Sea level rise impact in residual circulation in Tagus estuary and Ria de Aveiro lagoon

Valentim, Juliana; Vaz, Leandro; Vaz, Nuno; Silva, Helena; Duarte, Bernardo; Caçador, Isabel; Dias, João Miguel

doi:10.2112/si65-335.1

Cited by 27 publications

(16 citation statements)

References 38 publications

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“…Many other studies have predicted changes in tides with MSL change for smaller estuaries around the world (e.g., Cai et al, ; Valentim et al, ) and idealized estuaries (e.g., Du et al, ). The results of these are hard to generalize.…”

Section: Future Changes In Tides and Implicationsmentioning

confidence: 99%

“…The majority of these future tidal studies have used depth‐averaged tidal models to assess changes in the main semidiurnal and/or diurnal tidal constituents and in some cases changes in tidal high and low waters, tidal range, and other parameters (e.g., tidal currents, bed shear stress, and tidal dissipation). Only in a few exceptions have baroclinic models been used (e.g., Ross et al, ; Valentim et al, ), but this has been done only on an estuary scale. The majority of modeling studies have used finite difference grids.…”

Section: Future Changes In Tides and Implicationsmentioning

confidence: 99%

See 1 more Smart Citation

The Tides They Are A‐Changin': A Comprehensive Review of Past and Future Nonastronomical Changes in Tides, Their Driving Mechanisms, and Future Implications

Haigh

Pickering

Green

et al. 2020

Reviews of Geophysics

184

173

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Scientists and engineers have observed for some time that tidal amplitudes at many locations are shifting considerably due to nonastronomical factors. Here we review comprehensively these important changes in tidal properties, many of which remain poorly understood. Over long geological time scales, tectonic processes drive variations in basin size, depth, and shape and hence the resonant properties of ocean basins. On shorter geological time scales, changes in oceanic tidal properties are dominated by variations in water depth. A growing number of studies have identified widespread, sometimes regionally coherent, positive, and negative trends in tidal constituents and levels during the 19th, 20th, and early 21st centuries. Determining the causes is challenging because a tide measured at a coastal gauge integrates the effects of local, regional, and oceanic changes. Here, we highlight six main factors that can cause changes in measured tidal statistics on local scales and a further eight possible regional/global driving mechanisms. Since only a few studies have combined observations and models, or modeled at a temporal/spatial resolution capable of resolving both ultralocal and large‐scale global changes, the individual contributions from local and regional mechanisms remain uncertain. Nonetheless, modeling studies project that sea level rise and climate change will continue to alter tides over the next several centuries, with regionally coherent modes of change caused by alterations to coastal morphology and ice sheet extent. Hence, a better understanding of the causes and consequences of tidal variations is needed to help assess the implications for coastal defense, risk assessment, and ecological change.

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Section: Future Changes In Tides and Implicationsmentioning

confidence: 99%

Section: Future Changes In Tides and Implicationsmentioning

confidence: 99%

The Tides They Are A‐Changin': A Comprehensive Review of Past and Future Nonastronomical Changes in Tides, Their Driving Mechanisms, and Future Implications

Haigh

Pickering

Green

et al. 2020

Reviews of Geophysics

184

173

View full text Add to dashboard Cite

show abstract

“…Specifically, tidal hydrodynamics influences inundation, circulation, and sediment transport processes. Previous studies have found that SLR may cause nonlinear increases in tidal ranges and tidal prisms, and may alter inundation, current velocities, and circulation patterns in the nearshore environment [French, 2008;Leorri et al, 2011;Pickering et al, 2012;Hall et al, 2013;Pelling et al, 2013;Valentim et al, 2013;Arns et al, 2015]. In addition, long-term shoreline erosion rates are expected to increase under future SLR [Gutierrez et al, 2011], which may have consequences for barrier islands 10.1002/2015EF000332 and coastal embayments.…”

Section: Introductionmentioning

confidence: 99%

Tidal hydrodynamics under future sea level rise and coastal morphology in the Northern Gulf of Mexico

et al. 2016

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This study examines the integrated influence of sea level rise (SLR) and future morphology on tidal hydrodynamics along the Northern Gulf of Mexico (NGOM) coast including seven embayments and three ecologically and economically significant estuaries. A large-domain hydrodynamic model was used to simulate astronomic tides for present and future conditions (circa 2050 and 2100). Future conditions were simulated by imposing four SLR scenarios to alter hydrodynamic boundary conditions and updating shoreline position and dune heights using a probabilistic model that is coupled to SLR. Under the highest SLR scenario, tidal amplitudes within the bays increased as much as 67% (10.0 cm) because of increases in the inlet cross-sectional area. Changes in harmonic constituent phases indicated that tidal propagation was faster in the future scenarios within most of the bays. Maximum tidal velocities increased in all of the bays, especially in Grand Bay where velocities doubled under the highest SLR scenario. In addition, the ratio of the maximum flood to maximum ebb velocity decreased in the future scenarios (i.e., currents became more ebb dominant) by as much as 26% and 39% in Weeks Bay and Apalachicola, respectively. In Grand Bay, the flood-ebb ratio increased (i.e., currents became more flood dominant) by 25% under the lower SLR scenarios, but decreased by 16% under the higher SLR as a result of the offshore barrier islands being overtopped, which altered the tidal prism. Results from this study can inform future storm surge and ecological assessments of SLR, and improve monitoring and management decisions within the NGOM.

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“…The residual currents of barotropic motion play an important role in the transport of sediment, nutrients and organic matter in lagoons and estuaries, namely, in their exportation toward coastal seas (Valentim et al, 2013). For this reason, proper modeling of tidal dynamics is a prerequisite of any modeling efforts in the shelf part of the Laptev Sea.…”

Section: Introductionmentioning

confidence: 99%

Semidiurnal tides in the Laptev Sea Shelf zone in the summer season

Fofonova

Androsov

Danilov

et al. 2014

Continental Shelf Research

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Tidal processes play an important role in the dynamics of shelf circulation in the Laptev Sea.The Unstructured Grid Finite Volume Coastal Ocean Model (FVCOM) is used to simulate the tidal dynamics in the Lena Delta region of the Laptev Sea in ice-free barotropic case. The grid element size is ranging from 400 m to 5 km. The major semidiurnal tidal waves 2 and 2 are investigated with the 2 being the most important in generating large sea level amplitudes and currents over the shallow areas. A correction to the tidal elevation at the open boundary is proposed which minimizes the discrepancy between the model prediction and observations. The observations include both recent mooring data and the standard set of tide gauge measurements used in previous studies. The comparison of results to known tidal solutions is carried out. The paper also discusses the residual circulation and energy fluxes and assesses the impact of additional bathymetric information.

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Sea level rise impact in residual circulation in Tagus estuary and Ria de Aveiro lagoon

Cited by 27 publications

References 38 publications

The Tides They Are A‐Changin': A Comprehensive Review of Past and Future Nonastronomical Changes in Tides, Their Driving Mechanisms, and Future Implications

The Tides They Are A‐Changin': A Comprehensive Review of Past and Future Nonastronomical Changes in Tides, Their Driving Mechanisms, and Future Implications

Tidal hydrodynamics under future sea level rise and coastal morphology in the Northern Gulf of Mexico

Semidiurnal tides in the Laptev Sea Shelf zone in the summer season

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