Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange
Purpose. The main goal of the work is to advance the ocean general circulation model by improving description of the processes of vertical turbulent exchange of heat, salt and momentum which significantly affect quality of reproducing the ocean circulation and thermohaline structure using the models...
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Federal State Budget Scientific Institution «Marine Hydrophysical Institute of RAS»
2019
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ftdoajarticles:oai:doaj.org/article:53518c0b114e4e398f676cf60595aac3 2023-05-15T15:00:55+02:00 Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange V.B. Zalesny S.N. Moshonkin V.L. Perov A.V. Gusev 2019-12-01T00:00:00Z https://doi.org/10.22449/1573-160X-2019-6-455-466 https://doaj.org/article/53518c0b114e4e398f676cf60595aac3 EN eng Federal State Budget Scientific Institution «Marine Hydrophysical Institute of RAS» http://physical-oceanography.ru/repository/2019/6/en_201906_01.pdf https://doaj.org/toc/1573-160X doi:10.22449/1573-160X-2019-6-455-466 1573-160X https://doaj.org/article/53518c0b114e4e398f676cf60595aac3 Physical Oceanography, Vol 26, Iss 6, Pp 455-466 (2019) ocean circulation k-omega parameterization k-epsilon parameterization splitting method vertical turbulent exchange north atlantic Oceanography GC1-1581 article 2019 ftdoajarticles https://doi.org/10.22449/1573-160X-2019-6-455-466 2023-01-08T01:39:19Z Purpose. The main goal of the work is to advance the ocean general circulation model by improving description of the processes of vertical turbulent exchange of heat, salt and momentum which significantly affect quality of reproducing the ocean circulation and thermohaline structure using the models based on a system of the ocean hydrothermodynamics primitive equations. Methods and Results. The main instrument of the research is the sigma model of the oceanic and marine circulation developed at the Marchuk Institute of Numerical Mathematics, RAS. In the incompressibility, hydrostatics and Boussinesq approximations, the system of equations is supplemented with the k - ω and k - ε parameterizations of the vertical turbulent exchange, the equations for which are solved by the splitting method applied to the physical processes. The equations are split into the stages describing transport-diffusion of the turbulence characteristics and their generation-dissipation. At the generation-dissipation stage, the equations for turbulent characteristics are solved analytically. At that, the stability functions resulted from application of the spectral algorithm are used. To assess quality of two parameterizations of the vertical turbulent exchange, the North Atlantic–Arctic Ocean circulation is numerically simulated and the upper ocean layer characteristics are studied. Conclusions. It is shown that the structure of the North Atlantic–Arctic Ocean large-scale fields is sensitive to choice of the vertical turbulence models. In particular, application of the k - ε parameterization is accompanied by a noticeably higher rate of involvement of the seasonal pycnocline waters in the developed turbulence zone than that resulting from application of the k - ω parameterization. Article in Journal/Newspaper Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic North Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Physical Oceanography 26 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean circulation k-omega parameterization k-epsilon parameterization splitting method vertical turbulent exchange north atlantic Oceanography GC1-1581 |
spellingShingle |
ocean circulation k-omega parameterization k-epsilon parameterization splitting method vertical turbulent exchange north atlantic Oceanography GC1-1581 V.B. Zalesny S.N. Moshonkin V.L. Perov A.V. Gusev Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
topic_facet |
ocean circulation k-omega parameterization k-epsilon parameterization splitting method vertical turbulent exchange north atlantic Oceanography GC1-1581 |
description |
Purpose. The main goal of the work is to advance the ocean general circulation model by improving description of the processes of vertical turbulent exchange of heat, salt and momentum which significantly affect quality of reproducing the ocean circulation and thermohaline structure using the models based on a system of the ocean hydrothermodynamics primitive equations. Methods and Results. The main instrument of the research is the sigma model of the oceanic and marine circulation developed at the Marchuk Institute of Numerical Mathematics, RAS. In the incompressibility, hydrostatics and Boussinesq approximations, the system of equations is supplemented with the k - ω and k - ε parameterizations of the vertical turbulent exchange, the equations for which are solved by the splitting method applied to the physical processes. The equations are split into the stages describing transport-diffusion of the turbulence characteristics and their generation-dissipation. At the generation-dissipation stage, the equations for turbulent characteristics are solved analytically. At that, the stability functions resulted from application of the spectral algorithm are used. To assess quality of two parameterizations of the vertical turbulent exchange, the North Atlantic–Arctic Ocean circulation is numerically simulated and the upper ocean layer characteristics are studied. Conclusions. It is shown that the structure of the North Atlantic–Arctic Ocean large-scale fields is sensitive to choice of the vertical turbulence models. In particular, application of the k - ε parameterization is accompanied by a noticeably higher rate of involvement of the seasonal pycnocline waters in the developed turbulence zone than that resulting from application of the k - ω parameterization. |
format |
Article in Journal/Newspaper |
author |
V.B. Zalesny S.N. Moshonkin V.L. Perov A.V. Gusev |
author_facet |
V.B. Zalesny S.N. Moshonkin V.L. Perov A.V. Gusev |
author_sort |
V.B. Zalesny |
title |
Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
title_short |
Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
title_full |
Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
title_fullStr |
Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
title_full_unstemmed |
Ocean Circulation Modeling with K-Omega and K-Epsilon Parameterizations of Vertical Turbulent Exchange |
title_sort |
ocean circulation modeling with k-omega and k-epsilon parameterizations of vertical turbulent exchange |
publisher |
Federal State Budget Scientific Institution «Marine Hydrophysical Institute of RAS» |
publishDate |
2019 |
url |
https://doi.org/10.22449/1573-160X-2019-6-455-466 https://doaj.org/article/53518c0b114e4e398f676cf60595aac3 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic North Atlantic |
genre_facet |
Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic North Atlantic |
op_source |
Physical Oceanography, Vol 26, Iss 6, Pp 455-466 (2019) |
op_relation |
http://physical-oceanography.ru/repository/2019/6/en_201906_01.pdf https://doaj.org/toc/1573-160X doi:10.22449/1573-160X-2019-6-455-466 1573-160X https://doaj.org/article/53518c0b114e4e398f676cf60595aac3 |
op_doi |
https://doi.org/10.22449/1573-160X-2019-6-455-466 |
container_title |
Physical Oceanography |
container_volume |
26 |
container_issue |
6 |
_version_ |
1766332965727502336 |