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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Moreira, D., Simionato, C.G., Dragani, W.C., Nuñez, M.N.
Formato: JOUR
Materias:
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
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_07490208_v25_n4_p957_Moreira
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_07490208_v25_n4_p957_Moreira
record_format dspace
spelling todo:paper_07490208_v25_n4_p957_Moreira2023-10-03T15:39:08Z Tidal and residual currents observations at the San Matías and San José Gulfs, Northern Patagonia, Argentina Moreira, D. Simionato, C.G. Dragani, W.C. Nuñez, M.N. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Moreira, D.
Simionato, C.G.
Dragani, W.C.
Nuñez, M.N.
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.
format JOUR
author Moreira, D.
Simionato, C.G.
Dragani, W.C.
Nuñez, M.N.
author_facet Moreira, D.
Simionato, C.G.
Dragani, W.C.
Nuñez, M.N.
author_sort Moreira, D.
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
url http://hdl.handle.net/20.500.12110/paper_07490208_v25_n4_p957_Moreira
work_keys_str_mv AT moreirad tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina
AT simionatocg tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina
AT draganiwc tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina
AT nunezmn tidalandresidualcurrentsobservationsatthesanmatiasandsanjosegulfsnorthernpatagoniaargentina
_version_ 1807322292753006592

Ejemplares similares