Asymptotic scale-dependent stability of surface quasi-geostrophic vortices: semi-analytic results
Asymptotic scale-dependent stability of surface quasi-geostrophic vortices: semi-analytic results
复制标题
表面准地转涡旋的渐近尺度相关稳定性:半解析结果
DOI:
10.1080/03091929.2018.1453930
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发表时间:
2019
影响因子:
1.3
通讯作者:
F.J. Poulin
中科院分区:
文献类型:
--
作者:
G. Badin;F.J. Poulin
The scale-dependent stability of surface quasi-geostrophic (SQG) vortices is studied both analytically and numerically. In particular, we study the sensitivity of the stability of SQG vortices on a nondimensional number, namely the square root of the Burger number, which sets the transition scale between different dynamical regimes corresponding to local and nonlocal dynamics. We analyse the stability of two different examples. The first example is given by a Rankine vortex, characterised by constant buoyancy. For this case, asymptotic analysis suggests that the frequencies of the perturbations at scales smaller than the transition scale show adependence. At scales larger than the transition scale, the frequencies scale instead like. The second example consists of a Rankine vortex shielded by a filament characterised by a different value of constant buoyancy. For this example we study the dispersion relation for the perturbations for the cases in which the inner vortex and the outer filament have different asymptotic properties behaviour.
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影响因子:
3.7
作者:
G. Flierl
通讯作者:
G. Flierl
影响因子:
1.3
作者:
C. Lim;A. Majda
通讯作者:
A. Majda
影响因子:
2.9
作者:
C. K. Taylor;Stefan G. Llewellyn Smith
通讯作者:
Stefan G. Llewellyn Smith
影响因子:
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作者:
J. Reinaud;D. Dritschel;X. Carton
通讯作者:
X. Carton
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Benjamin J. Harvey;M. Ambaum
通讯作者:
M. Ambaum