The departure of monsoon is now near. In this episode, the clouds are clearing the air of Delhi-NCR. This is the reason that due to continuous rain for the last two days, the air health has remained in the satisfactory to average category. For the second consecutive day, the worst situation has been in Gurugram. The AQI here has been recorded as 136. A day earlier this figure was 141. On the other hand, the AQI of Delhi and Ghaziabad cities remained in satisfactory category with 109 and 106 respectively on Wednesday. Experts predict that after the departure of monsoon, the pollution meter will rise sharply and the air quality may reach the poor to very poor category.
According to Dr. SK Tyagi, former Additional Director, Central Pollution Control Board (CPCB), various sources are responsible for pollution in Delhi-NCR. Incidents of stubble burning have been recorded in the neighboring states of Delhi-NCR. Although its smoke has not yet reached Delhi-NCR, but due to locally flying dust and other pollutants, the health of the air is deteriorating. Due to rain for the last two days, the pollutants present in the atmosphere have settled on the ground. After the end of the rainy season in the next two to three days, it will help the pollutants to settle and the breathlessness of Delhi-NCR will start again.
Wind speed will be low, mixing height and ventilation index will decrease
According to the Indian Institute of Tropical Meteorology, with the decrease in wind speed in the next 24 hours, the mixing height and ventilation index will also decrease. Winds coming from east and south-east direction will continue and the air quality will remain in satisfactory category from September 22 to 24. At the same time, the wind speed can be recorded from eight to 22 kilometers per hour. The mixing height can be 1300 meters and the ventilation index is 4300 square meters per second, while on Wednesday the mixing height was 2100 meters and the ventilation index was 4500 square meters per second. Explain that if the ventilation index is less than six thousand square meters per second and the wind speed is less than 10 kilometers per hour, it does not help in spreading the pollutants and pollution increases.
Particles larger than 2.5 micrometers accounted for 51 percent of PM10
According to the Centre’s air standards body Safar India, in the last 24 hours, the share of particles larger than 2.5 micrometers in PM 10 has been 51 percent. The air quality is likely to remain in the satisfactory category considering the possibility of rain for the next two days. At the same time, the wind speed will also be moderate. On Wednesday, the level of PM 10 was recorded at 95 and the level of PM 2.5 was 44 micrograms per cubic meter.
Rain will be heavy on Thursday, yellow alert issued
The weather remained pleasant throughout the day in Delhi-NCR on Wednesday. By noon the weather took a turn and heavy rain was recorded at some places. Till 5.30 pm, 2.8 mm of rain was recorded in Delhi and 1.5 mm in Gurugram. Apart from this, it has also rained in Noida, Faridabad and Greater Noida. The Meteorological Department has forecast that heavy rain can be recorded at some places on Thursday. The department has issued a yellow alert regarding this.