Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710
Autor(a) principal: | |
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Data de Publicação: | 2008 |
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/710 |
Resumo: | Temperatures can be correlated by power-law kind functions, and the persistency term can be characterized by a self-correlation function C(t) of temperature variations, where t is the time between observations. This function decreases as C(t) ~ t-γ, where γ represents the correlation exponent. In this work this exponent is obtained by fluctuations analysis of temperature time series in Cascavel area, from 1972 to 2004. It is applied the Detrended Fluctuation Analysis - DFA method, which becomes useful to detect long range correlations and allows to obtain the exponents for local scale rules. These exponents can be compared with those obtained in other areas of the planet. Through this method the Hurst exponent H is obtained which is related with γ by γ = 2 (1 – H). The value γ =0,74 obtained here is in the superior limit of the values range presented in the literature for other places around the world. |
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Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710Correlação em séries temporais de temperatura na região de Cascavel, Estado do Paraná - DOI: 10.4025/actascitechnol.v29i2.710Detrended Fluctuation Analysisséries temporaisséries correlacionadastemperatura7.06.00.00-7 GeografiaTemperatures can be correlated by power-law kind functions, and the persistency term can be characterized by a self-correlation function C(t) of temperature variations, where t is the time between observations. This function decreases as C(t) ~ t-γ, where γ represents the correlation exponent. In this work this exponent is obtained by fluctuations analysis of temperature time series in Cascavel area, from 1972 to 2004. It is applied the Detrended Fluctuation Analysis - DFA method, which becomes useful to detect long range correlations and allows to obtain the exponents for local scale rules. These exponents can be compared with those obtained in other areas of the planet. Through this method the Hurst exponent H is obtained which is related with γ by γ = 2 (1 – H). The value γ =0,74 obtained here is in the superior limit of the values range presented in the literature for other places around the world.Temperaturas podem ser correlacionadas por funções tipo leis de potência, e o termo de persistência pode ser caracterizado por uma função de autocorrelação C (t) de variações de temperatura, e t é o tempo entre as observações. Esta função decai como C(t) ~ t-γ em que γ representa o expoente de correlação. Neste trabalho, este expoente é obtido por meio da análise de flutuações em séries temporais de temperatura média, máxima e mínima, na região de Cascavel, Estado do Paraná, no período de 1972 a 2004. Foi utilizado o método Detrended Fluctuation Analysis - DFA, que se mostrou útil para detectar correlações de longa duração e também permitiu obter os expoentes para leis de escala locais e que podem ser comparados aos obtidos em outras regiões do planeta. Por meio deste método foi obtido o expoente de Hurst (H), o qual está relacionado com γ por γ = 2 (1 – H). O valor γ =0,74 obtido, neste trabalho, encontra-se no limite superior da faixa de valores apresentados na literatura para outras regiões do planeta.Universidade Estadual De Maringá2008-02-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/71010.4025/actascitechnol.v29i2.710Acta Scientiarum. Technology; Vol 29 No 2 (2007); 205-208Acta Scientiarum. Technology; v. 29 n. 2 (2007); 205-2081806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/710/372Pedron, Isabel Tamarainfo:eu-repo/semantics/openAccess2024-05-17T13:02:30Zoai:periodicos.uem.br/ojs:article/710Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:30Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 Correlação em séries temporais de temperatura na região de Cascavel, Estado do Paraná - DOI: 10.4025/actascitechnol.v29i2.710 |
title |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
spellingShingle |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 Pedron, Isabel Tamara Detrended Fluctuation Analysis séries temporais séries correlacionadas temperatura 7.06.00.00-7 Geografia |
title_short |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
title_full |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
title_fullStr |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
title_full_unstemmed |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
title_sort |
Correlation in temperature time series in Cascavel, Paraná State - DOI: 10.4025/actascitechnol.v29i2.710 |
author |
Pedron, Isabel Tamara |
author_facet |
Pedron, Isabel Tamara |
author_role |
author |
dc.contributor.author.fl_str_mv |
Pedron, Isabel Tamara |
dc.subject.por.fl_str_mv |
Detrended Fluctuation Analysis séries temporais séries correlacionadas temperatura 7.06.00.00-7 Geografia |
topic |
Detrended Fluctuation Analysis séries temporais séries correlacionadas temperatura 7.06.00.00-7 Geografia |
description |
Temperatures can be correlated by power-law kind functions, and the persistency term can be characterized by a self-correlation function C(t) of temperature variations, where t is the time between observations. This function decreases as C(t) ~ t-γ, where γ represents the correlation exponent. In this work this exponent is obtained by fluctuations analysis of temperature time series in Cascavel area, from 1972 to 2004. It is applied the Detrended Fluctuation Analysis - DFA method, which becomes useful to detect long range correlations and allows to obtain the exponents for local scale rules. These exponents can be compared with those obtained in other areas of the planet. Through this method the Hurst exponent H is obtained which is related with γ by γ = 2 (1 – H). The value γ =0,74 obtained here is in the superior limit of the values range presented in the literature for other places around the world. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-02-12 |
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/710 10.4025/actascitechnol.v29i2.710 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/710 |
identifier_str_mv |
10.4025/actascitechnol.v29i2.710 |
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/710/372 |
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 29 No 2 (2007); 205-208 Acta Scientiarum. Technology; v. 29 n. 2 (2007); 205-208 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_ |
1799315331484745728 |