Note 77 — Chapter VI · THE PLAIN OF THE PAMPAS

Argentine Mesopotamia, which is a continuation of the Pampean region from the climatological point of view, is also, even in its northern part, without the rigorous dry seasons of the Chaco. Ascending the Paraná, from Corrientes to Posadas, just as in passing from Córdoba to Buenos Aires, one notices that the winter minimum decreases, and a secondary maximum appears in the spring. The predominance of the spring rains, which is a characteristic of southern Brazil, is conspicuous on the middle Uruguay. On the lower part of that river the rain-system approaches that of Buenos Aires, with maxima in spring and autumn, a principal minimum in winter, and a secondary minimum in summer.