Riverine Flow and Lake Level Variability in Southern South America

DEPETRIS, P.J., PASQUINI, A. I.

EOS TRANSACTIONS - AMERICAN GEOPHYSICAL UNION

AMERICAN GEOPHYSICAL UNION

Año: 2008 vol. 89 p. 254 - 255

0096-3941

During the 1920s, climatic variability over southern South America aroused interest and debate due to the groundbreaking work of Walker´s group that sought to establish -among other significant goals- the connection between the Southern Oscillation (SO) and rainfall over southern Brazil, Paraguay, and northern Argentina [Mossman, 1924]. Along with other interesting studies, they made the observation -then seen with skepticism- that positive Paraná River discharge departures at the downstream Rosario gagging station, in Argentina, tended to occur during the negative phase of the SO, when surface level pressure (SLP) was anomalously high in the region of Australia [Bliss, 1928]. This idea subsided somewhat during the following decades until Bjerknes [1966], Berlage[1966] and others established the now widely-known linkage between the SO and El Niño events, jointly known as the ENSO. Many and valued works have expanded our knowledge on such a complex process, particularly since the early 1980s, precisely when one of the strongest ENSO events ever, occurred in the Equatorial Pacific.