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| Titel |
Modelling temperature and salinity in Liverpool Bay and the Irish Sea: sensitivity to model type and surface forcing |
| VerfasserIn |
C. K. O'Neill, J. A. Polton, J. T. Holt, E. J. O'Dea |
| 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 ; 8, no. 5 ; Nr. 8, no. 5 (2012-10-29), S.903-913 |
| Datensatznummer |
250005877
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| Publikation (Nr.) |
 copernicus.org/os-8-903-2012.pdf |
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| Zusammenfassung |
Three shelf sea models are compared against observed surface temperature and
salinity in Liverpool Bay and the Irish Sea: a 7 km NEMO (Nucleus for
European Modelling of the Ocean) model, and 12 km
and 1.8 km POLCOMS (Proudman Oceanographic Laboratory Coastal Ocean Modelling System) models. Each model is run with two different surface
forcing datasets of different resolutions.
Comparisons with a variety of observations from the Liverpool Bay Coastal
Observatory show that increasing the surface forcing resolution improves the
modelled surface temperature in all the models, in particular reducing the
summer warm bias and winter cool bias. The response of surface salinity is
more varied with improvements in some areas and deterioration in others.
The 7 km NEMO model performs as well as the 1.8 km POLCOMS model when
measured by overall skill scores, although the sources of error in the models
are different. NEMO is too weakly stratified in Liverpool Bay, whereas
POLCOMS is too strongly stratified. The horizontal salinity gradient, which
is too strong in POLCOMS, is better reproduced by NEMO which uses a more
diffusive horizontal advection scheme. This leads to improved semi-diurnal
variability in salinity in NEMO at a mooring site located in the Liverpool
Bay ROFI (region of freshwater influence) area. |
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