Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
권호 표지

Severe Weather Events over Northeastern Brasil:The January 2004 Event

브라질 북동부 해안의 악기상: 2004년 1월 사례

  • Published : 2006.05.01

Abstract

The eastern coast of northeastern Brazil (NEB), a coastal land-strip up to 300 km wide and stretching out from Rio Grande do Norte $(5^{\circ}S)$ State down to the south of Bahia State $(17^{\circ}S)$, experiences different rain producing systems, such as distrubances in the south-east trade winds, frontal systems penetration, land-sea breeze circulation and local convection associated with the topography and moisture flux convergence. The annual total rainfall ranges from 600 inland to 3000 mm on the coast. Rainfall totals 5 to 12 times the focal climatic means were recorded in various regions of Alagoas state in January 2004. It was estimated that 46,000 people were homeless, with material damages exceeding US$10 million as a consequence of the ensuing floods. GOES infrared images analysis showed that the main weather system responsible for this anomalously high rainfall totals was an Upper Troposphere Cyclonic Vortex (UTCV), which formed at about a $27^{\underline{\circ}}W\;e\;12^{\underline{\circ}}S$ and remained active for the entire month of January over NEB.

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References

  1. Gan, M. A., 1982: Urn Estudo Observacional sobre as Baixas Frias da Alta Troposfera, nas Latitudes Subtropicais do Atlantico Sui e Leste do Brasil (An Observational Study of Cold Lows in the High Troposphere in Subtropical South Atlantic and Brazil's Eastern Latitudes),MSc Dissertation in Meteorology, Sao Jose dos Campos, INPE, 105pp
  2. Kousky, V. E. and M. A. Gan, 1981: Upper tropospheric cyclonic vortices in the tropical South Atlantic, Tellus, 33 (6),538-551 https://doi.org/10.1111/j.2153-3490.1981.tb01780.x
  3. Molion, L. C. B. and, S. O. Bernardo, 2002: Uma revisao da dinamica das chuvas no Nordeste Brasileiro (A review of the dynamics of rainfall over Northeastern Brazil), Braz. J. of Meteor., 17(1),1-10
  4. Palmer, C. E., 1951: On high-level cyclones originating in the tropics, Transa. of Ame. Geoph. Union, 32 (5), 683-695 https://doi.org/10.1029/TR032i005p00683
  5. Ramires, M. C. V.,1996: Padroes Climaticos dos Vortices Ciclonicos de Altos Niveis no Nordeste do Brasil. MSc Dissertation in Meteorology, Instituto Nacional de Pesquisas Espaciais (INPE), 82pp