Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina

We present an analysis of the long-term trends and variability of extreme water and tidal levels and the main tidal constituents using long-term records from two tide gauges in the wider region of the Rio de la Plata estuary: Buenos Aires (1905-2013) and Mar del Plata (1956-2013). We find significan...

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Autores principales: Santamaria Aguilar, Sara, Schuerch, Mark, Vafeidis, Athanasios T., Carretero, Silvina Claudia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Argentina
Buenos Aires
Mar del Plata
Sea-level
Secular trends
Tide
Variability
Water level
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87249
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87249
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Argentina
Buenos Aires
Mar del Plata
Sea-level
Secular trends
Tide
Variability
Water level
spellingShingle Ciencias Naturales
Argentina
Buenos Aires
Mar del Plata
Sea-level
Secular trends
Tide
Variability
Water level
Santamaria Aguilar, Sara
Schuerch, Mark
Vafeidis, Athanasios T.
Carretero, Silvina Claudia
Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
topic_facet Ciencias Naturales
Argentina
Buenos Aires
Mar del Plata
Sea-level
Secular trends
Tide
Variability
Water level
description We present an analysis of the long-term trends and variability of extreme water and tidal levels and the main tidal constituents using long-term records from two tide gauges in the wider region of the Rio de la Plata estuary: Buenos Aires (1905-2013) and Mar del Plata (1956-2013). We find significant long-term trends in both tidal levels and the main tidal constituents (M2, S2, K1, O1, and the overtide M4) from a running harmonic analysis in both locations. The tidal range decreased on average 0.63 mm y<sup>-1</sup>, as a result of an increase of the low water levels and a decrease of the high water levels. We also find a secular decrease in the amplitude of the semi-diurnal constituents and an increase of the diurnal ones, but of different magnitudes at each location, which suggests that different processes are producing these changes. In Buenos Aires, an increase of river discharge into the estuary seems to reduce the tidal range by hampering the propagation of the tidal wave into the estuary, whereas no influence of river discharge on water and tidal levels can be detected in Mar del Plata. We believe that other factors such as thermohaline changes or the rise of mean sea-level may be responsible for the observed tidal range decrease. Despite the tidal long-term trends, we find no significant trends in the meteorological component of the tide-gauge records other than an increase in the mean sea-level. In addition, we explore teleconnections between the variability of the meteorological component of the tide-gauge records and climate drivers.
format Articulo
Articulo
author Santamaria Aguilar, Sara
Schuerch, Mark
Vafeidis, Athanasios T.
Carretero, Silvina Claudia
author_facet Santamaria Aguilar, Sara
Schuerch, Mark
Vafeidis, Athanasios T.
Carretero, Silvina Claudia
author_sort Santamaria Aguilar, Sara
title Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
title_short Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
title_full Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
title_fullStr Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
title_full_unstemmed Long-term trends and variability of water levels and tides in Buenos Aires and Mar del Plata, Argentina
title_sort long-term trends and variability of water levels and tides in buenos aires and mar del plata, argentina
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87249
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AT vafeidisathanasiost longtermtrendsandvariabilityofwaterlevelsandtidesinbuenosairesandmardelplataargentina
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