An eddifying Stommel model: fast eddy effects in a two-box ocean
An eddifying Stommel model: fast eddy effects in a two-box ocean
复制标题
令人陶醉的斯托梅尔模型:两箱海洋中的快速涡流效应
DOI:
10.1080/03091929.2018.1464566
复制
发表时间:
2018
影响因子:
1.3
通讯作者:
Grooms, Ian
中科院分区:
文献类型:
--
作者:
Barham, William;Grooms, Ian
A system of stochastic differential equations is formulated describing the heat and salt content of a two-box ocean. Variability in the heat and salt content and in the thermohaline circulation between the boxes is driven by fast Gaussian atmospheric forcing and by ocean-intrinsic, eddy-driven variability. The eddy forcing of the slow dynamics takes the form of a colored, non-Gaussian noise. The qualitative effects of this non-Gaussianity are investigated by comparing to two approximate models: one that includes only the mean eddy effects (the “averaged model”), and one that includes an additional Gaussian white-noise approximation of the eddy effects (the “Gaussian model”). Both of these approximate models are derived using the methods of fast averaging and homogenisation. In the parameter regime where the dynamics has a single stable equilibrium the averaged model has too little variability. The Gaussian model has accurate second-order statistics, but incorrect skew and rare-event probabilities. In the parameter regime where the dynamics has two stable equilibria the eddy noise is much smaller than the atmospheric noise. The averaged, Gaussian, and non-Gaussian models all have similar stationary distributions, but the jump rates between equilibria are too small for the averaged and Gaussian models.
登录
查看更多内容
DOI:
10.1098/rspa.2017.0388
发表时间:
2017-09
期刊:
Proceedings. Mathematical, physical, and engineering sciences
影响因子:
--
作者:
Cotter CJ;Gottwald GA;Holm DD
通讯作者:
Holm DD
影响因子:
3.2
作者:
M. Andrejczuk;F. Cooper;S. Juricke;T. Palmer;A. Weisheimer;L. Zanna
通讯作者:
M. Andrejczuk;F. Cooper;S. Juricke;T. Palmer;A. Weisheimer;L. Zanna
影响因子:
3.2
作者:
Hirschi J
通讯作者:
Hirschi J
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
F. Cooper
通讯作者:
F. Cooper
影响因子:
3.2
作者:
I. Grooms
通讯作者:
I. Grooms