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Horasan, nestled in the eastern Anatolian region of Turkey within Erzurum Province, occupies a geographically significant position. Located at coordinates 40.0397°N, 42.1711°E, the city sits at a considerable elevation, averaging around 1,640 meters (5,380 feet) above sea level. This high-altitude setting profoundly influences its climate and, consequently, its air quality. The surrounding landscape is characterised by rolling hills and plateaus, typical of the Eastern Anatolian plateau, transitioning into more rugged mountainous terrain further afield. Horasan isn’t directly adjacent to large bodies of water, though smaller streams and rivers dissect the region, fed by snowmelt from the higher elevations. The urban-rural gradient is quite sharp; Horasan itself is a relatively small city, quickly giving way to agricultural lands dominated by dry farming and livestock grazing. While not a major industrial hub, regional agricultural practices, including the burning of agricultural waste, contribute to localised pollution. The city’s position within a valley can also exacerbate pollution events, trapping emissions during periods of atmospheric stability. The prevailing winds, often channeling through the valleys, play a crucial role in dispersing or concentrating pollutants. Understanding this interplay between topography, land use, and meteorology is vital for assessing and mitigating air quality challenges in Horasan.

Horasan experiences a harsh continental climate, resulting in distinct seasonal air quality patterns. Winters (December-February) are typically characterised by stable atmospheric conditions and frequent temperature inversions, trapping pollutants from residential heating – primarily coal and wood – near the ground. Snowfall is common, which can temporarily cleanse the air, but also restricts dispersion. Spring (March-May) sees a gradual improvement as temperatures rise and winds become more frequent, though dust storms originating from the surrounding arid lands can elevate particulate matter. Summer (June-August) generally offers the cleanest air, with strong winds and convective activity effectively dispersing pollutants. However, prolonged dry spells can lead to increased dust. Autumn (September-November) is a transitional period, with decreasing temperatures and increasing reliance on heating, leading to a gradual deterioration in air quality. October and November often see a build-up of pollutants before the onset of winter. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during winter months and periods of dust storms. Monitoring wind direction is crucial; winds from agricultural areas may carry smoke and particulate matter. Avoiding outdoor exercise near roadways during peak traffic hours is also advisable.