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Diyarbakır, situated in southeastern Turkey's Upper Mesopotamia region, occupies a strategic position on the northern edge of the vast Tigris River basin. The city's urban character is defined by its historic black basalt walls encircling the old town, with modern expansion sprawling across the surrounding plains. At an elevation of approximately 675 meters above sea level, Diyarbakır rests on a relatively flat plateau bordered by the rugged Taurus Mountains to the north and the Syrian Desert to the south. This terrain creates a distinct urban-rural gradient where agricultural zones—primarily wheat fields and pistachio orchards—gradually give way to the dense urban core. The Tigris River flows just south of the city, providing some moisture but insufficient to significantly mitigate the region's arid climate. Diyarbakır's location in an agricultural heartland means seasonal burning of crop residues contributes to particulate pollution, while its position along major transportation routes between Turkey, Syria, and Iraq brings heavy diesel traffic. The city's geography specifically affects air quality through temperature inversions that trap pollutants in the basin-like terrain, limited natural ventilation due to surrounding topography, and dust transport from the desert regions to the south during dry periods. Urban expansion has encroached on agricultural lands, creating a mixed pollution profile with both urban emissions and agricultural influences.

Diyarbakır experiences distinct seasonal air quality patterns shaped by its continental climate and regional geography. Winter months (December-February) typically see the poorest air quality due to temperature inversions that trap pollutants close to the ground, combined with increased residential heating emissions from coal and wood burning. Sensitive groups should limit prolonged outdoor exposure during these cold, stagnant periods. Spring (March-May) brings gradual improvement as temperatures rise and winds increase, though March and April can experience dust storms carried from desert regions to the south, temporarily elevating particulate levels. Summer (June-August) offers the cleanest air overall with strong daytime convection dispersing pollutants, though occasional heat waves can lead to ozone formation from vehicle emissions reacting with intense sunlight. Early mornings in summer provide optimal conditions for outdoor activity. Autumn (September-November) sees a transition as temperatures cool and atmospheric stability increases, with October and November experiencing deteriorating conditions as heating season begins and agricultural burning occurs after harvest. The lack of significant precipitation throughout much of the year means pollutants accumulate rather than being washed away, making wind patterns the primary cleansing mechanism. Those with respiratory conditions should be particularly cautious during winter inversions and spring dust events, scheduling outdoor activities for midday when mixing is strongest.