chapter - Atmospheric and Oceanic Science

La Plata basin climatology
Fig. 2.8. Southern Planalto a) Location. Rainfall regime at: b) central-eastern region (River Iguazú basin)
c) at the west d) at the south of the Planalto, where a shift of the spring maximum can be noticed by the
end of winter.
by descending currents from cumulonimbus, tornados, in general as by-products of
the activity of Mesoscale Convective Systems. There is a great interannual and
intraseasonal variability and the annual isohyets have a noticeable North-South orientation,
slanted toward the Southwest in the most southern region. The general orientation
is indicative of the transition regime, between the Great Chaco minimums
(1400 mm).
2.3.6. Eastern Uruguay and South of Rio Grande do Sul
It is a transition region, with a very high variability both intra and interseasonal,
and fluctuating monthly rainfall, although in general the intermediate seasons
are those with more rain. The annual mean is in the order of 1600 mm in the North
and of 1200 mm in the South.
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