Effects of lateral processes on the seasonal water stratification of the Gulf of Finland: 3-D NEMO-based model study
This paper aims to fill the gaps in knowledge of processes affecting the seasonal water stratification in the Gulf of Finland (GOF). We used a state-of-the-art modelling framework NEMO (Nucleus for European Modelling of the Ocean) designed for oceanographic research, operational oceanography, season...
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doaj-13462783894b484d9fd95119793b60012020-11-25T01:40:40ZengCopernicus PublicationsOcean Science1812-07841812-07922016-08-01124987100110.5194/os-12-987-2016Effects of lateral processes on the seasonal water stratification of the Gulf of Finland: 3-D NEMO-based model studyR. E. Vankevich0E. V. Sofina1T. E. Eremina2V. A. Ryabchenko3M. S. Molchanov4A. V. Isaev5Russian State Hydrometeorological University, Saint Petersburg, RussiaRussian State Hydrometeorological University, Saint Petersburg, RussiaRussian State Hydrometeorological University, Saint Petersburg, RussiaThe St. Petersburg Branch of the P.P.Shirshov Institute of Oceanology of the Russian Academy of Sciences, Saint Petersburg, RussiaRussian State Hydrometeorological University, Saint Petersburg, RussiaRussian State Hydrometeorological University, Saint Petersburg, RussiaThis paper aims to fill the gaps in knowledge of processes affecting the seasonal water stratification in the Gulf of Finland (GOF). We used a state-of-the-art modelling framework NEMO (Nucleus for European Modelling of the Ocean) designed for oceanographic research, operational oceanography, seasonal forecasting, and climate studies to build an eddy-resolving model of the GOF. To evaluate the model skill and performance, two different solutions were obtained on 0.5 km eddy-resolving and commonly used 2 km grids for a 1-year simulation. We also explore the efficacy of non-hydrostatic effect (convection) parameterizations available in NEMO for coastal application. It is found that the solutions resolving submesoscales have a more complex mixed layer structure in the regions of the GOF directly affected by the upwelling/downwelling and intrusions from the open Baltic Sea. Presented model estimations of the upper mixed layer depth are in good agreement with in situ CTD (BED) data. A number of model sensitivity tests to the vertical mixing parameterization confirm the model's robustness. Further progress in the submesoscale process simulation and understanding is apparently not connected mainly with the finer resolution of the grids, but with the use of non-hydrostatic models because of the failure of the hydrostatic approach at submesoscale.http://www.ocean-sci.net/12/987/2016/os-12-987-2016.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
R. E. Vankevich E. V. Sofina T. E. Eremina V. A. Ryabchenko M. S. Molchanov A. V. Isaev |
spellingShingle |
R. E. Vankevich E. V. Sofina T. E. Eremina V. A. Ryabchenko M. S. Molchanov A. V. Isaev Effects of lateral processes on the seasonal water stratification of the Gulf of Finland: 3-D NEMO-based model study Ocean Science |
author_facet |
R. E. Vankevich E. V. Sofina T. E. Eremina V. A. Ryabchenko M. S. Molchanov A. V. Isaev |
author_sort |
R. E. Vankevich |
title |
Effects of lateral processes on the seasonal water stratification
of the Gulf of Finland: 3-D NEMO-based model study |
title_short |
Effects of lateral processes on the seasonal water stratification
of the Gulf of Finland: 3-D NEMO-based model study |
title_full |
Effects of lateral processes on the seasonal water stratification
of the Gulf of Finland: 3-D NEMO-based model study |
title_fullStr |
Effects of lateral processes on the seasonal water stratification
of the Gulf of Finland: 3-D NEMO-based model study |
title_full_unstemmed |
Effects of lateral processes on the seasonal water stratification
of the Gulf of Finland: 3-D NEMO-based model study |
title_sort |
effects of lateral processes on the seasonal water stratification
of the gulf of finland: 3-d nemo-based model study |
publisher |
Copernicus Publications |
series |
Ocean Science |
issn |
1812-0784 1812-0792 |
publishDate |
2016-08-01 |
description |
This paper aims to fill the gaps in knowledge of processes affecting the
seasonal water stratification in the Gulf of Finland (GOF). We used a
state-of-the-art modelling framework NEMO (Nucleus for European Modelling of
the Ocean) designed for oceanographic research, operational oceanography,
seasonal forecasting, and climate studies to build an eddy-resolving model of
the GOF. To evaluate the model skill and performance, two different solutions
were obtained on 0.5 km eddy-resolving and commonly used 2 km grids for a
1-year simulation. We also explore the efficacy of non-hydrostatic effect
(convection) parameterizations available in NEMO for coastal application. It
is found that the solutions resolving submesoscales have a more complex mixed
layer structure in the regions of the GOF directly affected by the
upwelling/downwelling and intrusions from the open Baltic Sea. Presented
model estimations of the upper mixed layer depth are in good agreement with
in situ CTD (BED) data. A number of model sensitivity tests to the vertical
mixing parameterization confirm the model's robustness. Further progress in
the submesoscale process simulation and understanding is apparently not
connected mainly with the finer resolution of the grids, but with the use of
non-hydrostatic models because of the failure of the hydrostatic approach at
submesoscale. |
url |
http://www.ocean-sci.net/12/987/2016/os-12-987-2016.pdf |
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