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...
Main Authors: | , , , , , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2016-08-01
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Series: | Ocean Science |
Online Access: | http://www.ocean-sci.net/12/987/2016/os-12-987-2016.pdf |
Summary: | 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. |
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ISSN: | 1812-0784 1812-0792 |