Chennai has been experiencing poor air quality for the past few days which has resulted in smoggy days. The reason for this condition can be attributed to the formation of systems in Bay of Bengal, including Cyclone Bulbul and Low Pressure Area, which has restricted the northeasterly wind flow over Chennai, Coastal Tamil Nadu. Telangana, Andhra Pradesh, etc.
Thus, the air quality has deteriorated over all the places. Moreover, the dense smog which was persisting over Delhi and NCR, and plains of North India was pushed to the east by strong westerly winds, gradually travelling to East India. It was further pushed to Southern Peninsula via Odisha, Andhra Pradesh.
Thus, due to this, Pollution levels have increased over Chennai and adjoining areas. Although, it did thin down until the time it reached Chennai because of long travel.
However, since then, weather conditions and wind profile were light and variable over South India because of the formation of Cyclone Bulbul. Moreover, the humidity levels have increased as in lower levels, northeasterly cool winds were travelling, which were overlaid by humid easterly winds. This merger of winds has resulted in the formation of mist and haze on the ground level.
Mist and haze mingled with pollutants, resulting in formation of smog, which caused reduced visibility and deteriorated air quality. Now, as the Cyclone Bulbul has faded away, normal flow of northeasterly/easterly winds will once again resume over Chennai and South India, leading to dispersal of Pollutants and clear weather.
These winds will continue for another four to five days. Moreover, remnants of Storm Nakri will travel towards Southwest Bay of Bengal, causing scattered rains and thundershowers over Chennai, which will further improve the air quality.
Image Credit: Deccan Herald
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