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DOI | 10.1002/2017GL074191 |
Anticyclonic precession of a plume in a rotating environment | |
Frank, D.1; Landel, J. R.2; Dalziel, S. B.1; Linden, P. F.1 | |
2017-09-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:18 |
文章类型 | Article |
语种 | 英语 |
国家 | England |
英文摘要 | Motivated by potential effects of the Earth's rotation on the Deepwater Horizon oil plume, we conducted laboratory experiments on saltwater point plumes in a homogeneous rotating environment across a wide range of Rossby numbers 0.02 <= Ro <= 1.3. We report a striking physical instability in the plume dynamics near the source: after approximately one rotation period, the plume tilts laterally and starts to precess anticyclonically. The mean precession frequency.. (omega) over bar scales linearly with the rotation rate Omega as.. (omega) over bar approximate to 0.4 Omega. We find no evidence of a critical Rossby number above which precession ceases. We infer that a conventionally defined Rossby number is not an appropriate parameter when the plume is maintained over a long time: provided Omega not equal 0, rotation is always important to the dynamics. This indicates that precession may occur in persistent oceanic or atmospheric plumes even at low latitudes. |
英文关键词 | Deepwater Horizon oil spill plumes rotating environment |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000413148100035 |
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/26890 |
专题 | 气候变化 |
作者单位 | 1.Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge, England; 2.Univ Manchester, Sch Math, Manchester, Lancs, England |
推荐引用方式 GB/T 7714 | Frank, D.,Landel, J. R.,Dalziel, S. B.,et al. Anticyclonic precession of a plume in a rotating environment[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(18). |
APA | Frank, D.,Landel, J. R.,Dalziel, S. B.,&Linden, P. F..(2017).Anticyclonic precession of a plume in a rotating environment.GEOPHYSICAL RESEARCH LETTERS,44(18). |
MLA | Frank, D.,et al."Anticyclonic precession of a plume in a rotating environment".GEOPHYSICAL RESEARCH LETTERS 44.18(2017). |
条目包含的文件 | 条目无相关文件。 |
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