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Korgan, nestled within the Ordu Province of Turkey, occupies a geographically complex position in the Eastern Black Sea region. Situated at coordinates 40.8247°N, 37.3467°E, the city is characterized by a mountainous terrain typical of the Pontic Mountains, which rise steeply from the Black Sea coast. This topography significantly influences local air quality. Korgan’s elevation, averaging around 900 meters above sea level, contributes to temperature inversions, trapping pollutants in the valley during calmer weather. The surrounding landscape is dominated by dense forests and agricultural lands, primarily tea plantations and hazelnut orchards, which, while visually appealing, can contribute to seasonal biomass burning emissions. The city itself is relatively small, with a population of approximately 27,349, exhibiting a distinct urban-rural gradient as it transitions into the surrounding countryside. Korgan isn’t located within a major industrial belt, but smaller-scale local industries and residential heating, particularly wood and coal burning during colder months, are key pollution sources. Its inland location, approximately 20km from the Black Sea, means maritime influences are lessened, and pollutant dispersion relies heavily on regional wind patterns channeled through the mountain valleys. The narrow valleys can act as conduits for pollution, concentrating it in specific areas.

Korgan experiences a temperate Black Sea climate, with distinct seasonal variations impacting air quality. Autumn (September-November) often sees a deterioration in air quality due to increased residential heating with coal and wood as temperatures drop, coupled with agricultural burning of leftover crop residue. Calm, stable atmospheric conditions during this period exacerbate pollution build-up. Winter (December-February) is typically the period of poorest air quality, with consistent heating demands and potential for strong temperature inversions trapping pollutants. Snowfall can temporarily cleanse the air, but also restricts dispersion. Spring (March-May) brings gradual improvement as temperatures rise and heating needs decrease, though pollen counts become a concern for allergy sufferers. Rainfall during spring helps to wash pollutants from the atmosphere. Summer (June-August) generally offers the best air quality, with warm temperatures, prevailing winds aiding dispersion, and minimal heating. However, occasional wildfires in the surrounding forests can lead to localized smoke events. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during autumn and winter months. Monitoring local conditions and avoiding peak heating hours is advisable.