Climatological Analysis of Precipitation Dynamics in Brazil
Summary
The precipitation regime of Brazil is both highly spatially and temporally heterogeneous, shaped by its continental dimensions, complex topography and interactions between tropical and extratropical circulation systems. In the Amazon and central‐west regions, the annual cycle is dominated by the migration of the Intertropical Convergence Zone, whereas in the southeast and south, seasonal rainfall is modulated by the South Atlantic Convergence Zone, frontal systems and mesoscale convective complexes. Marks of interannual variability are often linked to El Niño–Southern Oscillation events and to sea-surface temperature anomalies in the South Atlantic and Pacific. The country encompasses multiple Köppen–Geiger climate classes, from equatorial and tropical monsoon in the north to subtropical highland and temperate oceanic regimes in the south, producing annual precipitation totals that range from under 1,000 mm in semi-arid zones to over 2,000 mm in coastal mountains. This diversity underpins the hydrological challenges of flood risk, drought management, agricultural planning and ecosystem resilience. Recent advances in remote sensing, high-resolution modelling and regional observational networks have deepened understanding of precipitation extremes, synoptic drivers and feedbacks between land-cover change and atmospheric moisture transport.
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Climatological Analysis of Precipitation Dynamics in Brazil publication trend
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Technical terms
Köppen–Geiger climate classification: A widely used system dividing global climates into categories based on temperature and precipitation patterns.
South Atlantic Convergence Zone (SACZ): A quasi-stationary band of cloudiness and precipitation extending from the Amazon basin southeastward over Brazil, influencing rainy seasons.
Standardized Precipitation Index (SPI): A statistical measure that quantifies precipitation deficits and surpluses over various timescales to characterise drought severity.
El Niño–Southern Oscillation (ENSO): A coupled atmospheric–oceanic phenomenon in the tropical Pacific that modulates interannual climate variability globally, including rainfall in Brazil.
References
- Vegetated roofs rainwater management experimental research in Brazil: A georeferenced exhaustive review of a continental-size country. Cleaner Production Letters (2022).
- Development of an annual drought classification system based on drought severity indexes. Anais da Academia Brasileira de Ciências (2019).
- Standardized Precipitation Index Variability in the Northern Region of Paraná State Associated with the El Niño - Southern Oscillation. Revista Brasileira de Meteorologia (2018).
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