Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

High-Resolution Model of Clew Bay – Model Set-up and Validation Results

Version 1 : Received: 13 January 2023 / Approved: 16 January 2023 / Online: 16 January 2023 (13:06:24 CET)

A peer-reviewed article of this Preprint also exists.

Nagy, H.; Mamoutos, I.; Nolan, G.; Wilkes, R.; Dabrowski, T. High-Resolution Model of Clew Bay—Model Set-Up and Validation Results. J. Mar. Sci. Eng. 2023, 11, 362. Nagy, H.; Mamoutos, I.; Nolan, G.; Wilkes, R.; Dabrowski, T. High-Resolution Model of Clew Bay—Model Set-Up and Validation Results. J. Mar. Sci. Eng. 2023, 11, 362.

Abstract

Clew Bay is an important aquaculture production area in Ireland. In this study, we focused on a high-resolution simulation of the Clew Bay region based on a Regional Ocean Modelling System (ROMS). Freshwater discharges from eight rivers are included in the model and a wetting-drying scheme has been implemented. The Clew Bay model simulation was validated and calibrated with available observations (e.g., Acoustic Doppler Current Profilers (ADCP), vertical salinity and temperature profiles and tide gauge) in the geographic area of the model domain. High correlations were found between the model outputs and observed temperature, salinity and tide gauge water levels along with small Root Mean Square Errors. This indicates that the model was able to reproduce the oceanographic phenomena in the study area. The Taylor diagram analysis showed a high correlation coefficient (R=0.99) between the ADCP bottom temperature in the Inner Bay and the Clew Bay model, along with a small Centered Root Mean Square Error (RMSD =0.5 ◦ C). High correlation coefficients (R > 0.80) were found between the model and the two ADCPs for the zonal current component. There was a resemblance in structure between the model and the observed salinity profiles, indicating that freshwater was correctly implemented in the model. Moreover, the correlation coefficient between the model and the tidal sea surface height (SSH) was 0.99, with an RMSD of 0.09 m. We discovered that wind direction and speed have a significant impact on the bay's water inflow rate. The model outputs can be used to provide scientists, fishermen and decision-makers with hydrodynamic information on ocean conditions in the bay.

Keywords

Clew Bay; ROMS; ADCP; Tide Gauge; Taylor Diagram; SSH

Subject

Environmental and Earth Sciences, Oceanography

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