Interaction of waves, currents and tides, and wave-energy impact on the beach area of Sylt Island

Pleskachevsky, Andrey; Eppel, D.; Kapitza, Hartmut

doi:10.1007/s10236-008-0174-1

Cited by 27 publications

(14 citation statements)

References 4 publications

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“…Until now, the impact of wave processes on the circulation and mixing in the Baltic Sea has seldom been studied, compared for example to the North Sea (Pleskachevsky et al 2009;Pleskachevsky et al 2011;Grashorn et al 2015). Axell (2002) studied the impact of Langmuir circulation on vertical distribution of salinity and found that the thickness of the upper mixed layer deepens by 8 m in the southern Baltic Sea.…”

Section: Wave Effects On Circulationmentioning

confidence: 98%

Surface wave effects on water temperature in the Baltic Sea: simulations with the coupled NEMO-WAM model

et al. 2016

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Coupled circulation (NEMO) and wave model (WAM) system was used to study the effects of surface ocean waves on water temperature distribution and heat exchange at regional scale (the Baltic Sea). Four scenarios-including Stokes-Coriolis force, sea-state dependent energy flux (additional turbulent kinetic energy due to breaking waves), seastate dependent momentum flux and the combination these forcings-were simulated to test the impact of different terms on simulated temperature distribution. The scenario simulations were compared to a control simulation, which included a constant wave-breaking coefficient, but otherwise was without any wave effects. The results indicate a pronounced effect of waves on surface temperature, on the distribution of vertical temperature and on upwelling's. Overall, when all three wave effects were accounted for, did the estimates of temperature improve compared to control simulation. During the summer, the wave-induced water temperature changes were up to 1°C. In northern parts of the Baltic Sea, a warming of the surface layer occurs in the wave included simulations in summer months. This in turn reduces the cold bias between simulated and measured data, e.g. the control simulation was too cold compared to measurements. The warming is related to seastate dependent energy flux. This implies that a spatiotemporally varying wave-breaking coefficient is necessary, because it depends on actual sea state. Wave-induced cooling is mostly observed in near-coastal areas and is the result of intensified upwelling in the scenario, when Stokes-Coriolis forcing is accounted for. Accounting for sea-state dependent momentum flux results in modified heat exchange at the water-air boundary which consequently leads to warming of surface water compared to control simulation.

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Section: Wave Effects On Circulationmentioning

confidence: 98%

Surface wave effects on water temperature in the Baltic Sea: simulations with the coupled NEMO-WAM model

et al. 2016

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“…Also, the mean flow will be affected by the addition of momentum and mass fluxes. With variation in water level, the depth felt by the waves also changes in the coastal region, thereby modifying the shallow water effects on the waves (Pleskachevsky et al, 2009). Liu et al (2016) Published by Copernicus Publications on behalf of the European Geosciences Union.…”

Section: Introductionmentioning

confidence: 99%

Wave–current interaction during Hudhud cyclone in the Bay of Bengal

Volvaiker¹,

Vethamony²,

Antony³

et al. 2017

Nat. Hazards Earth Syst. Sci.

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Abstract. The present work describes the interaction between waves and currents utilizing a coupled ADCIRC+SWAN model for the very severe cyclonic storm Hudhud, which made landfall at Visakhapatnam on the east coast of India in October 2014. Model-computed wave and surge heights were validated with measurements near the landfall point. The Holland model reproduced the maximum wind speed of ≈ 54 m s −1 with the minimum pressure of 950 hPa. The modelled maximum surge of 1.2 m matches with the maximum surge of 1.4 m measured off Visakhapatnam. The two-way coupling with SWAN showed that waves contributed ≈ 0.25 m to the total water level during the Hudhud event. At the landfall point near Visakhapatnam, the East India Coastal Current speed increased from 0.5 to 1.8 m s −1 for a short duration (≈ 6 h) with net flow towards the south, and thereafter reversed towards the north. An increase of ≈ 0.2 m in H s was observed with the inclusion of model currents. It was also observed that when waves travelled perpendicular to the coast after crossing the shelf area, with current towards the southwest, wave heights were reduced due to wave-current interaction; however, an increase in wave height was observed on the left side of the track, when waves and currents opposed each other.

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“…Also, the water level has an influence on waves, by changing the depth felt by waves (e.g. Pleskachevsky and Kapitza, 2009). Conversely, the currents can be strongly forced and modified by waves.…”

Section: Introductionmentioning

confidence: 96%

Current–wave interaction in the Mississippi–Atchafalaya river plume on the Texas–Louisiana shelf

et al. 2014

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a b s t r a c tWave-current interaction over the Texas-Louisiana shelf, and its effects on the dispersal and mixing of the Mississippi-Atchafalaya river plume, have been investigated using the Coupled Ocean-Atmosphere-Wave-Sediment Transport (COAWST) Modeling System. The modeling system is driven by realistic wave and current conditions at the open boundaries and high frequency1-D wind measured from a nearby meteorological station. Skill analysis demonstrates that the model reproduces the wave and salinity fields reasonably well. Waves over the Texas-Louisiana shelf are dominated by locally forced wind seas, and generally propagate in the same direction as the winds. Investigation into the spatial differences in the effect of waves reveals two distinct dynamical regions: the Chenier shelf, the shelf region extending roughly offshore from Sabine Lake to Vermilion Bay, and the Louisiana Bight, the region between the Mississippi Delta and Terrebonne Bay. A variety of model runs are performed, where specific wave processes are either included or excluded, in order to isolate the processes acting in different regions. The Chenier shelf is mainly affected by wave enhanced bottom stress, whereas the Louisiana Bight is mostly affected by the surface wave induced mixing and 3-D wave forces. The wave enhanced bottom stress suppresses cross-shore exchange, and acts to trap more freshwater in the nearshore regions shallower than 50 m over the Chenier shelf. Wave enhanced bottom stress plays only a minor role in the Louisiana Bight, where the surface-trapped Mississippi plume rarely feels the bottom. The surface intensified wave mixing and 3-D wave forces reduce the surface salinity and weaken the stratification in the region associated with the thin recirculating Mississippi plume in the Louisiana Bight. Model results indicate that the surface wave mixing, the 3-D wave forces, and the wave bottom stress exhibit little interaction over the Texas-Louisiana shelf. Finally, we have demonstrated that the one-way coupling is capable of resolving the majority of wave effects over the entire shelf if the seasonal scale is of interest.

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Interaction of waves, currents and tides, and wave-energy impact on the beach area of Sylt Island

Cited by 27 publications

References 4 publications

Surface wave effects on water temperature in the Baltic Sea: simulations with the coupled NEMO-WAM model

Surface wave effects on water temperature in the Baltic Sea: simulations with the coupled NEMO-WAM model

Wave–current interaction during Hudhud cyclone in the Bay of Bengal

Current–wave interaction in the Mississippi–Atchafalaya river plume on the Texas–Louisiana shelf

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