Southern Brazil rainfall variability
Autor(a) principal: | |
---|---|
Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Acta scientiarum. Technology (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2501 |
Resumo: | Seasonal and annual rainfall fluctuations were studied in the Brazilian states of São Paulo, Paraná, Santa Catarina and Rio Grande do Sul, using DNAEE (Departamento Nacional de Águas e Energia Elétrica) e DAEE (Departamento de Águas e Energia Elétrica) data, from 1960 to 1991. The aims were to establish a precipitation seasonal scale model in each State and to understand its variability during wet and dry periods, through different statistical (descriptions) methods. The deterministic processes were filtered as, for instance, the highly pronounced annual cycle. Spectral analysis was used to obtain new series in which unknown processes were shown. The studied precipitation got maximum values in the wet period and minimum values in the dry period in São Paulo, coastal and northeastern Paraná and Santa Catarina coast. In the continentals Paraná and Santa Catarina, and in all Rio Grande do Sul, the precipitation structure was homogeneous. The variability after filtering showed that the series were essentially dominated by randon processes. Persistence, when present, is given by annual wave. |
id |
UEM-6_e50412b870cf2be6430527e09053a323 |
---|---|
oai_identifier_str |
oai:periodicos.uem.br/ojs:article/2501 |
network_acronym_str |
UEM-6 |
network_name_str |
Acta scientiarum. Technology (Online) |
repository_id_str |
|
spelling |
Southern Brazil rainfall variabilityVariabilidade da precipitação no Brasil MeridionalprecipitaçãoespectrovariabilidadeBrasil Meridional1.05.00.00-6 FísicaSeasonal and annual rainfall fluctuations were studied in the Brazilian states of São Paulo, Paraná, Santa Catarina and Rio Grande do Sul, using DNAEE (Departamento Nacional de Águas e Energia Elétrica) e DAEE (Departamento de Águas e Energia Elétrica) data, from 1960 to 1991. The aims were to establish a precipitation seasonal scale model in each State and to understand its variability during wet and dry periods, through different statistical (descriptions) methods. The deterministic processes were filtered as, for instance, the highly pronounced annual cycle. Spectral analysis was used to obtain new series in which unknown processes were shown. The studied precipitation got maximum values in the wet period and minimum values in the dry period in São Paulo, coastal and northeastern Paraná and Santa Catarina coast. In the continentals Paraná and Santa Catarina, and in all Rio Grande do Sul, the precipitation structure was homogeneous. The variability after filtering showed that the series were essentially dominated by randon processes. Persistence, when present, is given by annual wave.Foram estudadas as flutuações na escala anual e sazonal das precipitações no Brasil Meridional (São Paulo, Paraná, Santa Catarina e Rio Grande do Sul), utilizando-se dados do Departamento Nacional de Água e Energia Elétrica (DNAEE) e do Departamento de Águas e Energia Elétrica (DAEE), no período de 1960-91. Na escala sazonal buscou-se tipificar a precipitação em cada Estado e entender a sua variabilidade no período chuvoso e no período seco, utilizando diferentes ferramentas estatísticas (média, desvio padrão e análise harmônica). Filtraram-se os processos determinísticos conhecidos (ciclo anual, semi-anual, por exemplo), usando análise harmônica para se obter novas séries nas quais os outros processos não conhecidos estivessem presentes. A precipitação na região estudada apresentou característica marcada de máximos no período úmido e mínimo no período seco, em São Paulo, no Paraná (no litoral e no nordeste) e na parte litorânea de Santa Catarina. Na parte continental do Paraná e de Santa Catarina e no Rio Grande do Sul, a precipitação é mais homogênea. A variabilidade estudada, logo após a utilização do filtro, mostrou que as séries são dominadas essencialmente por processos aleatórios e que toda a persistência está dada pela onda anual, quando existente.Universidade Estadual De Maringá2008-04-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/250110.4025/actascitechnol.v24i0.2501Acta Scientiarum. Technology; Vol 24 (2002); 1687-1695Acta Scientiarum. Technology; v. 24 (2002); 1687-16951806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2501/1566Nery, Jonas TeixeiraMartins, Maria de Lourdes Orsini FernandesNeto Sant'Ana, João Limainfo:eu-repo/semantics/openAccess2024-05-17T13:02:45Zoai:periodicos.uem.br/ojs:article/2501Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:45Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Southern Brazil rainfall variability Variabilidade da precipitação no Brasil Meridional |
title |
Southern Brazil rainfall variability |
spellingShingle |
Southern Brazil rainfall variability Nery, Jonas Teixeira precipitação espectro variabilidade Brasil Meridional 1.05.00.00-6 Física |
title_short |
Southern Brazil rainfall variability |
title_full |
Southern Brazil rainfall variability |
title_fullStr |
Southern Brazil rainfall variability |
title_full_unstemmed |
Southern Brazil rainfall variability |
title_sort |
Southern Brazil rainfall variability |
author |
Nery, Jonas Teixeira |
author_facet |
Nery, Jonas Teixeira Martins, Maria de Lourdes Orsini Fernandes Neto Sant'Ana, João Lima |
author_role |
author |
author2 |
Martins, Maria de Lourdes Orsini Fernandes Neto Sant'Ana, João Lima |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Nery, Jonas Teixeira Martins, Maria de Lourdes Orsini Fernandes Neto Sant'Ana, João Lima |
dc.subject.por.fl_str_mv |
precipitação espectro variabilidade Brasil Meridional 1.05.00.00-6 Física |
topic |
precipitação espectro variabilidade Brasil Meridional 1.05.00.00-6 Física |
description |
Seasonal and annual rainfall fluctuations were studied in the Brazilian states of São Paulo, Paraná, Santa Catarina and Rio Grande do Sul, using DNAEE (Departamento Nacional de Águas e Energia Elétrica) e DAEE (Departamento de Águas e Energia Elétrica) data, from 1960 to 1991. The aims were to establish a precipitation seasonal scale model in each State and to understand its variability during wet and dry periods, through different statistical (descriptions) methods. The deterministic processes were filtered as, for instance, the highly pronounced annual cycle. Spectral analysis was used to obtain new series in which unknown processes were shown. The studied precipitation got maximum values in the wet period and minimum values in the dry period in São Paulo, coastal and northeastern Paraná and Santa Catarina coast. In the continentals Paraná and Santa Catarina, and in all Rio Grande do Sul, the precipitation structure was homogeneous. The variability after filtering showed that the series were essentially dominated by randon processes. Persistence, when present, is given by annual wave. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-04-22 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2501 10.4025/actascitechnol.v24i0.2501 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2501 |
identifier_str_mv |
10.4025/actascitechnol.v24i0.2501 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2501/1566 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Technology; Vol 24 (2002); 1687-1695 Acta Scientiarum. Technology; v. 24 (2002); 1687-1695 1806-2563 1807-8664 reponame:Acta scientiarum. Technology (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta scientiarum. Technology (Online) |
collection |
Acta scientiarum. Technology (Online) |
repository.name.fl_str_mv |
Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
||actatech@uem.br |
_version_ |
1799315332126474240 |