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Diangouté Kamara, situated in the Kayes region of Mali, occupies a position within the Sahelian zone, a transitional ecosystem between the Sahara Desert to the north and the Sudanian Savanna to the south. The city’s coordinates (14.5447, -9.5128) place it in a relatively flat terrain, characteristic of the inland Niger River basin. The surrounding landscape is predominantly savanna woodland, interspersed with agricultural lands dedicated to millet, sorghum, and cotton cultivation. The Falémé River, a tributary of the Senegal River, flows nearby, influencing local humidity and potentially contributing to dust suspension during the dry season. While not a major industrial hub, Diangouté Kamara serves as a regional market centre, with associated transport activity. The urban-rural gradient is pronounced; the city core is densely populated, transitioning rapidly to agricultural fields and sparse vegetation. This proximity to agricultural practices introduces potential sources of particulate matter from land preparation and harvesting. The prevailing winds, often originating from the Sahara, carry substantial amounts of dust and sand, significantly impacting air quality. The city’s elevation is relatively low, contributing to limited atmospheric dispersion of pollutants. The combination of these factors creates a unique air quality profile, heavily influenced by regional climate patterns and local land use.

Diangouté Kamara experiences a distinct wet and dry season, profoundly influencing air quality. The dry season, spanning roughly November to May, is characterized by consistently high temperatures and the dominance of Harmattan winds blowing from the Sahara. These winds bring significant quantities of dust, leading to peak particulate matter concentrations. January to March are particularly challenging months for respiratory health. The lack of rainfall during this period prevents the natural cleansing of the atmosphere. Conversely, the wet season, from June to October, offers a respite. The arrival of the monsoon brings rainfall, effectively suppressing dust and washing pollutants from the air. However, increased humidity can also promote the growth of mold and mildew, potentially exacerbating respiratory issues for sensitive individuals. September and October often see a temporary increase in localized pollution due to agricultural burning as farmers prepare fields for the next planting season. Temperature inversions, though less frequent than in temperate climates, can occur during cooler nights in the dry season, trapping pollutants near the ground. Individuals with asthma or other respiratory conditions should limit strenuous outdoor activity during the dry season and monitor their health closely.