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| Titel |
Intercomparison of the Charnock and COARE bulk wind stress formulations for coastal ocean modelling |
| VerfasserIn |
J. M. Brown, L. O. Amoudry, F. M. Mercier, A. J. Souza |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 9, no. 4 ; Nr. 9, no. 4 (2013-08-14), S.721-729 |
| Datensatznummer |
250085213
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| Publikation (Nr.) |
 copernicus.org/os-9-721-2013.pdf |
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| Zusammenfassung |
| The accurate parameterisation of momentum and heat transfer across the
air–sea interface is vital for realistic simulation of the atmosphere–ocean
system. In most modelling applications accurate representation of the wind
stress is required to numerically reproduce surge, coastal ocean
circulation, surface waves, turbulence and mixing. Different formulations
can be implemented and impact the accuracy of the instantaneous and
long-term residual circulation, the surface mixed layer, and the generation
of wave-surge conditions. This, in turn, affects predictions of storm
impact, sediment pathways, and coastal resilience to climate change. The
specific numerical formulation needs careful selection to ensure the
accuracy of the simulation. Two wind stress parameterisations widely used in
the ocean circulation and the storm surge communities respectively are
studied with focus on an application to the NW region of the UK.
Model–observation validation is performed at two nearshore and one estuarine
ADCP (acoustic Doppler current profiler) stations in Liverpool Bay, a hypertidal region of freshwater influence
(ROFI) with vast intertidal areas. The period of study covers both calm and
extreme conditions to test the robustness of the 10 m wind stress component
of the Coupled Ocean–Atmosphere Response Experiment (COARE) bulk formulae
and the standard Charnock relation. In this coastal application a realistic
barotropic–baroclinic simulation of the circulation and surge elevation is
set-up, demonstrating greater accuracy occurs when using the Charnock
relation, with a constant Charnock coefficient of 0.0185, for surface wind
stress during this one month period. |
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