Previsores sinótico-meteorológicos para a dispersão de poluentes na região da grande São Paulo / Synoptic-meteorological predictors for the dispersion of air pollutants in the greater Sao Paulo region

AUTOR(ES)
DATA DE PUBLICAÇÃO

1984

RESUMO

Extreme air pollution levels in the "Greater São Paulo" region were related to synoptic scale systems during the 1979-1982 period. Low levels of air pollution are associated, at the surface, with cold fronts over or to the north of São Paulo city, and with cold anticyclones centered to the south. Upper air winds at 250mb were strong (> 25m/s) and in some cases a trough or zonal flow were present at 500mb and 250mb. Circulation was anticyclonic at 50mb. A jet stream was located near the region, and S/SW upper level flow was found to the south of the continent. Reduced pollution levels also occurred associated with weak anticyclonic winds at 250mb and low pressure systems at the surface level (in summer-like situations). ttigh levels of air pollution occurred with cold fronts to the south of São Paulo and prevailing subtropical anticyclones. Weak winds (< 25m/s) at 250mb and anticyclonic circulation at 850mb were also observed. The jet stream was found in the south of the country, and upper winds at the south of the continent were normally from NW. Such patterns were used in a preliminary forecast of potential air pollution, when they proved to be appropriate for this diagnosis and forecast. It was also concluded that GOES satellite imagery and conventional surface charts provide most of the information for analysis and forecast of extreme levels of air pollution.

ASSUNTO(S)

circulacao anticiclonica corrente de jato (meteorologia) meteorologia sinotica meteorologia por satelite frente de superficie são paulo (regiao) poluicao do ar

ACESSO AO ARTIGO

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