PRECIPITATION EXTREMES AND CLIMATE-SENSITIVE DISEASES IN THE BRAZILIAN SEMI-ARID REGION: DATA VALIDATION AND SPATIOTEMPORAL ANALYSIS
Climate Vulnerability; Extreme Rain; Climate dependent diseases
This research was structured into three chapters: two submitted articles and a third that is about to be published. The first study employed remote sensing data, with emphasis on the IMERG V06 (Integrated Multi-Satellite Retrievals for Global Precipitation Measurement) product, to estimate extreme precipitation indices for the period from 2000 to 2020, with validation performed using records from conventional rain gauges. The results indicated good representativeness of the product, particularly for daily events exceeding 10 mm, with the exception of the SDII index, which exhibited lower performance. The spatiotemporal analysis revealed a decreasing trend in the intensity and frequency of extreme precipitation events, especially in the central and western regions of the Brazilian Semi-Arid (SAB), while the southern portion showed an increase in the number of consecutive dry days (CDD). The relationship between changes in climate patterns and regional public health was also investigated, with a focus on morbidity associated with climate-sensitive diseases. Hospital admissions due to circulatory, respiratory, and infectious diseases were analyzed for the period from 1999 to 2021. Despite an overall declining trend in morbidity rates, areas such as northern Bahia, Ceará, and Pernambuco remained critical hotspots, where the intensification of climate extremes worsened sanitary conditions and favored the spread of diseases.The integration of climate and epidemiological data revealed direct impacts on water security and public sanitation in the region, reinforcing the urgency of adaptive public policies that consider regional vulnerabilities in the face of climate change. The use of products such as IMERG V06 proved promising for enhancing climate monitoring in regions with limited in-situ observations. This study contributes to a better understanding of the impacts of changes in hydrometeorological extremes on public health in the BSA, providing relevant support for mitigation and adaptation strategies.