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Boké, situated in the Boké Prefecture of Guinea, West Africa, occupies a geographically significant position within the nation’s northwestern region. Its coordinates, 10.94°N, -14.3°W, place it near the border with Guinea-Bissau, within a landscape dominated by the Fouta Djallon highlands. The city itself is nestled at an elevation of approximately 350 meters (1,150 feet) above sea level, contributing to a generally cooler climate compared to Guinea’s coastal areas. Boké’s terrain is characterized by rolling hills, fertile valleys, and dense vegetation, a legacy of the region’s rich guinean rainforest ecosystem. The city lies close to the Río Grande de Conakry, a vital waterway that influences local humidity and microclimates. Surrounding Boké is a mosaic of agricultural land, primarily dedicated to rice cultivation and the production of bananas, mangoes, and coffee – key components of Guinea’s economy. Further afield, the landscape transitions into more rugged, forested areas. The urban–rural gradient around Boké is relatively sharp, with agricultural activities dominating the immediate periphery. Industrial activity, primarily related to bauxite mining and processing, is concentrated in specific zones around the city, creating localized pollution hotspots. The prevailing winds, often influenced by the highlands, can trap pollutants, particularly during periods of reduced air movement. The proximity to both agricultural zones and mining operations creates a complex interplay of factors impacting air quality, with seasonal variations in agricultural burning and industrial emissions playing a crucial role.

Boké’s tropical climate dictates a distinct wet and dry season pattern, profoundly influencing its air quality. The dry season, typically spanning from November to May, is often characterized by lower humidity and increased sunshine, but also by a greater propensity for stagnant air. During this period, dust from nearby agricultural fields, exacerbated by wind erosion, can become a significant contributor to particulate matter. The lack of rainfall means there’s less natural cleansing of the atmosphere. Temperature inversions, where cooler air is trapped beneath a layer of warmer air, are more frequent during the dry season, further hindering pollutant dispersion and leading to localized build-ups, particularly around industrial areas. The wet season, from June to October, brings frequent rainfall and higher humidity, generally improving air quality by washing away particulate matter and diluting gaseous pollutants. However, intense rainfall events can occasionally lead to flooding, which can stir up dust and release pollutants from inundated areas. Agricultural burning, a common practice for land clearing and crop residue disposal, peaks towards the end of the dry season and early in the wet season, significantly impacting air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of dust storms or stagnant air. Outdoor activities are generally more favorable during the wet season, although heavy rainfall can still pose challenges. The interplay of wind patterns, temperature fluctuations, and agricultural practices creates a dynamic air quality profile throughout the year.