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Tall Dhahab, nestled within the Ḩimş Governorate of Syria, occupies a geographically significant position within the broader Fertile Crescent. Located at approximately 34.9114° N, 36.4928° E, the city’s terrain is characterized by gently undulating hills and valleys, typical of the semi-arid climate zone. Its elevation, while not exceptionally high, contributes to localized microclimates and influences air circulation patterns. The surrounding landscape is a mosaic of agricultural fields, primarily cultivating olives and grains, interspersed with patches of dry scrubland and rocky outcrops. This agricultural activity, while vital to the regional economy, can contribute to seasonal particulate matter emissions, particularly during harvest periods. Tall Dhahab sits on the edge of a gradual urban-rural gradient; the city itself is relatively small, but it serves as a local market town for the surrounding agricultural communities. The nearest significant body of water is the Orontes River, flowing some distance to the west, which can occasionally influence humidity levels and, under specific meteorological conditions, trap pollutants. While not directly adjacent to major industrial belts, Tall Dhahab’s proximity to larger Syrian cities and potential for localized small-scale industries (e.g., food processing, workshops) means that pollutants can be transported into the area via prevailing winds. The topography, combined with the regional climate, creates conditions where stagnant air masses can form, particularly during periods of calm weather, exacerbating air quality challenges.

Tall Dhahab’s air quality experiences a distinct seasonal cycle dictated by its Mediterranean climate. Spring (March-May) generally sees improved air quality as temperatures rise and winds increase, dispersing accumulated pollutants. However, agricultural burning, a common practice for land clearing and residue disposal, can lead to spikes in particulate matter during this period. Summers (June-August) are typically hot and dry, with frequent periods of calm winds and temperature inversions, especially in the early morning. These inversions trap pollutants close to the ground, potentially leading to reduced visibility and increased respiratory irritation. Dust storms, originating from the Syrian Desert to the east, are also a recurring concern during the summer months. Autumn (September-November) brings a gradual shift towards cooler temperatures and increased rainfall, which helps to cleanse the atmosphere. However, agricultural activities intensify during harvest season, again contributing to particulate pollution. Winter (December-February) is characterized by cooler temperatures and occasional fog, which can trap pollutants and reduce air circulation. The combination of cold air and stagnant conditions can lead to periods of poor air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor exertion during periods of stagnant air, particularly in the early morning and late evening. Increased awareness of agricultural burning practices and their impact on air quality is crucial for minimizing seasonal pollution peaks.