Winds of Change: Delhi Breathes Easier, But for How Long?

Delhi experienced a brief respite from severe air pollution on Tuesday as winds of up to 15 kmph helped clear the skies. The Air Quality Index (AQI) improved from "severe" to "very poor" levels, offering a visible change from the dense smog of the previous day. This improvement is attributed to strong westerly to northwesterly winds, with forecasts indicating consistent wind speeds likely until Friday, potentially leading to further air quality enhancement.

Despite the temporary improvement, long-term data analysis suggests that the air quality challenges for Delhi are far from over. Experts predict a decline in air quality towards the end of December and into early January, primarily driven by dropping temperatures, increased fog, and stable atmospheric conditions that trap local pollutants. This pattern is typical for Delhi, with a secondary pollution peak often occurring in late December and early January.

Historically, Delhi faces two major pollution spikes annually. The first, observed in late October and early November, is linked to stubble burning and Diwali celebrations. The second, usually occurring later in December or early January, is exacerbated by factors such as waste burning, low temperatures, and dense fog, all contributing to prolonged periods of "severe" air quality.