The propagation and decay of a coastal vortex on a shelf
The propagation and decay of a coastal vortex on a shelf
复制标题
陆架上海岸涡的传播和衰减
DOI:
10.1017/jfm.2021.790
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发表时间:
2021
影响因子:
3.7
通讯作者:
Crowe M
中科院分区:
文献类型:
--
作者:
Crowe M
A coastal eddy is modelled as a barotropic vortex propagating along a coastal shelf. If the vortex speed matches the phase speed of any coastal trapped shelf wave modes, a shelf wave wake is generated leading to a flux of energy from the vortex into the wave field. Using a simple shelf geometry, we determine analytic expressions for the wave wake and the leading-order flux of wave energy. By considering the balance of energy between the vortex and wave field, this energy flux is then used to make analytic predictions for the evolution of the vortex speed and radius under the assumption that the vortex structure remains self-similar. These predictions are examined in the asymptotic limit of small rotation rate and shelf slope and tested against numerical simulations. If the vortex speed does not match the phase speed of any shelf wave, steady vortex solutions are expected to exist. We present a numerical approach for finding these nonlinear solutions and examine the parameter dependence of their structure.
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DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
C. Marez;X. Carton;Mathieu Morvan;J. Reinaud
通讯作者:
J. Reinaud
影响因子:
3.7
作者:
Crowe M
通讯作者:
Crowe M
DOI:
10.1098/rspa.1956.0007
发表时间:
1956
期刊:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
影响因子:
--
作者:
L. Fraenkel
通讯作者:
L. Fraenkel
DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
E. Johnson
通讯作者:
E. Johnson
影响因子:
2.3
作者:
Johnson E
通讯作者:
Johnson E