Long-term trends and variability of tidal levels and constituents at Buenos Aires and Mar del Plata, Argentina

Abstract

Changes in the tides have been reported globally with large-scale ocean processes appearing to be the cause. Nevertheless, different trends in both tidal levels and constituents have been observed in different regions, suggesting that regional and local factors can play an important role. We present an analysis of the long-term trends and variability of 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).