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Sokhumi, the capital of Abkhazia, is a Black Sea coastal city nestled between the Greater Caucasus Mountains and the sea. Located at coordinates 43.0000, 41.0167, its geography profoundly influences its air quality. The city sprawls along a narrow coastal plain, with a rapid elevation increase inland, creating a complex interplay of air currents. The Psou River forms part of the border with Russia to the northeast, while the Enguri River lies to the south, both contributing freshwater influx and potential humidity. Historically, Sokhumi benefited from a subtropical climate and lush vegetation, but post-conflict development and limited environmental regulation have altered this balance. The surrounding landscape is a mix of deciduous forests, citrus groves, and agricultural land, particularly to the east. Industrial activity, though not concentrated in massive belts, is present in and around the city, contributing to localised pollution. The urban-rural gradient is steep; moving inland quickly transitions from dense urban areas to mountainous terrain. This topography can trap pollutants during calm weather, exacerbating air quality issues, particularly during temperature inversions common in the autumn and winter months. The Black Sea provides some degree of ventilation, but prevailing winds can also carry pollutants from regional sources.

Sokhumi’s air quality follows a distinct seasonal pattern. Spring (March-May) sees improving conditions as rainfall increases, washing away accumulated winter pollutants, and vegetation begins to absorb airborne particles. However, pollen counts can be high, impacting those with allergies. Summer (June-August) generally offers the cleanest air, driven by consistent sea breezes and higher temperatures promoting dispersion. However, increased tourism and associated vehicle traffic can lead to localised spikes in nitrogen dioxide. Autumn (September-November) is a transition period, marked by decreasing temperatures and increasing frequency of temperature inversions, trapping pollutants near the ground. This often leads to a deterioration in air quality, with higher concentrations of particulate matter. Winter (December-February) is typically the worst period, characterised by calm conditions, limited rainfall, and increased use of solid fuels for heating. Fog is common, further reducing visibility and trapping pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during autumn and winter. Monitoring wind direction is crucial; winds from the east can bring pollutants from agricultural burning, while those from the north may carry industrial emissions. Avoiding peak traffic hours is also advisable.