating from the deep basin of the northern SCS splits into northern and southern branches when it passes the DSA. In this study, the statistics of Envisat Advanced SAR (ASAR) images show that the northern and southern wave branches can reconnect behind the DSA, but the reconnection location varies. A previously developed nonlinear refraction model is set up to simulate the refraction and reconnection of the ISWs behind the DSA, and the model is used to evaluate the effects of ocean stratification, background currents, and incoming ISW characteristics at the DSA on the variation in reconnection locations. The results of the first realistic simulation agree with consecutive TerraSAR-X (TSX) images captured within 12 h of each other. Further sensitivity simulations show that ocean stratification, background currents, and initial wave amplitudes all affect the phase speeds of wave branches and therefore shift their reconnection locations while shapes and locations of incoming wave branches upstream of the DSA profoundly influence the subsequent propagation paths. This study clarifies the variation in reconnection locations of ISWs downstream of the DSA and reveals the important mechanisms governing the reconnection process, which can improve our understanding of the propagation of ISWs near the DSA. © 2017. 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/114848
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Hainan Key Laboratory of Earth Observation, Sanya, China
Recommended Citation:
Jia T.,Liang J.J.,Li X.-M.,et al. SAR Observation and Numerical Simulation of Internal Solitary Wave Refraction and Reconnection Behind the Dongsha Atoll[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)