The Effect of Wind Forcing on Modeling Coastal Circulation at a Marine Renewable Test Site

Ren, Lei; Nagle, Diarmuid; Hartnett, Michael

doi:10.3390/en10122114

Cited by 8 publications

(8 citation statements)

References 29 publications

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“…Indeed it corresponds to the weaker component of the flow. Comparing with the literature, those errors are of the same order as those obtained in Ren et al (2017), namely around 4.5−6 cm s −1 , where a different numerical model is used for Galway Bay.…”

Section: Overall Statisticssupporting

confidence: 75%

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A study of the wave effects on the current circulation in Galway Bay, using the numerical model COAWST

Calvino¹,

Dabrowski²,

Dias³

2021

Preprint

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A model coupling waves and currents is set up for Galway Bay, Ireland, using COAWST. The impact of the coupling on the accuracy of the model is shown to be marginal on the overall statistics. The model is in good agreement with the available in-situ observations that are used for the validation. However a closer look at the data during storms shows a deterioration of the agreement, which is barely improved by the coupling. A special analysis of the different processes ruling the ocean circulation and wave propagation is conducted during Storm Hector (2018/06/14). It shows a strong wave-induced surge by 7 cm in the back of Galway Bay, and a strong response in terms of currents along the coast of Clare of about 30 cm s −1 . Most of the surge is attributed to the impact of the conservative wave-induced forcing terms, but the main process involved is not identified. The response in currents is partly attributed to the conservative wave-induced forcing terms, but mostly to the wave-enhanced surface roughness.

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Section: Overall Statisticssupporting

confidence: 75%

“…Focusing on the ocean currents inside the bay, Ren et al (2017) compare results from a numerical model to ADCP and radar measurements using different wind forcing conditions. The ADCP data shows that surface currents are stronger and more variable than the depth-integrated currents, sometimes twice as strong.…”

Section: Galway Baymentioning

confidence: 99%

A study of the wave effects on the current circulation in Galway Bay, using the numerical model COAWST

Calvino¹,

Dabrowski²,

Dias³

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Radar stations are located at Mutton Island (C1 in Figure 1) and Spiddal Pier (C2 in Figure 1); the operating frequency is 25 MHz at both stations. Radial current vector fields from each station are recorded every hour [53]. Data from both radars are routinely transmitted to a combination center that is located in the campus of National University of Ireland, Galway, Ireland.…”

Section: Observational Datamentioning

confidence: 99%

Investigations into Synoptic Spatiotemporal Characteristics of Coastal Upper Ocean Circulation Using High Frequency Radar Data and Model Output

Ren

Chu

et al. 2020

Remote Sensing

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Numerical models and remote sensing observation systems such as radars are useful for providing information on surface flows for coastal areas. Evaluation of their performance and extracting synoptic characteristics are challenging and important tasks. This research aims to investigate synoptic characteristics of surface flow fields through undertaking a detailed analysis of model results and high frequency radar (HFR) data using self-organizing map (SOM) and empirical orthogonal function (EOF) analysis. A dataset of surface flow fields over thirteen days from these two sources was used. A SOM topology map of size 4 × 3 was developed to explore spatial patterns of surface flows. Additionally, comparisons of surface flow patterns between SOM and EOF analysis were carried out. Results illustrate that both SOM and EOF analysis methods are valuable tools for extracting characteristic surface current patterns. Comparisons indicated that the SOM technique displays synoptic characteristics of surface flow fields in a more detailed way than EOF analysis. Extracted synoptic surface current patterns are useful in a variety of applications, such as oil spill treatment and search and rescue. This research provides an approach to using powerful tools to diagnose ocean processes from different aspects. Moreover, it is of great significance to assess SOM as a potential forecasting tool for coastal surface currents.

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“…The water depth of the inner bay covered by the radar system ranged from 10-40 m. Meteorological conditions in Galway Bay are mainly influenced by Atlantic weather systems [15]. Effects of wind forcing on surface flow patterns has been studies in details by Ren et al [16]. Galway Bay is located on the west coast of Ireland with an entrance opening onto the northeast Atlantic Ocean.…”

Section: Study Domainmentioning

confidence: 99%

Estimation of Coastal Currents Using a Soft Computing Method: A Case Study in Galway Bay, Ireland

Ren

Jin

et al. 2019

JMSE

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In order to obtain forward states of coastal currents, numerical models are a commonly used approach. However, the accurate definition of initial conditions, boundary conditions and other model parameters are challenging. In this paper, a novel application of a soft computing approach, random forests (RF), was adopted to estimate surface currents for three analysis points in Galway Bay, Ireland. Outputs from a numerical model and observations from a high frequency radar system were used as inputs to develop soft computing models. The input variable structure of soft computing models was examined in detail through sensitivity experiments. High correlation of surface currents between predictions from RF models and radar data indicated that the RF algorithm is a most promising means of generating satisfactory surface currents over a long prediction period. Furthermore, training dataset lengths were examined to investigate influences on prediction accuracy. The largest improvement for zonal and meridional surface velocity components over a 59-h forecasting period was 14% and 37% of root mean square error (RMSE) values separately. Results indicate that the combination of RF models with a numerical model can significantly improve forecasting accuracy for surface currents, especially for the meridional surface velocity component.

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The Effect of Wind Forcing on Modeling Coastal Circulation at a Marine Renewable Test Site

Cited by 8 publications

References 29 publications

A study of the wave effects on the current circulation in Galway Bay, using the numerical model COAWST

A study of the wave effects on the current circulation in Galway Bay, using the numerical model COAWST

Investigations into Synoptic Spatiotemporal Characteristics of Coastal Upper Ocean Circulation Using High Frequency Radar Data and Model Output

Estimation of Coastal Currents Using a Soft Computing Method: A Case Study in Galway Bay, Ireland

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