IOCAS-IR  > 海洋环流与波动重点实验室
The evolution of mode-2 internal solitary waves modulated by background shear currents
Zhang, Peiwen1,3,4; Xu, Zhenhua1,2,3,4; Li, Qun5; Yin, Baoshu1,2,3,4; Hou, Yijun1,2,3,4; Liu, Antony K.6
2018-06-25
Source PublicationNONLINEAR PROCESSES IN GEOPHYSICS
ISSN1023-5809
Volume25Issue:2Pages:441-455
Corresponding AuthorXu, Zhenhua(xuzhenhua@qdio.ac.cn) ; Li, Qun(liqun@pric.org.cn)
AbstractThe evolution of mode-2 internal solitary waves (ISWs) modulated by background shear currents was investigated numerically. The mode-2 ISW was generated by the "lock-release" method, and the background shear current was initialized after the mode-2 ISW became stable. Five sets of experiments were conducted to assess the sensitivity of the modulation process to the direction, polarity, magnitude, shear layer thickness and offset extent of the background shear current. Three distinctly different shear-induced waves were identified as a forward-propagating long wave, oscillating tail and amplitude-modulated wave packet in the presence of a shear current. The amplitudes of the forward-propagating long wave and the amplitude-modulated wave packet are proportional to the magnitude of the shear but inversely proportional to the thickness of the shear layer, as well as the energy loss of the mode-2 ISW during modulation. The oscillating tail and amplitude-modulated wave packet show symmetric variation when the background shear current is offset upward or downward, while the forward propagating long wave was insensitive to it. For comparison, one control experiment was configured according to the observations of Shroyer et al. (2010); in the first 30 periods, similar to 36% of total energy was lost at an average rate of 9Wm 1 in the presence of the shear current; it would deplete the energy of initial mode(-2) ISWs in similar to 4.5 h, corresponding to a propagation distance of similar to 5 km, which is consistent with in situ data.
DOI10.5194/npg-25-441-2018
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC1401404] ; National Key Research and Development Program of China[2017YFA0604102] ; QNLM[2016ASKJ12] ; National Natural Science Foundation of China[41528601] ; National Natural Science Foundation of China[41676006] ; National Natural Science Foundation of China[41421005] ; National Natural Science Foundation of China[41576189] ; Youth Innovation Promotion Association, CAS ; CAS Interdisciplinary Innovation Team Oceanic Mesoscale Processes and Ecology Effects ; Key Research Program of Frontier Science, CAS[QYZDB-SSW-DQC024] ; Strategic Pioneering Research Program of CAS[XDA11020104] ; Strategic Pioneering Research Program of CAS[XDA11020101] ; High Performance Computing Center at the IOCAS
WOS Research AreaGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS SubjectGeochemistry & Geophysics ; Meteorology & Atmospheric Sciences
WOS IDWOS:000436122200001
PublisherCOPERNICUS GESELLSCHAFT MBH
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/159478
Collection海洋环流与波动重点实验室
Corresponding AuthorXu, Zhenhua; Li, Qun
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
5.Polar Res Inst China, Shanghai 200136, Peoples R China
6.Ocean Univ China, Qingdao 266100, Peoples R China
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Peiwen,Xu, Zhenhua,Li, Qun,et al. The evolution of mode-2 internal solitary waves modulated by background shear currents[J]. NONLINEAR PROCESSES IN GEOPHYSICS,2018,25(2):441-455.
APA Zhang, Peiwen,Xu, Zhenhua,Li, Qun,Yin, Baoshu,Hou, Yijun,&Liu, Antony K..(2018).The evolution of mode-2 internal solitary waves modulated by background shear currents.NONLINEAR PROCESSES IN GEOPHYSICS,25(2),441-455.
MLA Zhang, Peiwen,et al."The evolution of mode-2 internal solitary waves modulated by background shear currents".NONLINEAR PROCESSES IN GEOPHYSICS 25.2(2018):441-455.
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