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Universidade Federal de Alagoas (2022)

Dinâmica dos focos de calor nas mesorregiões climáticas do estado de Alagoas

Sousa Filho, Valter Ramos de

Titre : Dinâmica dos focos de calor nas mesorregiões climáticas do estado de Alagoas

Dynamic of fire focis in the climatic mesoregions of Alagoas

Auteur : Sousa Filho, Valter Ramos de

Université de soutenance : Universidade Federal de Alagoas

Grade : Mestrado em Meteorologia 2022

Résumé
This study evaluated the spatiotemporal variability of fire focis (FF) in the three climatic mesoregions of Alagoas : Arid Zone, East and Hinterland Alagoano. FF data were obtained from the Queimadas Database (BDQueimadas) between 1998-2020. The FF time series was submitted to descriptive, exploratory, and multivariate statistical analysis applied to 102 municipalities in Alagoas. Based on the hierarchical grouping, three homogeneous groups were identified (G1, G2 and G3) in the Arid Zone and two homogeneous groups of FF in the Hinterland and East Alagoas (G1 and G2). Some municipalities did not form groups (NA), such as : Belo Monte (26.83 ± 25.87 foci), Limoeiro de Anadia (54.48 ± 38.65), Penedo (262.83 ± 183.80 foci) and Coruripe (553 ± 369.40 foci). The interannual FF variability in Alagoas is associated with agricultural activities, deforestation, new areas for animal husbandry and sugarcane harvest. In the spatial evaluation via FF density per municipality, the total period (1998-2020) and the years highlighted in the time series (2012 and 2019) were used. The highest FF density record in the total period is found in the East Alagoas mesoregion and it is not ruled out that the highlighted years are influenced by the occurrence of drought and dry periods in Alagoas. The Atlantic Forest biome is more threatened according to the number of records of annual hotspots, however, in some years there is an increase in the Caatinga biome.

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Page publiée le 25 janvier 2023