Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFPel - Guaiaca |
Texto Completo: | http://repositorio.ufpel.edu.br/handle/ri/2185 |
Resumo: | In this paper the results of Cold and heat waves and their relationships with to El Niño and La Niña events in 13 meteorological stations in Rio Grande do Sul along the years of 1967 up to 2005 are presented. Daily frost and maximum and minimum air temperature data were used. The anomalies were obtained subtracting the average year (climatological normal to the data set) of each year which was analyzed. Cold waves were considered the period of five or more days of consecutive negative minimum temperature and hot waves for the same time but in positive anomalies and maximum temperature. It was also used a quantil technique to split in quartile segments the highest anomalies values and the anomalies interval values of each wave in order to classify them according to its intensity and termic amplitude respectively. Only the waves of five days were classified. Analyzing the waves average behavior it was observed that the cold ones happen more in the winter and that there is an homogeneity related to its distribution in the state. On the other hand, the heat waves happen also in the colder months, but their distribution is heterogeneous, happening more in the meteorological stations located more in the northern part of the state. The relationships between frosts and waves it was noticed that there is a positive correlation between the frosts average number and the cold waves and negatives average number to the heat ones, statistically significant at 1% level in the months of June and July, but not in August. The relationships between cold and heat waves and the ENSO events show that, in general, the occurrence of La Niña increases the number of cold waves and decreases the heat waves in Rio Grande do Sul, while the El Niño increases the heat waves and decreases the cold waves. It was also analyzed the frost relationships with ENSO events and it was noted that in the months of June and July there is a higher occurrence of frosts during La Niñas. However, in August this occurrence is higher during El Niños |
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2014-08-20T14:25:47Z2008-04-092014-08-20T14:25:47Z2008-02-15FIRPO, Mári Andrea Feldman. Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña . 120 f. Dissertação (Mestrado em Meteorologia) - Universidade Federal de Pelotas, Pelotas, 2008.http://repositorio.ufpel.edu.br/handle/ri/2185In this paper the results of Cold and heat waves and their relationships with to El Niño and La Niña events in 13 meteorological stations in Rio Grande do Sul along the years of 1967 up to 2005 are presented. Daily frost and maximum and minimum air temperature data were used. The anomalies were obtained subtracting the average year (climatological normal to the data set) of each year which was analyzed. Cold waves were considered the period of five or more days of consecutive negative minimum temperature and hot waves for the same time but in positive anomalies and maximum temperature. It was also used a quantil technique to split in quartile segments the highest anomalies values and the anomalies interval values of each wave in order to classify them according to its intensity and termic amplitude respectively. Only the waves of five days were classified. Analyzing the waves average behavior it was observed that the cold ones happen more in the winter and that there is an homogeneity related to its distribution in the state. On the other hand, the heat waves happen also in the colder months, but their distribution is heterogeneous, happening more in the meteorological stations located more in the northern part of the state. The relationships between frosts and waves it was noticed that there is a positive correlation between the frosts average number and the cold waves and negatives average number to the heat ones, statistically significant at 1% level in the months of June and July, but not in August. The relationships between cold and heat waves and the ENSO events show that, in general, the occurrence of La Niña increases the number of cold waves and decreases the heat waves in Rio Grande do Sul, while the El Niño increases the heat waves and decreases the cold waves. It was also analyzed the frost relationships with ENSO events and it was noted that in the months of June and July there is a higher occurrence of frosts during La Niñas. However, in August this occurrence is higher during El NiñosNeste trabalho são apresentados os resultados do estudo feito sobre a ocorrência de ondas de frio e calor e suas relações com El Niño e La Niña, em 13 estações meteorológicas do Rio Grande do Sul para o período entre os anos de 1967 a 2005. As anomalias foram obtidas subtraindo-se o ano médio (normal climatológica para a série de dados) de cada ano em questão. Foram consideradas ondas de frio, os períodos de cinco ou mais dias consecutivos de anomalias negativas de temperatura mínima e ondas de calor, o mesmo período de anomalias positivas de temperatura máxima. Foi utilizada a técnica dos quantis para dividir, em ordens quartílicas, os maiores valores de anomalias e os valores de intervalo de anomalias de cada onda, a fim de classificá-las quanto a intensidade e a amplitude térmica, respectivamente. Apenas as ondas de 5 dias foram classificadas. Analisando o comportamento médio das ondas, observou-se que as de frio ocorrem mais no inverno e que há uma homogeneidade quanto à sua distribuição no Estado. Já as ondas de calor também ocorrem mais nos meses mais frios, mas sua distribuição é heterogênea, ocorrendo em maior quantidade nas estações meteorológicas localizadas mais ao norte do Estado. Notou-se que há uma correlação positiva entre o número médio de geadas e o número médio de ondas de frio e negativa quanto as ondas de calor, significativas a 1% para os meses de junho e julho, mas não para o mês de agosto. As relações entre ondas de frio e calor e os eventos ENSO mostraram que, em geral, a ocorrência de La Niña faz aumentar o número de ondas de frio e diminuir o número de ondas de calor no Rio Grande do Sul, enquanto a ocorrência de El Niño faz aumentar o número de ondas de calor e diminuir as ondas de frio. Quanto às geadas, também foi analisada sua relação com os eventos ENSO e constatou-se que nos meses de junho e julho, há uma maior ocorrência de geadas nos meses de La Niña, porém, no mês de agosto, essa ocorrência é maior nos meses de El Niñoapplication/pdfporUniversidade Federal de PelotasPrograma de Pós-Graduação em MeteorologiaUFPelBRMeteorologiaOndas de frioOndas de calorEl NiñoLa NiñaCold wavesHeat wavesEl NiñoLa NiñaCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIAClimatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niñainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://lattes.cnpq.br/9408620304462130Assis, Simone Vieira deFirpo, Mári Ândrea Feldmaninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELORIGINALdissertacao_mari_firpo.pdfapplication/pdf1272617http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2185/1/dissertacao_mari_firpo.pdff59407ea3e3a879715dca6636c682cbeMD51open accessTEXTdissertacao_mari_firpo.pdf.txtdissertacao_mari_firpo.pdf.txtExtracted Texttext/plain194852http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2185/2/dissertacao_mari_firpo.pdf.txtf83aebbe5860f996b674b6ac19967dc7MD52open accessTHUMBNAILdissertacao_mari_firpo.pdf.jpgdissertacao_mari_firpo.pdf.jpgGenerated Thumbnailimage/jpeg1425http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/2185/3/dissertacao_mari_firpo.pdf.jpg152d97f5d55449d7b64530d1561c340eMD53open access123456789/21852023-01-19 18:41:48.242open accessoai:guaiaca.ufpel.edu.br:123456789/2185Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2023-01-19T21:41:48Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false |
dc.title.por.fl_str_mv |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
title |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
spellingShingle |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña Firpo, Mári Ândrea Feldman Ondas de frio Ondas de calor El Niño La Niña Cold waves Heat waves El Niño La Niña CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA |
title_short |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
title_full |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
title_fullStr |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
title_full_unstemmed |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
title_sort |
Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña |
author |
Firpo, Mári Ândrea Feldman |
author_facet |
Firpo, Mári Ândrea Feldman |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/9408620304462130 |
dc.contributor.advisor1.fl_str_mv |
Assis, Simone Vieira de |
dc.contributor.author.fl_str_mv |
Firpo, Mári Ândrea Feldman |
contributor_str_mv |
Assis, Simone Vieira de |
dc.subject.por.fl_str_mv |
Ondas de frio Ondas de calor El Niño La Niña |
topic |
Ondas de frio Ondas de calor El Niño La Niña Cold waves Heat waves El Niño La Niña CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA |
dc.subject.eng.fl_str_mv |
Cold waves Heat waves El Niño La Niña |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA |
description |
In this paper the results of Cold and heat waves and their relationships with to El Niño and La Niña events in 13 meteorological stations in Rio Grande do Sul along the years of 1967 up to 2005 are presented. Daily frost and maximum and minimum air temperature data were used. The anomalies were obtained subtracting the average year (climatological normal to the data set) of each year which was analyzed. Cold waves were considered the period of five or more days of consecutive negative minimum temperature and hot waves for the same time but in positive anomalies and maximum temperature. It was also used a quantil technique to split in quartile segments the highest anomalies values and the anomalies interval values of each wave in order to classify them according to its intensity and termic amplitude respectively. Only the waves of five days were classified. Analyzing the waves average behavior it was observed that the cold ones happen more in the winter and that there is an homogeneity related to its distribution in the state. On the other hand, the heat waves happen also in the colder months, but their distribution is heterogeneous, happening more in the meteorological stations located more in the northern part of the state. The relationships between frosts and waves it was noticed that there is a positive correlation between the frosts average number and the cold waves and negatives average number to the heat ones, statistically significant at 1% level in the months of June and July, but not in August. The relationships between cold and heat waves and the ENSO events show that, in general, the occurrence of La Niña increases the number of cold waves and decreases the heat waves in Rio Grande do Sul, while the El Niño increases the heat waves and decreases the cold waves. It was also analyzed the frost relationships with ENSO events and it was noted that in the months of June and July there is a higher occurrence of frosts during La Niñas. However, in August this occurrence is higher during El Niños |
publishDate |
2008 |
dc.date.available.fl_str_mv |
2008-04-09 2014-08-20T14:25:47Z |
dc.date.issued.fl_str_mv |
2008-02-15 |
dc.date.accessioned.fl_str_mv |
2014-08-20T14:25:47Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
FIRPO, Mári Andrea Feldman. Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña . 120 f. Dissertação (Mestrado em Meteorologia) - Universidade Federal de Pelotas, Pelotas, 2008. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufpel.edu.br/handle/ri/2185 |
identifier_str_mv |
FIRPO, Mári Andrea Feldman. Climatologia das ondas de frio e de calor para o Rio Grande do Sul e sua relação com El Niño e La Niña . 120 f. Dissertação (Mestrado em Meteorologia) - Universidade Federal de Pelotas, Pelotas, 2008. |
url |
http://repositorio.ufpel.edu.br/handle/ri/2185 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Universidade Federal de Pelotas |
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Programa de Pós-Graduação em Meteorologia |
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UFPel |
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BR |
dc.publisher.department.fl_str_mv |
Meteorologia |
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Universidade Federal de Pelotas |
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