The role of wind direction on the occurrence of large fire events in Portugal

Detalhes bibliográficos
Autor(a) principal: Santos, Luana Sofia Cardoso dos
Data de Publicação: 2023
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/59037
Resumo: Tese de mestrado, Ciências Geofísicas (Meteorologia e Oceanografia), 2023, Universidade de Lisboa, Faculdade de Ciências
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spelling The role of wind direction on the occurrence of large fire events in PortugalGrandes fogosDireção do ventoPerigo de incêndioPotência radiativa de fogoERA5Teses de mestrado - 2023Departamento de Engenharia Geográfica, Geofísica e EnergiaTese de mestrado, Ciências Geofísicas (Meteorologia e Oceanografia), 2023, Universidade de Lisboa, Faculdade de CiênciasLarge wildfires have been landmark events in continental Portugal during the last decades, producing catastrophic damages and shaping the socio-economics of the country. In this work, the role of the wind field in wildfires in the last two decades is analyzed to assess the role in triggering or exacerbating these events. Furthermore, this thesis reinforces the need to incorporate information about wind direction in meteorological fire danger indexes. Two intra-annual peaks of fire activity were found, a mostly human-inflicted smaller peak in March and a major one in the summer period. No significant relation was found between the number of ignitions and burned area, akin to previous studies. Spatially, it was found that ignitions are more frequent in highly populated areas, whereas the larger burned areas are found in the inland, with dense forestation and less population. This discrepancy translates into the fact that only 0.06% of ignitions accounted for nearly 50% of all burned area. The meteorological fire danger, through the Fire Danger Index (FWI), was analyzed per ignition observation, with ignitions which individually originated burned areas above 1000 ha being markedly associated to the conditions of higher fire danger. Analysis of the wind field in continental Portugal during the warmest period of the year presented a strong northwesterly component while days with more than 1000 ha of burned area, had a prevalence of easterly winds in the ignition points. Principal component analysis was used to identify long shape wildfires, which were furthermore associated with the most intense winds. Considering the wildfires which had their prevalent direction and wind field direction closely aligned (forming an angle less than 45º), they represent 24.2% of all burned area for the 2001-2020 period, although corresponding to only 0.03% of all ignitions. These mostly occur where topography is more complex, in inland Portugal.Câmara, Carlos Portugal da, 1957-Repositório da Universidade de LisboaSantos, Luana Sofia Cardoso dos2023-08-28T12:23:37Z202320232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/59037enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-08T17:08:00Zoai:repositorio.ul.pt:10451/59037Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:09:03.945096Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv The role of wind direction on the occurrence of large fire events in Portugal
title The role of wind direction on the occurrence of large fire events in Portugal
spellingShingle The role of wind direction on the occurrence of large fire events in Portugal
Santos, Luana Sofia Cardoso dos
Grandes fogos
Direção do vento
Perigo de incêndio
Potência radiativa de fogo
ERA5
Teses de mestrado - 2023
Departamento de Engenharia Geográfica, Geofísica e Energia
title_short The role of wind direction on the occurrence of large fire events in Portugal
title_full The role of wind direction on the occurrence of large fire events in Portugal
title_fullStr The role of wind direction on the occurrence of large fire events in Portugal
title_full_unstemmed The role of wind direction on the occurrence of large fire events in Portugal
title_sort The role of wind direction on the occurrence of large fire events in Portugal
author Santos, Luana Sofia Cardoso dos
author_facet Santos, Luana Sofia Cardoso dos
author_role author
dc.contributor.none.fl_str_mv Câmara, Carlos Portugal da, 1957-
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Santos, Luana Sofia Cardoso dos
dc.subject.por.fl_str_mv Grandes fogos
Direção do vento
Perigo de incêndio
Potência radiativa de fogo
ERA5
Teses de mestrado - 2023
Departamento de Engenharia Geográfica, Geofísica e Energia
topic Grandes fogos
Direção do vento
Perigo de incêndio
Potência radiativa de fogo
ERA5
Teses de mestrado - 2023
Departamento de Engenharia Geográfica, Geofísica e Energia
description Tese de mestrado, Ciências Geofísicas (Meteorologia e Oceanografia), 2023, Universidade de Lisboa, Faculdade de Ciências
publishDate 2023
dc.date.none.fl_str_mv 2023-08-28T12:23:37Z
2023
2023
2023-01-01T00:00:00Z
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.uri.fl_str_mv http://hdl.handle.net/10451/59037
url http://hdl.handle.net/10451/59037
dc.language.iso.fl_str_mv eng
language eng
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.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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