Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina
Four current time series, collected at costal locations of the San Matías and San Jose' gulfs, Argentina, are analyzed for tidal and residual currents. Tides dominate San Matías Gulf dynamics, accounting for more than 72% of the variance, whereas winds dominate at San José Gulf, explaining appr...
Guardado en:
| Autores principales: | , , |
|---|---|
| Publicado: |
2009
|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07490208_v25_n4_p957_Moreira http://hdl.handle.net/20.500.12110/paper_07490208_v25_n4_p957_Moreira |
| Aporte de: |
| id |
paper:paper_07490208_v25_n4_p957_Moreira |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_07490208_v25_n4_p957_Moreira2023-06-08T15:45:20Z Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina Simionato, Claudia Gloria Dragani, Walter César Nuñez, Mario Néstor Current measurements Northpatagonian gulfs Wind forced currents diurnal variation numerical model residual flow tidal current time series wind direction wind forcing Atlantic Ocean San Jose Gulf San Matias Gulf Four current time series, collected at costal locations of the San Matías and San Jose' gulfs, Argentina, are analyzed for tidal and residual currents. Tides dominate San Matías Gulf dynamics, accounting for more than 72% of the variance, whereas winds dominate at San José Gulf, explaining approximately 70% of the variance. Tides display a dominating semidiurnal regime, in compliance with what is know from the few tidal stations available and numerical simulations. At San Matías, coastal tidal currents speed increases northward, exceeding 0.6 m 8-1 at San Antonio Este. Higher order harmonics because of nonlinear interactions are large; in every sampled site, M4 and M6 currents are stronger than the diurnal constituents and have amplitudes around 5% of those from M2. At Las Grutas (San Matías Gulf), simultaneous wind observations were collected. Currents respond almost instantaneously to wind variability in the form of two modes. The first one results from winds blowing along the northwest-southeast axis and is very weak; the second one results from winds blowing from any other direction and is characterized by strong meridional currents. Even though bimodal patterns are typical of semienclosed basins, the characteristic wind directions in this gulf are not related with the orientation of its mouth but could result of the circulation in the form of two gyres suggested by numerical simulations. Energy peaks are observed at the 4 to 8 days' band and at around 12 and 20 days. Therefore, currents rapidly respond to wind variability in every timescale, from synoptic to intraseasonal. Fil:Simionato, C.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Dragani, W.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Nuñez, M.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07490208_v25_n4_p957_Moreira http://hdl.handle.net/20.500.12110/paper_07490208_v25_n4_p957_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 |
Current measurements Northpatagonian gulfs Wind forced currents diurnal variation numerical model residual flow tidal current time series wind direction wind forcing Atlantic Ocean San Jose Gulf San Matias Gulf |
| spellingShingle |
Current measurements Northpatagonian gulfs Wind forced currents diurnal variation numerical model residual flow tidal current time series wind direction wind forcing Atlantic Ocean San Jose Gulf San Matias Gulf Simionato, Claudia Gloria Dragani, Walter César Nuñez, Mario Néstor Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| topic_facet |
Current measurements Northpatagonian gulfs Wind forced currents diurnal variation numerical model residual flow tidal current time series wind direction wind forcing Atlantic Ocean San Jose Gulf San Matias Gulf |
| description |
Four current time series, collected at costal locations of the San Matías and San Jose' gulfs, Argentina, are analyzed for tidal and residual currents. Tides dominate San Matías Gulf dynamics, accounting for more than 72% of the variance, whereas winds dominate at San José Gulf, explaining approximately 70% of the variance. Tides display a dominating semidiurnal regime, in compliance with what is know from the few tidal stations available and numerical simulations. At San Matías, coastal tidal currents speed increases northward, exceeding 0.6 m 8-1 at San Antonio Este. Higher order harmonics because of nonlinear interactions are large; in every sampled site, M4 and M6 currents are stronger than the diurnal constituents and have amplitudes around 5% of those from M2. At Las Grutas (San Matías Gulf), simultaneous wind observations were collected. Currents respond almost instantaneously to wind variability in the form of two modes. The first one results from winds blowing along the northwest-southeast axis and is very weak; the second one results from winds blowing from any other direction and is characterized by strong meridional currents. Even though bimodal patterns are typical of semienclosed basins, the characteristic wind directions in this gulf are not related with the orientation of its mouth but could result of the circulation in the form of two gyres suggested by numerical simulations. Energy peaks are observed at the 4 to 8 days' band and at around 12 and 20 days. Therefore, currents rapidly respond to wind variability in every timescale, from synoptic to intraseasonal. |
| author |
Simionato, Claudia Gloria Dragani, Walter César Nuñez, Mario Néstor |
| author_facet |
Simionato, Claudia Gloria Dragani, Walter César Nuñez, Mario Néstor |
| author_sort |
Simionato, Claudia Gloria |
| title |
Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| title_short |
Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| title_full |
Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| title_fullStr |
Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| title_full_unstemmed |
Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina |
| title_sort |
tidal and residual currents observations at the san matías and san josé gulfs, northern patagonia, argentina |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07490208_v25_n4_p957_Moreira http://hdl.handle.net/20.500.12110/paper_07490208_v25_n4_p957_Moreira |
| work_keys_str_mv |
AT simionatoclaudiagloria tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina AT draganiwaltercesar tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina AT nunezmarionestor tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina |
| _version_ |
1768546027831296000 |