Mapping of aridity and its connections with climate classes and climate desertification in future scenarios – Brazilian semi-arid region
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Keywords

Spatial Modeling
Semi-arid zone
Droughts
Climate change

How to Cite

SILVA, L. A. P. da; SILVA, C. R. da; SOUZA, C. M. P. de; BOLFE, Édson L.; SOUZA, J. P. S.; LEITE, M. E. Mapping of aridity and its connections with climate classes and climate desertification in future scenarios – Brazilian semi-arid region. Sociedade & Natureza, [S. l.], v. 35, n. 1, 2023. DOI: 10.14393/SN-v35-2023-67666. Disponível em: https://seer.ufu.br/index.php/sociedadenatureza/article/view/67666. Acesso em: 25 jun. 2024.

Abstract

Brazil has the most populous and biodiverse semi-arid region in the world (Brazilian Semi-arid - SAB). However, in recent decades, clusters of desertification have emerged, a problem that could intensify from climate change. The objective of this study was to elaborate on the spatial distribution of areas susceptible to climatic desertification in the SAB, considering future climate change scenarios. Understanding this dynamic is essential for SAB's agri-environmental management. Aridity indices and proposition of climate classes for current condition (1970-2000) and future scenarios (2061-2080) of the Intergovernmental Panel on Climate Change (IPCC) were prepared, considering scenarios from Shared Socioeconomic Pathways: Optimistic (SSP 126) and pessimists (SSP 585). The results indicate that by the end of the century, the climate in the SAB should become significantly drier (Kruskal-Wallis = p-value < 0.05), with an intensification of the aridity index in SSP 585. In the scenarios, the expansion of more arid areas over humid climates could reach 56,500 km² (10%) in SSP 126 and 140,400 km² (24%) in SSP 585. Consequently, areas with high (622,400 km² to 706,300 km²) and very high (622,400 km² to 706,300 km²) are expected to expand. 4,400 to 21,700 km²) susceptibility to climate desertification in the SAB, respectively in scenarios SSPs 126 and 585. Confirming these projections would imply socioeconomic and ecological risks in the SAB.

https://doi.org/10.14393/SN-v35-2023-67666
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Copyright (c) 2022 Lucas Augusto Pereira da Silva, Claudionor Ribeiro da Silva, Cristiano Marcelo Pereira de Souza, Édson Luís Bolfe, João Paulo Sena Souza, Marcos Esdras Leite

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