Wave-Tide Interactions in Ocean Renewable Energy

Hashemi, M. Reza; Lewis, Matt

doi:10.1007/978-3-319-53536-4_6

Cited by 4 publications

(3 citation statements)

References 66 publications

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“…Breivik et al (2015) presented the first discussion of including surface wave effects in NEMO based on global-scale ocean simulations at 1 • resolution. They included parameterisations for the modification of surface stress from wave growth and dissipation (Janssen et al, 2004), the Stokes-Coriolis force (Hasselmann, 1970), and the turbulent kinetic energy flux from breaking waves (Craig and Banner, 1994). Breivik et al (2015) demonstrated reduced sea surface and subsurface temperature biases relative to observations, and improved predictions of the total ocean heat content at global scales.…”

Section: Introductionmentioning

confidence: 99%

Can wave coupling improve operational regional ocean forecasts for the north-west European Shelf?

et al. 2019

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Operational ocean forecasts are typically produced by modelling systems run using a forced mode approach. The evolution of the ocean state is not directly influenced by surface waves, and the ocean dynamics are driven by an external source of meteorological data which are independent of the ocean state. Model coupling provides one approach to increase the extent to which ocean forecast systems can represent the interactions and feedbacks between ocean, waves, and the atmosphere seen in nature. This paper demonstrates the impact of improving how the effect of waves on the momentum exchange across the ocean-atmosphere interface is represented through ocean-wave coupling on the performance of an operational regional ocean prediction system. This study focuses on the eddy-resolving (1.5 km resolution) Atlantic Margin Model (AMM15) ocean model configuration for the north-west European Shelf (NWS) region.A series of 2-year duration forecast trials of the Copernicus Marine Environment Monitoring Service (CMEMS) north-west European Shelf regional ocean prediction system are analysed. The impact of including ocean-wave feedbacks via dynamic coupling on the simulated ocean is discussed. The main interactions included are the modification of surface stress by wave growth and dissipation, Stokes-Coriolis forcing, and wave-height-dependent ocean surface roughness. Given the relevance to operational forecasting, trials with and without ocean data assimilation are considered.Summary forecast metrics demonstrate that the oceanwave coupled system is a viable evolution for future oper-ational implementation. When results are considered in more depth, wave coupling was found to result in an annual cycle of relatively warmer winter and cooler summer sea surface temperatures for seasonally stratified regions of the NWS. This is driven by enhanced mixing due to waves, and a deepening of the ocean mixed layer during summer. The impact of wave coupling is shown to be reduced within the mixed layer with assimilation of ocean observations. Evaluation of salinity and ocean currents against profile measurements in the German Bight demonstrates improved simulation with wave coupling relative to control simulations. Further, evidence is provided of improvement to simulation of extremes of sea surface height anomalies relative to coastal tide gauges.

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Section: Introductionmentioning

confidence: 99%

Can wave coupling improve operational regional ocean forecasts for the north-west European Shelf?

et al. 2019

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“…25 COAWST has also been implemented for a domain covering the North West European shelf seas, similar to that used in this study, by Hashemi et al (2014) using a horizontal grid spacing of order 4 km (1/24°). Their analysis focussed on the impact of coupling on the wave simulations for wave energy resource applications (Hashemi and Lewis, 2017).…”

Section: Introductionmentioning

confidence: 99%

Can wave coupling improve operational regional ocean forecasts for the North-West European Shelf?

Lewis¹,

Sanchez²,

Siddorn³

et al. 2018

Preprint

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Operational ocean forecasts are typically produced by modelling systems run using a forced mode approach. The evolution of the ocean state is not directly influenced by surface waves, and the ocean dynamics are driven by an external source of meteorological data which is independent of the ocean state. Model coupling provides one approach to increase the extent to which ocean forecast systems can represent the interactions and feedbacks between ocean, waves and the atmosphere seen in 15 nature. This paper demonstrates the impact of improving how the effect of waves on the momentum exchange across the ocean-atmosphere interface is represented through ocean-wave coupling on the performance of an operational regional ocean prediction system. This study focuses on the eddy-resolving (1.5 km resolution) Atlantic Margin Model (AMM15) ocean model configuration for the North-West European Shelf (NWS) region.A series of two-year duration forecast trials of the Copernicus Marine Environment Monitoring Service (CMEMS) North-20 West Shelf regional ocean prediction system are analysed. The impact of including ocean-wave feedbacks via dynamic coupling on the simulated ocean is discussed. The main interactions included are the modification of surface stress by wave growth and dissipation, Stokes-Coriolis forcing and wave height dependent ocean surface roughness. Given the relevance to operational forecasting, trials with and without ocean data assimilation are considered.Summary forecast metrics demonstrate that the ocean-wave coupled system is a viable evolution for future operational 25 implementation. When results are considered in more depth, wave coupling was found to result in an annual cycle of relatively warmer winter and cooler summer sea surface temperatures for seasonally stratified regions of the NWS. This is driven by enhanced mixing due to waves, and a deepening of the ocean mixed layer during summer. The impact of wave coupling is shown to be reduced within the mixed layer with assimilation of ocean observations. Evaluation of salinity and ocean currents against profile measurements in the German Bight demonstrates improved simulation with wave coupling relative to control 30 simulations. Further, evidence is provided of improvement to simulation of extremes of sea surface height anomalies relative to coastal tide gauges.Ocean Sci. Discuss., https://doi.

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“…Quirapas et al (2015) outline the many challenges involved in developing marine renewable energy in Southeast Asia, the first and foremost of which is that of resource assessment. The accurate assessment of a tidal stream energy resource is a complex and computationally expensive process, which requires careful numerical modelling to incorporate a broad range of external forces, from tidal constituents to surface waves Hashemi and Lewis 2017); capture interactions between the turbines and the flow at numerous length and timescales (Adcock et al 2015;Vennell et al 2015); and account for three-dimensional flow characteristics including turbulence (Neill et al 2014). The upper bound approach of Adcock et al (2013) provides a simple and relatively inexpensive means by which to establish an upper bound on the power available to rows of turbines placed at a given location and also enables comparison, in terms of power per swept area, between different development options.…”

Section: Associated Changes To the Natural Flow Regimementioning

confidence: 99%

Assessment of the Malaysian tidal stream energy resource using an upper bound approach

Bonar

Schnabl

Lee

et al. 2018

J. Ocean Eng. Mar. Energy

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In this paper, an upper bound approach is used to determine the maximum power available to tidal stream turbines placed at five sites along the west coast of Peninsular Malaysia. A depth-averaged hydrodynamic model of the Malacca Strait is built and validated against field measurements. Actuator disc theory is then used to introduce rows of tidal stream turbines as line sinks of momentum and to determine the maximum time-averaged power available to rows of both moderately sized and very large turbines, placed strategically at the locations of highest naturally occurring kinetic energy flux. Results suggest that although the Malaysian tidal stream energy resource is not large enough to make a significant contribution to the country's energy mix, there may yet be opportunities to use low-speed tidal turbines in small-scale and off-grid electricity generation schemes. Methods are described in detail and links to source codes and results are provided to encourage the application of this simple, yet effective resource assessment methodology to other promising tidal energy sites.

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Wave-Tide Interactions in Ocean Renewable Energy

Cited by 4 publications

References 66 publications

Can wave coupling improve operational regional ocean forecasts for the north-west European Shelf?

Can wave coupling improve operational regional ocean forecasts for the north-west European Shelf?

Can wave coupling improve operational regional ocean forecasts for the North-West European Shelf?

Assessment of the Malaysian tidal stream energy resource using an upper bound approach

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