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Kribi, nestled on the Atlantic coast of Cameroon’s Sud region, presents a unique geographic profile significantly influencing its air quality. Situated at approximately 2.9350° latitude and 9.9100° longitude, the city’s location at the mouth of the Kribi River creates a coastal plain characterized by low elevation, rarely exceeding 30 meters above sea level. This flatness, combined with the proximity to the Atlantic Ocean, fosters a humid, maritime climate. The surrounding landscape is a mosaic of mangrove forests, coastal dunes, and fertile agricultural land, primarily dedicated to banana, rubber, and palm oil plantations – key economic drivers for the region. A gradual urban–rural gradient extends inland, transitioning from the bustling port city to smaller villages and agricultural zones. The presence of a significant fishing industry contributes to localized emissions. Further inland, the terrain gently rises, eventually merging with the Cameroon Plateau. The city’s position within a relatively sheltered coastal embayment can exacerbate air pollution episodes, limiting the dispersion of pollutants. Industrial activity, though not extensive, is concentrated around the port, including processing facilities and related logistics, adding to the potential for localized air quality challenges. The prevailing southwesterly trade winds, while generally beneficial for ventilation, can occasionally stall, leading to stagnant air conditions and pollutant accumulation, particularly during certain times of the year.

Kribi’s tropical climate dictates a distinct wet and dry season pattern, profoundly impacting its air quality. The dry season, typically spanning November to April, often sees a slight improvement in air quality due to increased wind speeds and reduced humidity. However, agricultural burning practices, common during land clearing for planting, can generate significant particulate matter, creating localized pollution hotspots. The wet season, from May to October, brings frequent rainfall and high humidity. While rain naturally helps to cleanse the atmosphere, the increased humidity can trap pollutants closer to the ground, particularly during periods of reduced wind. Fog, a relatively common occurrence during the wet season, further restricts atmospheric mixing and can lead to elevated concentrations of certain pollutants. Temperature inversions, though less frequent than in temperate climates, can occasionally occur, trapping cooler, denser air near the surface and preventing the vertical dispersion of pollutants. The months of July and August often experience a combination of high humidity and reduced wind, potentially leading to periods of poorer air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during these periods, limiting strenuous outdoor activity and monitoring for any adverse health effects. Agricultural workers are particularly vulnerable to the effects of smoke from burning practices and should take appropriate protective measures, such as wearing masks.