Fontes de calor nos tropicos e escoamentos anomalos de larga escala associados com anomalias de precipitacao no nordeste do Brasil / Heat source at the tropics and anomalous runoff of large scale associated with anomaly of precipitation in the northeast Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

1984

RESUMO

An analysis in the monthly departure of the relative vorticily field (æ ) over the globe and monthly departures of the sea surface temperature (SST) in the Tropical Atlantic Ocean is performed for years of droughts and floods over Northeast Brazil, in the period from 1963 to 1980. Planetary scale wavelike patterns were observed in the æ field, similar to those found in previous theoritical and observational studies. Of major interest, it is the phase coherence of the wavelike patterns of circulation anomalies over the Northern Hemisphere and the precipitation regime over Northeast Brazil. Such phase coherence, in addition to the occorrence of SST anomalies in the Tropical Atlantic Ocean (with warver waters in the north and colder in the south of the equator for drought years, and the reverse for flood years), indicates that the existence of global scale wavelike patterns in æ field, as well as the variability of the precipitation regime over Northeast Brazil are, respectively, the remote and local response of the atmosphere to a tropical thermal forcing.

ASSUNTO(S)

temperatura da superficie do mar seca estudos de tempo e do clima teleconexoes atmosfericas propagacao de energia regiao nordeste-brasil anomalias

ACESSO AO ARTIGO

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