Quantifying the residual volume transport through a multiple-inlet system in response to wind forcing: The case of the western Dutch Wadden Sea

Duran‐Matute, Matias; Gerkema, Theo; Sassi, M.G.

doi:10.1002/2016jc011807

Cited by 46 publications

(28 citation statements)

References 31 publications

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“…This sensitivity to wind direction has a regional variability, as is suggested by the model result in Fig. 11 and supported on shorter timescales by the modeling study by Duran-Matute et al (2016). Even on a small scale like the Dutch Wadden Sea, there is a spatial variability in the response of the annual mean sea level to changes in the wind climate.…”

Section: Discussionmentioning

confidence: 51%

“…Accordingly, the setup at watersheds is generally higher at the western side than at the eastern side. More evidence of the role of the wind in the spatial variability comes from the study by Duran-Matute et al (2016), where on tidal timescales a qualitatively similar spatial response was seen for (south)westerly winds.…”

Section: Regional Variabilitymentioning

confidence: 95%

“…We focus on the inter-tidal area of the Dutch Wadden Sea, which offers an interesting case because of the complex morphology and shallowness, and hence, a complex response to wind in the circulation and sea level (Duran-Matute et al, 2014. We include annual mean atmospheric pressure along with the annual characteristics of the wind climate.…”

Section: Introductionmentioning

confidence: 99%

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Interannual variability of mean sea level and its sensitivity to wind climate in an inter-tidal basin

Gerkema

Duran‐Matute

2017

Earth Syst. Dynam.

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Abstract.The relationship between the annual wind records from a weather station and annual mean sea level in an inter-tidal basin, the Dutch Wadden Sea, is examined. Recent, homogeneous wind records are used, covering the past 2 decades. It is demonstrated that even such a relatively short record is sufficient for finding a convincing relationship. The interannual variability of mean sea level is largely explained by the west-east component of the net wind energy, with some further improvement if one also includes the south-north component and the annual mean atmospheric pressure. Using measured data from a weather station is found to give a slight improvement over reanalysis data, but for both the correlation between annual mean sea level and wind energy in the westeast direction is high. For different tide gauge stations in the Dutch Wadden Sea and along the coast, we find the same qualitative characteristics, but even within this small region, different locations show a different sensitivity of annual mean sea level to wind direction. Correcting observed values of annual mean level for meteorological factors reduces the margin of error (expressed as 95 % confidence interval) by more than a factor of 4 in the trends of the 20-year sea level record. Supplementary data from a numerical hydrodynamical model are used to illustrate the regional variability in annual mean sea level and its interannual variability at a high spatial resolution. This study implies that climatic changes in the strength of winds from a specific direction may affect local annual mean sea level quite significantly.

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Section: Discussionmentioning

confidence: 51%

Section: Regional Variabilitymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Interannual variability of mean sea level and its sensitivity to wind climate in an inter-tidal basin

Gerkema

Duran‐Matute

2017

Earth Syst. Dynam.

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“…Journal of Geophysical Research: Oceans, 123, 8460-8488. https://doi.org/10. 1029 in offshore or open ocean waters (e.g., Flores et al, 2017;Horner-Devine et al, 2015), estuaries are semienclosed (Cameron & Pritchard, 1963;Hansen & Rattray, 1965, 1966 and lagoons can be more limited in exchange with the coastal ocean (Kjerfve, 1986;Kjerfve & Magill, 1989) and may even have multiple openings (Duran-Matute et al, 2016;Herrling & Winter, 2015;Jia & Li, 2012;Li, 2013). The constrictions of such system at entrance can act as low-pass filters that diminish tidal influence into the basin (Fernandes et al, 2004) or change the fortnightly tidal phases (Hill, 1994).…”

Section: 1029/2018jc013985mentioning

confidence: 99%

Flow Regimes and Adjustment to Wind‐Driven Motions in Lake Pontchartrain Estuary: A Modeling Experiment Using FVCOM

Huang

Chen

et al. 2018

JGR Oceans

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Lake Pontchartrain is a brackish estuary and restricted lagoon in the microtidal northern Gulf of Mexico. Using a validated Finite Volume Community Ocean Model (FVCOM), we study the flow regimes and wind‐driven adjustment of circulation in this system. It is found that tidal currents are only significant in the eastern end near the open boundary. Local wind inside the estuary is important in driving the circulation including coastal currents. Numerical experiments confirm that the subtidal wind‐driven flow is in a quasi‐steady balance between wind stress and surface slope. Our results show that the adjustment of surface level inside the system to a sudden change in wind is a transient seiche, which dissipates within two to three cycles, each lasting ~3 hr. After the oscillations, the system reaches a new equilibrium. We show in theory that this is a damped oscillation and as wind changes, an adjustment to a new equilibrium goes much faster than a complete tidal period. This leads to the quasi steady state balance of subtidal wind‐driven flows with essentially no phase lag with wind even though wind changes with time continuously. Wind‐induced circulation behaves differently from the Csanady model with Earth rotation but similar to the prismatic lake model of Engelund without Coriolis: The coastal and shallow regions tend to have flows in the direction of wind, while the interior and deeper waters have return flows against the wind especially in bottom layer. The surface flow may not be in the direction of wind, while the bottom usually has broad and uniform counter wind flows.

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“…Recent studies are directing to the importance of wind-driven circulation (e.g., Duran-Matute et al 2016). In the Wadden Sea, winddriven flow is capable of pushing large amounts of water and steer the sediment pathways so they overshoot the channel network and cross the watersheds between the sub-basins (Sassi et al 2015).…”

Section: Residual Transport and Balancing Mechanismsmentioning

confidence: 99%

Net sediment transport in tidal basins: quantifying the tidal barotropic mechanisms in a unified framework

2017

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Net sediment transport in tidal basins is a subtle imbalance between large fluxes produced by the flood/ebb alternation. The imbalance arises from several mechanisms of suspended transport. Lag effects and tidal asymmetries are regarded as dominant, but defined in different frames of reference (Lagrangian and Eulerian, respectively). A quantitative ranking of their effectiveness is therefore missing. Furthermore, although wind waves are recognized as crucial for tidal flats' morphodynamics, a systematic analysis of the interaction with tidal mechanisms has not been carried out so far. We review the tide-induced barotropic mechanisms and discuss the shortcomings of their current classification for numerical process-based models. Hence, we conceive a unified Eulerian framework accounting for wave-induced resuspension. A new methodology is proposed to decompose the sediment fluxes accordingly, which is applicable without needing (semi-) analytical approximations. The approach is tested with a one-dimensional model of the Vlie basin, Wadden Sea (The Netherlands). Results show that lag-driven transport is dominant for the finer fractions (silt and mud). In absence of waves, net sediment fluxes are landward and spatial (advective) lag effects are dominant. In presence of waves, sediment can be exported from the tidal flats and temporal (local) lag effects are dominant. Conversely, sand transport is dominated by the asymmetry of peak ebb/flood velocities. We show that the direction of lag-driven transport can be estimated by the gradient of hydrodynamic energy. In agreement with previous studies, our results support the conceptualization of tidal flats' equilibrium as a simplified balance between tidal mechanisms and wave resuspension.

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Quantifying the residual volume transport through a multiple-inlet system in response to wind forcing: The case of the western Dutch Wadden Sea

Cited by 46 publications

References 31 publications

Interannual variability of mean sea level and its sensitivity to wind climate in an inter-tidal basin

Interannual variability of mean sea level and its sensitivity to wind climate in an inter-tidal basin

Flow Regimes and Adjustment to Wind‐Driven Motions in Lake Pontchartrain Estuary: A Modeling Experiment Using FVCOM

Net sediment transport in tidal basins: quantifying the tidal barotropic mechanisms in a unified framework

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