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Yuzhne, a port city nestled on the Black Sea coast within Odeska Oblast, Ukraine, occupies a geographically significant position. Located at approximately 46.63°N, 31.10°E, its urban fabric is intrinsically linked to the surrounding landscape. The city’s terrain is relatively flat, typical of the coastal plains of southern Ukraine, facilitating its development as a major maritime hub. Elevation is minimal, rarely exceeding 30 meters above sea level, which can exacerbate air quality issues by limiting vertical dispersion of pollutants. Yuzhne’s proximity to the Black Sea influences local weather patterns, often bringing moisture and impacting wind direction. The city’s primary function is as a petrochemical processing centre, with significant industrial activity concentrated along the coastline, including ammonia and urea production facilities. This industrial belt is a key contributor to local air pollution. Beyond the immediate urban area, the landscape transitions into agricultural lands – predominantly grain fields and orchards – forming a gradual urban-rural gradient. The Dniester Liman, a shallow lagoon to the southwest, further shapes the local microclimate and can trap pollutants under certain meteorological conditions. The lack of significant topographic barriers, combined with the concentrated industrial activity and agricultural practices, creates a setting where air quality is particularly vulnerable to fluctuations and requires careful monitoring. The Black Sea itself, while providing a cooling effect in summer, can also contribute to humidity and fog, impacting pollutant dispersal.

Yuzhne’s air quality experiences a distinct seasonal cycle heavily influenced by meteorological conditions. Winter months (December-February) often present the most challenging period. Cold temperatures frequently lead to temperature inversions, where a layer of warm air traps cooler air near the ground, preventing the vertical dispersion of pollutants emitted from industrial sources and vehicle traffic. Fog, common during these months, further exacerbates the problem by limiting visibility and trapping particulate matter. Spring (March-May) brings a gradual improvement as temperatures rise and wind speeds increase, aiding in pollutant dispersal. However, agricultural activities, including fertilizer application, can introduce ammonia and other agricultural pollutants into the air. Summer (June-August) generally offers the best air quality, with consistent winds and higher temperatures promoting efficient ventilation. However, periods of intense heat can lead to stagnant air conditions and ozone formation. Autumn (September-November) sees a return to more variable conditions. As temperatures cool, the risk of temperature inversions increases, and agricultural burning, a traditional practice in the region, can contribute to elevated particulate matter levels. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during winter and autumn, limiting outdoor activity on days with poor visibility or reported elevated pollutant levels. During the warmer months, while generally better, prolonged exposure during heatwaves should still be approached with care, ensuring adequate hydration and avoiding strenuous activity during peak ozone hours.