Warmer weather reduces pollutants in Mumbai’s air
System of Air Quality Weather Forecasting and Research (SAFAR) estimated that there would be an increase in pollution on Tuesday with a predicted AQI of 128 (moderate)mumbai Updated: Dec 19, 2016 23:47 IST
For the first time since November, four of 10 locations in Mumbai recorded ‘good’ air quality on Monday even as temperatures were at the normal mark in south Mumbai and the suburbs.
The city recorded the pollutant-measuring indicator air quality index (AQI) at 119, falling under the ‘moderate’ category. The System of Air Quality Weather Forecasting and Research (SAFAR) estimated that there would be an increase in pollution on Tuesday with a predicted AQI of 128 (moderate).
AQI levels between 0-100 falls under the ‘good’ category, 101-200 is ‘moderate’ and that between 201-300 is ‘poor’. Mazgaon recorded the cleanest air in the city on Monday with an AQI of 65, followed by Bhandup, Colaba and Worli, all recording ‘good’ AQI levels (see box). On the other hand, Bandra-Kurla Complex was the only location in Mumbai that recorded a ‘poor’ AQI at 217 while all remaining locations recorded ‘moderate’ pollution.
Officials from the weather bureau said that a clear sky combined with high wind speed led to faster dispersion of pollutants from the city’s surface on Monday. “Pollutants released from vehicles and construction are not settling as the sea breeze has been setting in at the right time, sometimes early in the evening, clearing Mumbai’s air,” said Shubhangi Bhute, director, Regional Meteorological Centre, India Meteorological Department. “Since temperatures are likely to remain similar to Monday for the rest of the week, Mumbai can expect ‘moderate’ air quality to continue.”
Meanwhile, day temperatures both at the suburbs and south Mumbai were close to the normal mark. The night temperature, however, at the Santacruz weather station, representative of the suburbs, fell 1.3 degree Celsius below normal, at 17 degrees Celsius. The minimum temperature at Colaba was 0.3 degree Celsius above normal at 21 degrees Celsius.
“Cool winds from the northern parts of the country have brought down temperatures during the night time and early morning hours. Since there are hardly any clouds, the heat radiation from the surface is being dispersed as well,” said Bhute.
The weather bureau predicted a clear sky for Tuesday with day and night temperatures at 32 degrees Celsius and 17 degrees Celsius respectively.