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William J. Pringle, Damrongsak Wirasaet, Andika Suhardjo, Jessica Meixner, Joannes J. Westerink, Andrew B. Kennedy, Shangyao Nong |
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Title |
Finite-Element barotropic model for the Indian and Western Pacific Oceans: Tidal model-data comparisons and sensitivities |
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Journal |
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Year |
2018 |
Publication |
Ocean modelling |
Abbreviated Journal |
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Volume |
129 |
Issue |
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Pages |
13-38 |
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Keywords |
Barotropic tides Bathymetry Bottom friction Finite-element Internal tide energy conversion Unstructured grid |
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Abstract |
In this study, a 9.6 million node large-scale unstructured grid finite-element forward barotropic model is developed and applied to understand the tidal dynamics and dissipation mechanisms of the Indian and western Pacific Oceans down to sub-kilometer scale at the coast. Tidal model-data comparisons are presented to assess the capabilities and limitations of our large-scale barotropic model. The average root-mean-square (RMS) discrepancies of tidal elevations at coastal tide gauges is 14 cm, which is ???3 cm smaller than those of a state-of-the-art global data assimilated barotropic tidal model. Sensitivities to lateral boundary conditions, bathymetry, and dissipative processes are explored to guide future endeavors related to large-scale barotropic modeling in the region and other regions throughout the world. Lateral boundary conditions are found to induce adverse resonant effects on the lunar semi-diurnal modes when poorly placed elevation specified boundary conditions are used. This problem is largely resolved by using an absorption-generation layer at the boundary. Parameterization of internal tide energy conversion is identified as the most important aspect to control deep water solutions, and help reduce the RMS discrepancies of the entire system. Two forms of this parameterization are presented and their spatial distributions of dissipation are compared. Bathymetry has a negligible effect on the tidal solutions in deep water, but local high resolution bathymetry results in significant reductions to the average RMS discrepancies on the continental shelf (26%) and at the coast (30%). Implementing a spatially varying bottom friction coefficient based on sediment types decreases the average RMS discrepancy at the coast by 9% predominantly due to its positive effects in the Yellow Sea. The model is shown to capture a large amount of the tidal physics and has the potential for application to a range of barotropic problems such as wind-driven surge and tidal processes. |
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1463-5003 |
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1463-5003 |
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yes |
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7448 |
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Sanne Muis, Martin Verlaan, Robert J. Nicholls, Sally Brown, Jochen Hinkel, Daniel Lincke, Athanasios T. Vafeidis, Paolo Scussolini, Hessel C. Winsemius, Philip J. Ward |
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Title |
A comparison of two global datasets of extreme sea levels and resulting flood exposure |
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Journal |
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Year |
2017 |
Publication |
Earth's Future |
Abbreviated Journal |
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Volume |
5 |
Issue |
4 |
Pages |
379-392 |
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Keywords |
coastal floods extreme sea levels flood risk hydrodynamic modeling natural hazards storm surge |
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688 |
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2328-4277 |
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2328-4277 |
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yes |
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7455 |
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2017 |
Publication |
Global and Planetary Change |
Abbreviated Journal |
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Volume |
148 |
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Pages |
9-21 |
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Keywords |
Climate variability Historical reconstruction Multiple linear regression Statistical modelling Storm surge |
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688 |
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0921-8181 |
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0921-8181 |
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yes |
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7477 |
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Jens Zinke, Juan P. D'Olivo, Christoph J. Gey, Malcolm T. McCulloch, J. Henrich Bruggemann, Janice M. Lough, Mireille M. M. Guillaume |
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Title |
Multi-trace-element sea surface temperature coral reconstruction for the southern Mozambique Channel reveals teleconnections with the tropical Atlantic |
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2019 |
Publication |
Biogeosciences |
Abbreviated Journal |
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Volume |
16 |
Issue |
3 |
Pages |
695-712 |
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688 |
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ISSN |
1726-4170 |
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1726-4170 |
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yes |
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Serial |
7497 |
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Author |
Téchiné P., G. Alory, L. Testut. |
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Title |
Gestion des données de réseaux d'observations océanographiques |
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Non peer-reviewed symposium |
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2018 |
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688 |
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yes |
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Serial |
7540 |
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Book Chapter |
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Year |
2019 |
Publication |
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Abbreviated Journal |
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688 |
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Bachelor's thesis |
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yes |
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7557 |
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Title |
Towards Comprehensive Observing and Modeling Systems for Monitoring and Predicting Regional to Coastal Sea Level |
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2019 |
Publication |
Frontiers in Marine Science |
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Keywords |
coastal adaptation Coastal impacts coastal ocean modeling Coastal sea level integrated observing system observational gaps Sea level trends |
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Abstract |
A major challenge for managing impacts and implementing effective mitigation and adaptation strategies for coastal zones affected by future sea level (SL) rise is our very limited capacity to predict SL change on coastal scales, over various timescales. Predicting coastal SL requires the ability to monitor and simulate a multitude of physical processes affecting SL, from local effects of wind waves and river runoff to remote influences of the large-scale ocean circulation on the coast. Here we assess our current understanding of the causes of coastal SL variability on seasonal to multi-decadal timescales, including geodetic, oceanographic and atmospheric aspects of the problem, and review available observing systems informing on coastal SL. We also review the ability of current models and data assimilation systems to estimate coastal SL variations and of atmosphere-ocean global coupled models and related regional downscaling efforts to project future SL changes. We discuss (1) key observational gaps and uncertainties, and priorities for the development of an optimal and integrated coastal SL observing system, (2) strategies for advancing model capabilities in forecasting short-term processes and projecting long-term changes affecting coastal SL, and (3) possible future developments of sea level services enabling better connection of scientists and user communities and facilitating assessment and decision making for adaptation to future coastal SL change. |
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688 |
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ISSN |
2296-7745 |
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yes |
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7955 |
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Title |
National Report of France to the XVIth GLOSS Group of Experts 11-13 April 2019 |
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2019 |
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Abbreviated Journal |
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688 |
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Bachelor's thesis |
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yes |
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7621 |
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National Report of France to the XVth GLOSS Group of Experts Meeting, (15th meeting), 9-10 July 2017, New-York |
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2017 |
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688 |
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yes |
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7622 |
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Book Chapter |
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Year |
2019 |
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Abbreviated Journal |
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688 |
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Bachelor's thesis |
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yes |
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Call Number |
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7624 |
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