Diankabou Air Quality Index (AQI)

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Diankabou, nestled within the Mopti Region of Mali, occupies a geographically significant position at approximately 14.5844° latitude and -3.0814° longitude. The town’s setting is characterized by a gently undulating Sahelian landscape, transitioning from sparse grasslands to scrublands, typical of this semi-arid zone. Elevation is relatively low, averaging around 200 meters above sea level, contributing to a stable atmospheric layer that can, at times, trap pollutants. Diankabou’s proximity to the Niger River, though not directly on its banks, influences local humidity and temperature patterns, impacting atmospheric stability. The surrounding landscape is dominated by agricultural fields, primarily cultivating millet, sorghum, and maize, interspersed with acacia woodlands. This agricultural activity, particularly during harvesting and burning seasons, represents a significant localized source of particulate matter. The urban–rural gradient around Diankabou is gradual; the town blends seamlessly into the agricultural zone, with small villages and dispersed homesteads characterizing the immediate periphery. There are no major industrial belts nearby; however, the town serves as a regional market hub, with vehicular traffic and associated emissions contributing to localized air pollution. The terrain’s flatness limits natural ventilation, potentially exacerbating the impact of emissions, especially during periods of low wind speed. The regional climate, hot and dry for much of the year, further influences the dispersion of pollutants, often leading to stagnant air conditions.

Diankabou’s air quality follows a distinct seasonal pattern dictated by the region’s tropical savanna climate. The dry season, spanning roughly from November to May, presents the most challenging conditions. Characterized by intense heat and minimal rainfall, this period often experiences temperature inversions, where a layer of warm air traps cooler air near the ground, preventing the vertical dispersion of pollutants. Agricultural burning, a common practice for land clearing and residue disposal, significantly elevates particulate matter concentrations during this time, particularly in February and March. The Harmattan wind, a dry and dusty trade wind blowing from the Sahara, can also transport fine particulate matter into the region, further degrading air quality. The wet season, from June to October, brings relief with increased rainfall, which naturally washes pollutants from the atmosphere. However, the onset of the monsoon can also bring dust storms, temporarily impacting air quality. Fog, though infrequent, can occur during cooler nights in the early wet season, trapping pollutants near the ground. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak burning periods. During the Harmattan season, wearing masks can offer some protection. The transition months of May and November present a moderate risk, with fluctuating wind patterns and variable agricultural activity. Overall, minimizing exposure to smoke from burning and seeking shelter during dust storms are crucial for maintaining respiratory health throughout the year.