Global seamless tidal simulation using a 3D unstructured-grid model (SCHISM v5.10.0)
<p>We present a new 3D unstructured-grid global ocean model to study both tidal and nontidal processes, with a focus on the total water elevation. Unlike existing global ocean models, the new model resolves estuaries and rivers down to <span class="inline-formula">∼8</span&g...
| Published in: | Geoscientific Model Development |
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| Main Authors: | , , , , , |
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2023-05-01
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| Online Access: | https://gmd.copernicus.org/articles/16/2565/2023/gmd-16-2565-2023.pdf |
| Summary: | <p>We present a new 3D unstructured-grid global ocean model
to study both tidal and nontidal processes, with a focus on the total water
elevation. Unlike existing global ocean models, the new model resolves
estuaries and rivers down to <span class="inline-formula">∼8</span> m without the need for grid
nesting. The model is validated with both satellite and in situ observations
for elevation, temperature, and salinity. Tidal elevation solutions have a
mean complex root-mean-square
error (RMSE) of 4.2 cm for M2 and 5.4 cm for all five major constituents
in the deep ocean. The RMSEs for the other four constituents, S2, N2, K1, and O1,
are, respectively, 2.05, 0.93, 2.08, and 1.34 cm). The nontidal residual
assessed by a tide gauge dataset (GESLA) has a mean RMSE of 7 cm. For the
first time ever, we demonstrate the potential for seamless simulation on a
single mesh from the global ocean into several estuaries along the US West
Coast. The model is able to accurately capture the total elevation, even at
some upstream stations. The model can therefore potentially serve as the
backbone of a global tide surge and compound flooding forecasting framework.</p> |
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| ISSN: | 1991-959X 1991-9603 |