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Chaoyang, situated in western Liaoning Province in Northeast China, occupies a strategic position at the convergence of the Liaoxi Corridor and the foothills of the Yanshan Mountains. The city lies within the transitional zone between the North China Plain and the Mongolian Plateau, creating a distinctive urban geography characterized by an elevation of approximately 170 meters above sea level. This terrain slopes gently from northwest to southeast, with the Daling River flowing through the urban core, providing limited natural ventilation. Chaoyang's location places it within the broader Northeast China industrial belt, historically centered on coal mining, metallurgy, and cement production, which significantly influences local air quality. The surrounding landscape features semi-arid hills and agricultural valleys, where dust from exposed soils combines with urban emissions. The city's position in a basin-like topography exacerbates pollution accumulation, as surrounding mountains trap airborne particulates, especially during temperature inversions. Proximity to major industrial hubs like Shenyang and Anshan further contributes to regional haze transport. The urban-rural gradient shows concentrated pollution in the central districts, gradually dispersing toward peripheral farmlands, though seasonal agricultural burning adds episodic particulate matter. This geographic setting creates a complex air quality dynamic where local industrial output, topographic confinement, and regional atmospheric circulation collectively determine pollution levels.

Chaoyang's air quality follows a distinct seasonal rhythm shaped by Northeast Asia's monsoon climate and local meteorological patterns. Winter, particularly from December to February, brings the worst pollution due to coal-fired heating, frequent temperature inversions that trap pollutants near the ground, and reduced atmospheric mixing. Cold, stagnant air combined with industrial and residential emissions creates persistent haze, making these months challenging for outdoor activities, especially for sensitive groups like children, the elderly, and those with respiratory conditions. Spring, from March to May, sees gradual improvement as temperatures rise and winds increase, though dust storms from the Gobi Desert and local soil erosion can cause sudden spikes in particulate matter. Summer, from June to August, offers the cleanest air due to monsoon rains that wash pollutants from the atmosphere, stronger ventilation from southeasterly winds, and reduced heating emissions. However, high humidity can occasionally lead to ozone formation on hot days. Autumn, from September to November, begins with relatively good air quality but deteriorates as heating season commences and atmospheric stability increases. Sensitive individuals should monitor daily forecasts, use air purifiers indoors during peak pollution periods, and plan outdoor exercise for summer mornings or after rainfall when pollutant dispersion is optimal.