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Caldas Novas is nestled within the heart of the Goiás plateau, serving as a critical node in the Brazilian Cerrado. Its urban character is defined by a symbiotic relationship between geothermal hydrothermal resources and a sprawling tourism infrastructure. The city sits atop a geological formation that allows hot mineral waters to rise, creating a unique microclimate of humidity around its numerous resorts. Geographically, the terrain is gently undulating, characterized by the vast, open savannas and scrub forests typical of the central highlands. This position within the Cerrado makes the city highly susceptible to regional atmospheric patterns. To the periphery, the urban-rural gradient shifts rapidly into extensive agricultural zones, primarily dedicated to soy and corn production. These surrounding lands are the primary drivers of air quality fluctuations, as the practice of seasonal biomass burning for land clearing releases significant particulate matter into the basin. Because the city lacks a massive industrial belt, its pollution profile is dominated by these agricultural emissions and the localized exhaust from tourist-heavy traffic. The elevation and open landscape generally allow for wind dispersal; however, during periods of atmospheric stability, pollutants can linger. The proximity to the Rio Paranaíba basin provides some moisture, but the dominant influence remains the surrounding vegetation. Consequently, the interplay between the geothermal steam, the dusty savanna soils, and the seasonal smoke plumes creates a complex air quality dynamic unique to this hydrothermal oasis.

The air quality in Caldas Novas follows a binary tropical rhythm, oscillating between the rain-drenched summer and the arid winter. From October to March, the wet season prevails, bringing heavy convective rains that effectively scrub the atmosphere of particulates. During these months, the air is crisp and clean, making it the ideal period for outdoor exploration and respiratory health. However, as the calendar turns toward April and May, the moisture vanishes, ushering in a prolonged dry season that lasts until September. This period is the most critical for air quality, as the Cerrado becomes a tinderbox. Widespread agricultural burning and wildfires lead to a surge in fine particulate matter, often creating a persistent haze over the city. Meteorological conditions during the winter months frequently include temperature inversions, where a layer of warm air traps pollutants close to the ground, preventing vertical dispersion. August and September are typically the most hazardous months, characterized by extremely low humidity and peak smoke concentrations. Sensitive groups, including children and the elderly, should limit strenuous outdoor activities during these peaks to avoid respiratory distress. To mitigate health risks, residents are encouraged to stay hydrated and use air purifiers indoors. The return of the first rains in October provides a dramatic atmospheric reset, washing away the accumulated soot and restoring the crystalline skies of the Goiás interior for another cycle.