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O estudo documental da tempestuosidade em São Miguel (Açores) entre 1999 e 2019
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Abstract(s)
Localizada no Atlântico Norte, a ilha de São Miguel é a maior e a mais populosa do arquipélago dos Açores sendo também aquela que maior pressão antrópica tem sofrido. Consequentemente, num ambiente de alterações climáticas e sendo as Ilhas Pequenas sistemas muito sensíveis, importa perceber como a tempestuosidade tem afetado a população e como tem evoluído nas últimas décadas em termos de frequência, durabilidade e intensidade.
O presente trabalho incidiu sobre a pesquisa em registo documental histórico (jornal Açoriano Oriental de 1999 a 2019) para estruturar séries temporais de parâmetros meteorológicos para a ilha de São Miguel. Nesta tarefa foi utilizada a metodologia desenvolvida por Borges (2003) para o estudo da tempestuosidade nos Açores entre 1835 e 1998. Deste modo foi possível elaborar séries de tempestuosidade para São Miguel entre 1999 e 2019 e por forma a obter uma base de dados de espectro largo, a recolha de dados realizada para o arquipélago dos Açores permitiu igualmente construir uma série para o Arquipélago para o mesmo período. Deste modo, para além de se caracterizar a tempestuosidade em São Miguel no referido período de anos foi possível fazer o mesmo para os Açores. Estabeleceu-se igualmente a comparação entre a tempestuosidade específica de São Miguel com a dos Açores em geral. Adicionalmente, a caracterização da tempestuosidade nos Açores entre 1999 e 2019 permitiu relacioná-la com tempestuosidade nos Açores para o período entre 1835 e 1998.
Especificamente em São Miguel registaram-se 200 tempestades e 437 dias tempestuosos enquanto nos Açores ocorreram 571 tempestades e 555 dias de temporal entre 1999 e 2019. Concluiu-se que a tempestuosidade em São Miguel e nos Açores apresenta uma variação interanual e ao longo do tempo, assim como geograficamente diferindo de ilha para ilha, tendo por exemplo sido identificadas 71 tempestades e 118 dias tempestuosos para os Açores em geral que não foram registados em São Miguel. No período estudado houve uma evolução na tempestuosidade tendo aumentado a frequência dos eventos extremos.
Torna-se, pois, de extrema importância uma boa gestão territorial por forma a mitigar os impactos das tempestades nas ilhas dos Açores.
ABSTRACT: Located in the North Atlantic, the island of São Miguel is the largest and most populated in the Azores archipelago and is also the one that has suffered the greatest anthropogenic pressure. Consequently, in an environment of climate change and being the Small Islands very sensitive systems, it is important to understand how the storminess have affected the population and how it has evolved in the last decades in terms of frequency, durability and intensity. The present work focused on the research in historical documentary record (Açoriano Oriental newspaper from 1999 to 2019) to structure time series of meteorological parameters for the island of São Miguel. In this task, the methodology developed by Borges (2003) for the study of the storminess in the Azores between 1835 and 1998 was used. Series of storminess were produced for São Miguel between 1999 and 2019 and in order to obtain a database of broad spectrum, the data collection carried out for the Azores archipelago also allowed the construction of a series for the archipelago for the same period. In addition to characterizing the storminess in São Miguel in the that period, it was possible to do the same for the Azores. A comparison was also established between the specific storminess of São Miguel Island and that of the Azores in general. Additionally, the characterization of storminess in the Azores between 1999 and 2019 allowed to correlated it with the storminess in the Azores for the period between 1835 and 1998. Specifically in São Miguel there were 200 storms and 437 stormy days while in the Azores there were 271 storms and 555 storm days between 1999 and 2019. Storminess in São Miguel and the Azores presents an inter-annual variability and also vary over time, as well as differing geographically from island to island. For example, 71 storms and 118 stormy days were identified for the Azores in general that were not recorded in São Miguel. During the studied period, there was an evolution in the storminess with an increase in the frequency of extreme events. It is therefore extremely important to have good territorial management in order to mitigate the impacts of the storminess on the islands of the Azores.
ABSTRACT: Located in the North Atlantic, the island of São Miguel is the largest and most populated in the Azores archipelago and is also the one that has suffered the greatest anthropogenic pressure. Consequently, in an environment of climate change and being the Small Islands very sensitive systems, it is important to understand how the storminess have affected the population and how it has evolved in the last decades in terms of frequency, durability and intensity. The present work focused on the research in historical documentary record (Açoriano Oriental newspaper from 1999 to 2019) to structure time series of meteorological parameters for the island of São Miguel. In this task, the methodology developed by Borges (2003) for the study of the storminess in the Azores between 1835 and 1998 was used. Series of storminess were produced for São Miguel between 1999 and 2019 and in order to obtain a database of broad spectrum, the data collection carried out for the Azores archipelago also allowed the construction of a series for the archipelago for the same period. In addition to characterizing the storminess in São Miguel in the that period, it was possible to do the same for the Azores. A comparison was also established between the specific storminess of São Miguel Island and that of the Azores in general. Additionally, the characterization of storminess in the Azores between 1999 and 2019 allowed to correlated it with the storminess in the Azores for the period between 1835 and 1998. Specifically in São Miguel there were 200 storms and 437 stormy days while in the Azores there were 271 storms and 555 storm days between 1999 and 2019. Storminess in São Miguel and the Azores presents an inter-annual variability and also vary over time, as well as differing geographically from island to island. For example, 71 storms and 118 stormy days were identified for the Azores in general that were not recorded in São Miguel. During the studied period, there was an evolution in the storminess with an increase in the frequency of extreme events. It is therefore extremely important to have good territorial management in order to mitigate the impacts of the storminess on the islands of the Azores.
Description
Dissertação de Mestrado, Ambiente, Saúde e Segurança, 26 de novembro de 2021, Universidade dos Açores.
Keywords
Eventos Extremos Meteorologia Ilha de São Miguel Açores Extreme Events Storms Azores
Citation
Sousa, Rodrigo Amaral (2021). "O estudo documental da tempestuosidade em São Miguel (Açores) entre 1999 e 2019", 80 p.. Mestrado em Ambiente, Saúde e Segurança. Ponta Delgada: Universidade dos Açores. [Consult. Dia Mês Ano]. Disponível em www:<http://hdl.handle.net/10400.3/6340>