Masallı Air Quality Index (AQI)

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Masallı, nestled in Azerbaijan’s southeastern corner, occupies a geographically distinctive position within the Lesser Caucasus mountain range. Located at approximately 39.0324° N, 48.6722° E, the town sits at an elevation of around 750 meters (2,460 feet) above sea level, contributing to a cooler climate compared to lower-lying regions. The surrounding landscape is dominated by rugged mountains, dense forests of oak, beech, and hornbeam, and steep valleys carved by rivers flowing towards the Caspian Sea. Masallı’s proximity to the border with Iran influences its cultural landscape and, potentially, transboundary pollution patterns. The urban character is relatively small-scale, a rural town transitioning slowly with limited industrial activity. Agriculture, particularly fruit orchards and livestock farming, forms a significant part of the local economy, and these activities can contribute to localized air quality issues, especially during harvest seasons. The urban–rural gradient is sharp; the town itself is surrounded almost entirely by agricultural land and forested slopes. The terrain’s topography plays a crucial role in air circulation. Valleys can trap pollutants, while the mountains can act as barriers, hindering the dispersion of emissions. The lack of major industrial belts directly adjacent to Masallı mitigates some pollution risks, but agricultural practices and potential transboundary influences remain key factors shaping the local air quality profile. The absence of significant bodies of water nearby limits the moderating effect of large water surfaces on temperature and humidity, further impacting atmospheric conditions.

Masallı’s air quality experiences a distinct seasonal cycle dictated by its climate and topography. Summers (June-August) are typically hot and dry, with frequent periods of stagnant air within the valleys. This can lead to a build-up of pollutants from agricultural activities, such as burning crop residue, and potentially from transboundary sources. The dry conditions also increase the risk of dust storms, further degrading air quality. Autumn (September-November) brings cooler temperatures and increased rainfall, which helps to cleanse the atmosphere, generally improving air quality. However, agricultural burning may still occur during this period. Winters (December-February) are characterized by cold temperatures and occasional fog, particularly in the valleys. Temperature inversions, where cold air becomes trapped beneath a layer of warmer air, are common, preventing vertical mixing and trapping pollutants near the ground. This can significantly worsen air quality during prolonged periods of fog. Spring (March-May) sees a gradual warming and increased wind speeds, which help to disperse pollutants, leading to a noticeable improvement in air quality. The melting snow from the surrounding mountains can also contribute to increased humidity, which can affect the behaviour of particulate matter. Sensitive groups, such as children, the elderly, and individuals with respiratory conditions, should exercise caution during summer evenings and winter mornings, limiting outdoor exertion when air quality is likely to be poorest. Avoiding agricultural areas during burning seasons is also advisable.