Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina
During the last decade, global tidal models have spectacularly improved. However, they still have difficulties in resolving tides over continental shelves and near coastlines. This study of tidal propagation from the continental shelf to the North Patagonia Gulfs of Argentina applies a set of three...
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paper:paper_07490208_v27_n1_p87_Moreira2023-06-08T15:45:20Z Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina Simionato, Claudia Gloria Dragani, Walter César Argentina Continental Shelf North Patagonia Gulfs Patagonian Shelf Tidal energetic coast coastal zone continental shelf Kelvin wave ocean tide primary production sea surface temperature stratification tidal current tidal cycle Argentina Atlantic Ocean Patagonian Shelf During the last decade, global tidal models have spectacularly improved. However, they still have difficulties in resolving tides over continental shelves and near coastlines. This study of tidal propagation from the continental shelf to the North Patagonia Gulfs of Argentina applies a set of three nested high resolution models based on the Hamburg shelf ocean model (HamSOM), where particular attention was paid to the bathymetry and the coast line. The study is complemented by the use of all the tidal gauge and tidal current observations available. Simulations display good agreement with observations, permitting the construction of higher resolution and more reliable cotidal and corange charts. The tidal regime in the area is essentially semidiurnal and dominated by M2. This constituent propagates northward as a Kelvin wave and reaches the gulfs from the south. In their interior an important amplification is observed. Tidal currents are large at the mouths of the gulfs, and weaken toward their interior. The nonlinear transfer of energy from the semidiurnal to higher order harmonics was analyzed. This can be very important in the interior of the gulfs, particularly in Nuevo Gulf and in the northwestern San Matías Gulf, close to San Antonio. Energy flux and energy dissipation by bottom friction has been computed and indicate that this region dissipates 17% of the total energy dissipated on the Patagonian Shelf which, in turn, is one of the most dissipative areas of the world ocean. The Simpson-Hunter parameter computed from the simulations shows that in the mouth of the gulfs, particularly in San Matías and east of the Península de Valdés, the tides are energetic enough to overcome stratification and produce tidal fronts. The locations where tidal fronts are located are highly consistent with results from sea surface temperature and primary productivity data analyzed by other authors. © Coastal Education & Research Foundation 2011. Fil:Simionato, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dragani, W. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07490208_v27_n1_p87_Moreira http://hdl.handle.net/20.500.12110/paper_07490208_v27_n1_p87_Moreira |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Continental Shelf North Patagonia Gulfs Patagonian Shelf Tidal energetic coast coastal zone continental shelf Kelvin wave ocean tide primary production sea surface temperature stratification tidal current tidal cycle Argentina Atlantic Ocean Patagonian Shelf |
| spellingShingle |
Argentina Continental Shelf North Patagonia Gulfs Patagonian Shelf Tidal energetic coast coastal zone continental shelf Kelvin wave ocean tide primary production sea surface temperature stratification tidal current tidal cycle Argentina Atlantic Ocean Patagonian Shelf Simionato, Claudia Gloria Dragani, Walter César Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| topic_facet |
Argentina Continental Shelf North Patagonia Gulfs Patagonian Shelf Tidal energetic coast coastal zone continental shelf Kelvin wave ocean tide primary production sea surface temperature stratification tidal current tidal cycle Argentina Atlantic Ocean Patagonian Shelf |
| description |
During the last decade, global tidal models have spectacularly improved. However, they still have difficulties in resolving tides over continental shelves and near coastlines. This study of tidal propagation from the continental shelf to the North Patagonia Gulfs of Argentina applies a set of three nested high resolution models based on the Hamburg shelf ocean model (HamSOM), where particular attention was paid to the bathymetry and the coast line. The study is complemented by the use of all the tidal gauge and tidal current observations available. Simulations display good agreement with observations, permitting the construction of higher resolution and more reliable cotidal and corange charts. The tidal regime in the area is essentially semidiurnal and dominated by M2. This constituent propagates northward as a Kelvin wave and reaches the gulfs from the south. In their interior an important amplification is observed. Tidal currents are large at the mouths of the gulfs, and weaken toward their interior. The nonlinear transfer of energy from the semidiurnal to higher order harmonics was analyzed. This can be very important in the interior of the gulfs, particularly in Nuevo Gulf and in the northwestern San Matías Gulf, close to San Antonio. Energy flux and energy dissipation by bottom friction has been computed and indicate that this region dissipates 17% of the total energy dissipated on the Patagonian Shelf which, in turn, is one of the most dissipative areas of the world ocean. The Simpson-Hunter parameter computed from the simulations shows that in the mouth of the gulfs, particularly in San Matías and east of the Península de Valdés, the tides are energetic enough to overcome stratification and produce tidal fronts. The locations where tidal fronts are located are highly consistent with results from sea surface temperature and primary productivity data analyzed by other authors. © Coastal Education & Research Foundation 2011. |
| author |
Simionato, Claudia Gloria Dragani, Walter César |
| author_facet |
Simionato, Claudia Gloria Dragani, Walter César |
| author_sort |
Simionato, Claudia Gloria |
| title |
Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| title_short |
Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| title_full |
Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| title_fullStr |
Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| title_full_unstemmed |
Modeling ocean tides and their energetics in the North Patagonia Gulfs of Argentina |
| title_sort |
modeling ocean tides and their energetics in the north patagonia gulfs of argentina |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07490208_v27_n1_p87_Moreira http://hdl.handle.net/20.500.12110/paper_07490208_v27_n1_p87_Moreira |
| work_keys_str_mv |
AT simionatoclaudiagloria modelingoceantidesandtheirenergeticsinthenorthpatagoniagulfsofargentina AT draganiwaltercesar modelingoceantidesandtheirenergeticsinthenorthpatagoniagulfsofargentina |
| _version_ |
1768545012017004544 |