Publication Date:
2021-01-14
Description:
The sensitivity of the dynamics of the Mediterranean
Sea to atmospheric pressure and free surface elevation
formulation using NEMO (Nucleus for European Modelling
of the Ocean) was evaluated. Four different experiments were
carried out in the Mediterranean Sea using filtered or explicit
free surface numerical schemes and accounting for the effect
of atmospheric pressure in addition to wind and buoyancy
fluxes. Model results were evaluated by coherency and power
spectrum analysis with tide gauge data. We found that atmospheric
pressure plays an important role for periods shorter
than 100 days. The free surface formulation is important to
obtain the correct ocean response for periods shorter than
30 days. At frequencies higher than 15 days1 the Mediterranean
basin’s response to atmospheric pressure was not coherent
and the performance of the model strongly depended
on the specific area considered. A large-amplitude seasonal
oscillation observed in the experiments using a filtered free
surface was not evident in the corresponding explicit free surface
formulation case, which was due to a phase shift between
mass fluxes in the Gibraltar Strait and at the surface.
The configuration with time splitting and atmospheric pressure
always performed best; the differences were enhanced
at very high frequencies.
Description:
Published
Description:
3001–3015
Description:
4A. Oceanografia e clima
Description:
JCR Journal
Keywords:
Ocean circulation numerical modelling
;
Atmospheric forcing
;
Sea surface height
;
numerical schemes
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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