Distribuição Temporal das Precipitações no Município do Recife (Temporal Distribution of Rainfall in the Recife City)
DOI:
https://doi.org/10.26848/rbgf.v6.2.p245-252Keywords:
distribuição temporal da precipitação, brisas, cidade do RecifeAbstract
As brisas são mecanismos tropicais de mesoescala que quando associados aos mecanismos de grande escala como a Zona de Convergência Intertropical (ZCIT) e sistemas frontais provocam chuvas concentradas no litoral da Região Metropolitana do Recife (RMR) durante o inverno. Estes fenômenos climáticos quando atuam nas áreas de risco de morros dentro dos centros urbanos provocam acúmulo de precipitação e deslizamentos de terras, muitas vezes ocasionando mortes. A pesquisa tem como objetivo estudar a distribuição horária da precipitação pluviométrica entre os anos de 2000 e 2007 no Município do Recife, buscando correlações com o seu principal mecanismo de formação. Para tal foram usados os dados do pluviômetro e do pluviógrafo da estação Recife/Afogados os quais foram validados a partir da comparação entre eles. Os pluviogramas foram digitalizados e foram construídos gráficos comparando os totais anuais de precipitação do pluviógrafo com os do pluviômetro e se mostraram satisfatórios já que apresentaram erros menores que 5%. Assim, a partir destes dados foram gerados gráficos de frequência de eventos por faixa horária do dia para cada ano da análise. O período do dia com maior intensidade de chuvas foi entre 23 horas da noite e 7 horas da manhã e o intervalo de hora que mais ocorreu registros de chuva foi entre 6 horas e 7 horas da manhã. Concluiu-se que as brisas terrestres colaboram para a precipitação na cidade do Recife já que os eventos de chuva se concentram entre a noite (principalmente a madrugada) e o início da manhã, fase do dia em que este mecanismo atua mais intensamente.
The tropical breezes are mesoscale mechanisms that when mechanism related to large scales the Intertropical Convergence Zone (ITCZ) and frontal systems cause rains concentrated on the coast of the Metropolitan Regionof Recife (MRR)during the winter. These weather phenomena when act in areas at risk of hills in towns causing accumulation of rainfall and lands lides, often causing deaths. The research aims to study thedistributionofhourlyrainfallbetweenthe years 2000and 2007in the cityof Recife, seeking correlations with its main formation mechanism. Tothis end, weuseddata from therain gaugeandrain gauge charts station Recife/Afogados, which were validatedby comparingthem.The pluviograms were scanned and were constructed graphs comparing the total annual precipitation from rain gauge charts with the rain gauge and proved satisfactory as it had errors of less than 5%. Thus, from these data were generated graphics frequency of events per time band for each day of the year analysis. Thetime of daywith the highestintensityof rainfall was between 11:00 PM and 7:00 AM and the time interval over which records rainfall occurred was between 6:00AM and 7:00 AM. It was concluded that the land breezes collaborate to precipitation in the Recife City since the rainfall events are concentrated between night (mostly night) and early morning, the day phase in which this mechanism acts more intensely.
Keywords: temporal distribution of rainfall, breezes, Recife City.
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Copyright (c) 2013 Rodrigo Diniz Albuquerque, Carlos Eduardo de Oliveira Dantas, Elaine Lima Araújo, Talitha Lucena Vasconcelos
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