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Garbahaarrey, situated in the Gedo region of southern Somalia, occupies a strategically important position within a semi-arid landscape. Located at approximately 3.35°N, 42.26°E, the city’s geography is defined by its gently undulating terrain, transitioning from the broader Somali Plateau. The elevation averages around 1,200 meters (3,937 feet) above sea level, contributing to a relatively cool climate compared to coastal regions. The surrounding landscape is predominantly characterized by open grasslands, scrubland, and scattered acacia trees, typical of the rangeland ecosystem. While Garbahaarrey lacks immediate proximity to major rivers or lakes, it draws water from seasonal wadis and relies on groundwater resources, impacting local land use and potential dust sources. The urban footprint is relatively compact, reflecting the city’s size and historical development as a trading hub along traditional caravan routes. There's a gradual urban-rural gradient extending outwards, with agricultural activity – primarily pastoralism and small-scale rain-fed farming – becoming more prevalent. The absence of significant industrial belts within or immediately adjacent to Garbahaarrey limits industrial pollution, however, vehicle emissions and the burning of biomass for cooking and heating are the primary contributors to localized air quality concerns. The prevailing winds, often originating from the highlands to the west, can transport dust and particulate matter across the region, influencing air quality fluctuations. The soil composition, largely sandy loam, is prone to wind erosion, particularly during drier periods, exacerbating dust pollution.

Garbahaarrey experiences a bimodal rainfall pattern, defining its wet and dry seasons and significantly influencing air quality. The longer dry season, typically spanning from May to October, is characterized by intense solar radiation, high temperatures, and minimal rainfall. This period often sees a marked increase in particulate matter concentrations due to wind-driven dust storms originating from the surrounding rangelands and agricultural fields. The lack of vegetation cover during this time further contributes to soil erosion and dust suspension. Temperature inversions, though less frequent than in colder climates, can occasionally trap pollutants near the ground, particularly during calmer nights. The shorter wet season, from November to April, brings relief from dust, as rainfall settles particulate matter and promotes vegetation growth. However, the wet season can also introduce localized humidity and fog, which, while reducing visibility, can temporarily trap pollutants. Months like June, July, and August are generally the most challenging for air quality, with frequent dust events. Conversely, February and March often offer the best conditions. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor exertion during peak dust events and periods of reduced visibility. Maintaining indoor air quality through proper ventilation and filtration is also advisable. The burning of wood and charcoal for cooking, a common practice, contributes to localized smoke pollution, particularly during the cooler evenings of the wet season. Public health messaging should emphasize responsible fuel usage and alternative cooking methods where feasible.