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Harran, situated in the Şanlıurfa Province of southeastern Turkey, occupies a geographically significant position within the Mesopotamian plains. Located at coordinates 36.8708° N, 39.0250° E, the city sits at an elevation of approximately 490 meters (1,608 feet) above sea level. This relatively flat terrain, characteristic of the region, facilitates the dispersal of some pollutants, but also allows for stagnation during calm weather conditions. Historically renowned as a centre of learning and agriculture, Harran is surrounded by vast agricultural lands, primarily wheat and cotton fields, contributing to potential dust and pesticide-related air quality concerns. The Euphrates River lies approximately 30-40 kilometers to the north, offering limited influence on local wind patterns but contributing to regional humidity. The urban-rural gradient is relatively sharp, with the city centre transitioning quickly to open farmland. While not a major industrial hub, the increasing agricultural mechanization and regional development projects introduce localised emissions. The prevailing winds are generally from the northwest, carrying potential pollutants from upstream sources. The city’s location within a semi-arid climate further exacerbates dust issues, particularly during drier periods. Understanding this interplay of geography and activity is crucial for assessing Harran’s air quality.

Harran’s air quality follows a distinct seasonal pattern dictated by meteorological conditions and agricultural practices. Spring (March-May) sees a rise in particulate matter due to dust storms originating from the surrounding plains as fields are prepared for planting. Temperatures begin to climb, potentially leading to increased ground-level ozone formation. Summer (June-August) is characterised by intense heat and dry conditions, exacerbating dust resuspension and increasing the risk of wildfires in surrounding areas, contributing to smoke pollution. Calm winds during these months can trap pollutants, leading to poorer air quality. Autumn (September-November) brings a temporary improvement as rainfall washes away accumulated dust and agricultural activity slows. However, temperature inversions become more frequent, trapping pollutants near the ground. Winter (December-February) experiences cooler temperatures and occasional rainfall, generally resulting in the best air quality. However, increased use of solid fuels for heating in residential areas can lead to localised spikes in particulate matter. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during spring and summer months, and ensure adequate ventilation during winter heating seasons. Monitoring wind direction is key, as pollutants can be transported from distant sources.