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DOI | 10.1002/2017GL076939 |
Can Large Oceanic Vortices Be Stable? | |
Benilov, E. S. | |
2018-02-28 | |
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:4页码:1948-1954 |
文章类型 | Article |
语种 | 英语 |
国家 | Ireland |
英文摘要 | Observations show that radii of oceanic eddies often exceed the Rossby radius of deformation, whereas theoretical studies suggest that such vortices should be unstable. The present paper resolves this paradox by presenting a wide class of large geostrophic vortices with a sign-definite gradient of potential vorticity (which makes them stable), in an ocean where the density gradient is mostly confined to a thin near-surface layer (which is indeed the case in the real ocean). The condition of a thin "active" layer is what makes the present work different from the previous theoretical studies and is of utmost importance. It turns out that without it, the joint requirement that a vortex be large and have a sign-definite potential vorticity gradient trivializes the problem by eliminating all vortices except nearly barotropic ones. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427564300029 |
WOS关键词 | 2-LAYER OCEAN ; GULF-STREAM ; STABILITY ; RINGS ; INSTABILITY ; AGEOSTROPHY ; VORTEX ; LAYER ; FLOW |
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/26869 |
专题 | 气候变化 |
作者单位 | Univ Limerick, Dept Math & Stat, Limerick, Ireland |
推荐引用方式 GB/T 7714 | Benilov, E. S.. Can Large Oceanic Vortices Be Stable?[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(4):1948-1954. |
APA | Benilov, E. S..(2018).Can Large Oceanic Vortices Be Stable?.GEOPHYSICAL RESEARCH LETTERS,45(4),1948-1954. |
MLA | Benilov, E. S.."Can Large Oceanic Vortices Be Stable?".GEOPHYSICAL RESEARCH LETTERS 45.4(2018):1948-1954. |
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