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Noci, nestled in the heart of Puglia, Italy, occupies a geographically significant position within the Murge plateau, a karst landscape characterized by rolling hills and deep sinkholes. Located approximately 37 kilometers southeast of Bari, the city’s coordinates (40.8000, 17.1333) place it at an elevation of around 250 meters above sea level. This elevation, combined with the plateau’s topography, influences local air circulation patterns. The surrounding landscape is predominantly agricultural, with olive groves, vineyards, and cereal fields dominating the rural areas. This agricultural activity, while vital to the regional economy, can contribute to localized air pollution through the release of ammonia and particulate matter from fertilizer use and agricultural burning, though Noci itself is relatively distant from large-scale industrial zones. The urban–rural gradient is gradual, with small villages and scattered farmsteads transitioning seamlessly into the town’s built environment. The Adriatic Sea, while not immediately adjacent, exerts a moderating influence on the climate, bringing occasional sea breezes that can help disperse pollutants. The karst terrain, with its porous limestone bedrock, affects drainage and can influence the persistence of fog, particularly during cooler months, potentially trapping pollutants near the ground. The Murge plateau’s generally open nature, however, typically allows for good ventilation, mitigating the build-up of severe air pollution episodes, although local topography can create microclimates with stagnant air pockets.

Noci’s air quality follows a distinct seasonal pattern dictated by its Mediterranean climate and regional meteorological conditions. Spring (March-May) generally sees improved air quality as temperatures rise and winds increase, dispersing any lingering winter pollutants. However, agricultural activities intensify during this period, potentially leading to localized spikes in ammonia and particulate matter, particularly around fields undergoing fertilization or tillage. Summer (June-August) is typically the cleanest season, with consistent sunshine, strong sea breezes from the Adriatic, and high temperatures promoting atmospheric mixing. This robust ventilation effectively dilutes and removes pollutants. Autumn (September-November) presents a more complex picture. While daytime temperatures remain relatively mild, the nights become cooler, and the increased frequency of temperature inversions – where a layer of warm air traps cooler air near the ground – can lead to pollutant accumulation, especially in the mornings. Agricultural burning, though regulated, can also contribute to autumn air pollution. Winter (December-February) is often the most challenging season. Cold, stable air masses, coupled with frequent fog and reduced wind speeds, create conditions conducive to pollutant trapping. The lack of strong ventilation allows emissions from residential heating (primarily wood-burning stoves) and agricultural sources to linger. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit prolonged outdoor exposure during these periods, particularly on foggy mornings. Maintaining indoor air quality through proper ventilation and air purification can also be beneficial during the colder months.