Análise multifractal da precipitação na área costeira de Pernambuco, Brasil

Autores

DOI:

https://doi.org/10.33448/rsd-v10i2.12424

Palavras-chave:

Precipitação; Mudança climática; Multifractal.

Resumo

O aquecimento global e as mudanças climáticas são as principais preocupações dos cientistas, engenheiros e legisladores, porque afetam todos os aspectos da natureza e da vida humana. A precipitação e a temperatura do ar são as variáveis mais importantes para detectar as alterações climáticas, através da análise estatística de um conjunto de índices que descrevem os extremos de temperatura e precipitação. Nas últimas décadas, conceitos e métodos da ciência de sistemas complexos foram aplicados na análise de dados hidrológicos para descrever a variabilidade dos processos hidrológicos em múltiplas escalas temporais e espaciais. Neste trabalho, analisamos séries temporais de precipitação diária em Recife, Brasil (durante o período de 1962 a 2019) usando a análise Multifractal Detrended Fluctuation Analysis (MFDFA) a fim de estudar correlações de longo prazo em subconjuntos de pequenas e grandes flutuações de chuva. Calculamos parâmetros multifractais (que quantificam a posição de máximo, largura e assimetria do espectro multifractal) que estão relacionados a diferentes propriedades das flutuações da precipitação. Ao comparar os valores desses parâmetros para dois subperíodos de 29 anos, descobrimos que, após 1990, a dinâmica da chuva mudou para uma persistência mais forte, multifractalidade mais fraca e diminuição da dominância de pequenas flutuações.

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Publicado

08/02/2021

Como Citar

BARRETO, I. D. de C.; STOSIC, . T. . Análise multifractal da precipitação na área costeira de Pernambuco, Brasil. Research, Society and Development, [S. l.], v. 10, n. 2, p. e15410212424, 2021. DOI: 10.33448/rsd-v10i2.12424. Disponível em: https://rsdjournal.org/index.php/rsd/article/view/12424. Acesso em: 17 jul. 2024.

Edição

Seção

Ciências Exatas e da Terra