Fast and Accurate Computation of Vertical Modes
Fast and Accurate Computation of Vertical Modes
复制标题
快速、准确地计算垂直模态
DOI:
10.1029/2019ms001939
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发表时间:
2020
影响因子:
6.8
通讯作者:
Smith, K. Shafer
中科院分区:
文献类型:
--
作者:
Early, Jeffrey J.;Lelong, M. Pascale;Smith, K. Shafer
The vertical modes of linearized equations of motion are widely used by the oceanographic community in numerous theoretical and observational contexts. However, the standard approach for solving the generalized eigenvalue problem using second‐order finite difference matrices produces errors for all but the few lowest modes, and increasing resolution quickly becomes too slow as the computational complexity of eigenvalue algorithms increases as . Existing methods are therefore inadequate for computing a full spectrum of internal waves, such as needed for initializing a numerical model with a full internal wave spectrum. Here we show that rewriting the eigenvalue problem in stretched coordinates and projecting onto Chebyshev polynomials results in substantially more accurate modes than finite differencing at a fraction of the computational cost. We also compute the surface quasigeostrophic modes using the same methods. All spectral and finite difference algorithms are made available in a suite of Matlab classes that have been validated against known analytical solutions in constant and exponential stratification.
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DOI:
10.1137/1.9781611973525
发表时间:
2014-09
期刊:
--
影响因子:
--
作者:
J. Boyd
通讯作者:
J. Boyd
影响因子:
2.2
作者:
Early, Jeffrey J.;Sykulski, Adam M.
通讯作者:
Sykulski, Adam M.
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
Hai;E. Kunze
通讯作者:
E. Kunze
DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
K. Winters;E. D’Asaro
通讯作者:
E. D’Asaro
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
M. Dunphy
通讯作者:
M. Dunphy