O El Nino de 1982-83 e a Precipitação Sobre a América do Sul

Mary T. Kayano, Anto­nio D. Moura

Abstract


ABSTRACT

The large-scale regional aspects of the 1982-83 El Niño are discussed relating the precipitation anomaly patterns observed over South America with results from diagnostic and theoretical works. Long-lasting and very intense floods have occurred in southern parts of Brazil, northern Argentina, Paraguay, Uruguay and southern Bolivia, mainly during the period May-July 1983. Also, severe droughts have striken Northeastern Brazil including the Amazon region. Ecuador and northwestern Peru suffered flood conditions from the end of 1982 until August of 1983. The GCM simulations reproduced the principal aspects of the atmospheric circulation. Theoretical results suggested that the precipitation anomalies observed over South America can be explained as the atmospheric response to a heating source over the eastern Pacific associated with the El Niño.


Keywords


El Niño; América do Sul; precipitação; South America; rainfall.



DOI: http://dx.doi.org/10.22564/rbgf.v4i2.1055










Revista Brasileira de Geofísica (printed version): ISSN 0102-261X
v.1n.1 (1982) – v.33n.1 (2015)

Revista Brasileira de Geofísica (online version): ISSN 1809-4511
v.15n.1 (1997) – v.29n.4 (2011)

Brazilian Journal of Geophysics (online version
a partir de v.30n.1 (2012)



Brazilian Journal of Geophysics - BrJG

Sociedade Brasileira de Geofísica - SBGf
Av. Rio Branco 156 sala 2509
Rio de Janeiro, RJ, Brazil
Phone/Fax: +55 21 2533-0064
E-mail: editor@sbgf.org.br