Climatic Control FeaturesSouth AmericaTropical Upper Tropospheric Trough
Reference: USAFETAC/TN--92/004, PAG 2-29
“Cavado do Nordeste” (Brasil)
Cold core upper trough that extends from the central South Atlantic to northern Brasil.
Summer phenomenon…reaches maximum amplitude in November-March
Bolivian High/Subtopical Ridge diverts cold polar energy to the north along the coast of Brasil…feeding the TUTT.