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Gangneung, nestled in the eastern coastal region of Gangwon Province, South Korea, presents a unique geographic setting influencing its air quality. Situated at coordinates 37.7500, 128.9000, the city sprawls across a coastal plain backed by the Taebaek Mountains. This terrain creates a complex interplay of maritime and continental influences. The East Sea (Sea of Japan) directly impacts the city’s climate, bringing moisture and moderating temperatures, but also contributing to potential sea-salt aerosol pollution. Gangneung’s elevation varies, rising from sea level to foothills, affecting local wind patterns and pollutant dispersion. While historically reliant on fishing and agriculture, Gangneung has seen increasing urbanization and some light industrial development, primarily focused on food processing and tourism support. The surrounding landscape is a mix of agricultural land – particularly rice paddies and orchards – coniferous forests on the mountain slopes, and increasingly, residential and commercial areas. The urban-rural gradient is relatively sharp, with denser development concentrated along the coastline and a more rural character inland. This proximity to both natural environments and human activity creates a dynamic air quality situation, susceptible to both regional and local pollution sources. The city’s position also means it can be affected by transboundary pollution from mainland Asia.

Gangneung’s air quality follows a distinct seasonal pattern. Spring (March-May) often sees increased particulate matter from yellow dust storms originating in the Gobi Desert, carried by prevailing westerly winds. These events can significantly degrade air quality, impacting respiratory health. Summer (June-August) benefits from monsoon winds that generally cleanse the atmosphere, offering the best air quality of the year, though localised humidity can contribute to secondary pollutant formation. However, increased tourism during peak season also brings higher vehicle emissions. Autumn (September-November) is typically pleasant with clear skies, but stagnant air masses can trap pollutants, particularly from agricultural burning practices in surrounding areas. Temperature inversions become more frequent, exacerbating pollution. Winter (December-February) presents the most challenging conditions. Cold, dry air and weak winds lead to pollutant accumulation, especially from heating sources. The city’s coastal location can also lead to fog formation, trapping pollutants near the ground. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during yellow dust events in spring and periods of stagnant air in autumn and winter. Monitoring air quality forecasts is crucial for informed decision-making.