Evento Extremo De Chuva No Rio De Janeiro: Análise Sinótica, Previsão Numérica E Comparação Com Eventos Anteriores

Andrade, Kelen Martins; Pinheiro, Henri Rossi; Dolif, Giovanni

doi:10.5902/2179460x16236

Cited by 6 publications

(4 citation statements)

References 5 publications

(5 reference statements)

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“…Na RSRJ, vários estudos numéricos e observacionais têm sido realizados com o objetivo de compreender melhor a circulação atmosférica e a influência nos padrões de chuva na região (Chou et al, 2006). Andrade et al (2015) mostraram por meio do uso MeDPat (Método para Detecção de Padrões Atmosféricos) que a orografia da RSRJ favorece a intensificação da atividade convectiva, principalmente quando os ventos estão perpendiculares à costa.…”

Section: Introductionunclassified

Regime de Vento na Serra do Mar - Rio de Janeiro, Brasil

Sobral

Júnior

Góis

et al. 2018

Rev. bras. meteorol.

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Resumo O objetivo deste estudo é avaliar o regime de vento nas estações meteorológicas dos municípios de Duque de Caxias e Petrópolis localizadas, respectivamente, na base (A603) e no topo (A610) da Serra do Mar - Rio de Janeiro, Brasil. O WRPLOT foi usado na elaboração das rosas de vento e histogramas. Comparou-se a persistência da direção do vento e com o número de dias com chuvas (NDC) a partir do boxplot. De modo geral o teste de sequência indica que as séries temporais anuais e mensais de ventos estão dentro da normalidade. As predominâncias da direção do vento foram identificadas em A603 como SSE (36,22%), SE (24,98%) e S (18,71%). Nesta estação a intensidade do vento foi majoritariamente classificada como calmaria (87,33%), apresentando ainda a predominância de ventos fracos que variam entre bafagem (8,80%) e aragem (3,90%). As predominâncias na estação A610 foram WSW (21,57%), NW (17,53%), WNW (10,81%) e NNW (7,66%), com variação de classes de velocidade de ventos e sem registro de calmaria. A correlação entre as direções cardinais em cada estação com o NDC mostrou que a estação A603 registrou as direções SSE, S e SE, devido ao efeito barreira gerado pela face S/SW (barlavento) da Serra do Mar, enquanto a estação A610 registrou chuvas associadas às direções NW, WNW e WSW.

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Section: Introductionunclassified

Regime de Vento na Serra do Mar - Rio de Janeiro, Brasil

Sobral

Júnior

Góis

et al. 2018

Rev. bras. meteorol.

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“…As a consequence of the position of the BP relative to the cold front trajectory, the Plateau is able to affect both the displacement and the structure of the fronts that remain active until they reach the subtropical latitudes of South America (Lima and Fernandez, 2011;Andrade et al, 2015). Seluchi et al (2011) conducted simulations of a stationary cold front, which caused persistent rainfall and landslides in the coastal part of the BP.…”

Section: Introductionmentioning

confidence: 99%

Interaction of cold fronts with the Brazilian Plateau: a climatological analysis

Foss

Chou

Seluchi

2016

Intl Journal of Climatology

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Complex orography of elevated terrain and numerous peaks can act as an important physical barrier to the atmospheric flow and can generate a range of meteorological phenomena. The objective of this study is to investigate the effect of the Brazilian Plateau on the spatial distribution of cold fronts and their climatology for the period between 1979 and 2010 using Climate Forecast System Reanalysis data. The cold fronts are detected and divided into three groups, according to their frequency and trajectory over South America: the continental fronts are referred to as the AN group; the fronts that pass over the coastal region of São Paulo are referred to as the SP group; and the fronts that pass over the two areas are referred to as the ANSP group. Composites of means and anomalies of atmospheric variables are constructed for each group. The investigation focuses on the orographic effects of the Brazilian Plateau on the climatology of the cold fronts. The Brazilian Plateau affects the spatial distribution of maximum and minimum frontal frequency. The number of cold fronts over the elevated regions of the Brazilian Plateau is significantly lower than in the surrounding regions. The maximum frontal frequency is found to the east of the Andes and a secondary maximum is found along the Southeast coast of Brazil. The main effect of the Brazilian Plateau on the mean and anomaly fields of meteorological variables is to block the dry and cool post‐frontal air at lower atmospheric levels. The most significant anomalies are found in the ANSP group of cold fronts, which are more intense and move more rapidly eastward. On the other hand, the AN cold front group is the most frequent, but the weakest and easily affected by the Brazilian Plateau orography.

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“…Among the meteorological systems that affect the Southeast Region of Brazil and the adjacent ocean, the cold fronts are one of the most important because they generally cause significant weather changes and occur more frequently than other transients (Satyamurty et al, 1998;Cavalcanti and Kousky, 2009). During the passage of an intense cold front, it is common to observe an increase in wind speed and change in its direction, an increase in cloudiness, besides heavy rains (Cavalcanti and Kousky, 2009;Andrade et al, 2015;Dereczynski and Menezes, 2015;Bonnet et al, 2018;Dereczynski et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Frontal Systems Responsible for Intense Winds in the Santos Basin, Brazilian Southeast Offshore Region

et al. 2023

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This work aimed to identify the synoptic conditions associated with the Frontal Systems (FSs) passage that causes intense winds in the Santos Basin (SB). Furthermore, the atmospheric characteristics of the FSs, which generated intense (INTW) and moderate (MODW) winds in the studied area were identified. For this purpose, INTW and MODW composites of FSs episodes were elaborated. First, the INTW and MODW cases were selected from the 10 meters wind intensity (W10M) observed in the Santos buoy, belonging to Brazil's National Buoys Program. Satellite images and synoptic surface charts were analyzed to identify the synoptic systems responsible for INTW and MODW in the Santos buoy, keeping only the cases generated by FSs. From the comparison between the INTW and MODW composites, it was possible to observe in INTW: i) a stronger pressure gradient over the SB, which caused the intense winds registered in the buoy; ii) a baroclinic trough at medium and high levels reaching the SB region, and located westward of the surface system; iii) stronger 1000-500 hPa layer thickness and dew point temperature gradients over the continent, reaching the SB region, indicating the position of the FS and iv) a colder and drier air mass over southern Brazil. In large scale, the Rossby wave tracings were analyzed, where different wavenumbers were noticed for each composite. In INTW, the wavenumber was 2, while in MODW, it was 2 and 3. For case studies of INTW and MODW, the main characteristics found in the respective composites were observed.

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Evento Extremo De Chuva No Rio De Janeiro: Análise Sinótica, Previsão Numérica E Comparação Com Eventos Anteriores

Cited by 6 publications

References 5 publications

Regime de Vento na Serra do Mar - Rio de Janeiro, Brasil

Regime de Vento na Serra do Mar - Rio de Janeiro, Brasil

Interaction of cold fronts with the Brazilian Plateau: a climatological analysis

Frontal Systems Responsible for Intense Winds in the Santos Basin, Brazilian Southeast Offshore Region

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