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DOI | 10.1029/2018GL080183 |
Modification of Parametric Subharmonic Instability in the Presence of Background Geostrophic Currents | |
Yang, Wei1,2,3; Hibiya, Toshiyuki2; Tanaka, Yuki2; Zhao, Liang4; Wei, Hao3 | |
2018-12-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:23页码:12957-12962 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Japan |
英文摘要 | Although various numerical experiments have been carried out to investigate the cascade of internal tide energy associated with parametric subharmonic instability (PSI), most of them assume idealized oceanic situations, ignoring the existence of background relative vorticity (zeta). Here we show, for the first time, that the existence of zeta can significantly modify the behavior of PSI by changing the local effective Coriolis frequency (f(eff) = f + zeta/2). A set of numerical experiments for 25.4 degrees N show that the PSI efficiency significantly increases at the position where positive zeta shifts f(eff) close to the M-1 critical frequency (omega = omega(M1)). Furthermore, numerical experiments for 31 degrees N, poleward of the M-1 critical latitude, show that significant PSI energy transfer is possible when negative zeta is low enough. The presented results provide important implications for understanding the spatial distribution of diapycnal mixing in the ocean where background geostrophic currents prevail. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000454296600035 |
WOS关键词 | INTERNAL TIDE ; ENERGY-TRANSFER ; WAVES ; GENERATION ; OCEAN ; MODEL |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25820 |
专题 | 气候变化 |
作者单位 | 1.Ocean Univ China, Minist Educ China, Lab Phys Oceanog, Qingdao, Peoples R China; 2.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Tokyo, Japan; 3.Tianjin Univ, Sch Marine Sci & Technol, Tianjin, Peoples R China; 4.Tianjin Univ Sci & Technol, Coll Marine & Environm Sci, TEDA, Tianjin, Peoples R China |
推荐引用方式 GB/T 7714 | Yang, Wei,Hibiya, Toshiyuki,Tanaka, Yuki,et al. Modification of Parametric Subharmonic Instability in the Presence of Background Geostrophic Currents[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(23):12957-12962. |
APA | Yang, Wei,Hibiya, Toshiyuki,Tanaka, Yuki,Zhao, Liang,&Wei, Hao.(2018).Modification of Parametric Subharmonic Instability in the Presence of Background Geostrophic Currents.GEOPHYSICAL RESEARCH LETTERS,45(23),12957-12962. |
MLA | Yang, Wei,et al."Modification of Parametric Subharmonic Instability in the Presence of Background Geostrophic Currents".GEOPHYSICAL RESEARCH LETTERS 45.23(2018):12957-12962. |
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