New Delhi: Only for the third time in 21 years, not one day ‘dense fog’, i.e., visibility fell below 200 meters, has been recorded in the capital so far in December.
Before this, Delhi did not see solid fog in December 2000 and 2009.
Track the level of pollution in your Citynot, the IMD data for Perlam monitoring stations showed that only one moderate fog day, that is, the visibility of between 200 and 500 meters, has been reported this month – For three hours between 1:30 am and 4.30 in December 17.
Shallow fog (visibility between 500 and 1,000 meters) was recorded at 17 days.
Conversely, seven days of thick fog and 11 moderate fog days were recorded in December last year.
Even the average thick fog days in December are 7-10 days with a duration of up to 40 to 50 hours.
In addition, the city has seen 95 hours of fog this month until now, the lowest for December since 1985, when the Indian Meteorology Department (IMD) began to maintain records.
Before this, the lowest duration of the fog was in 1985, at 137 hours.
Meet officials said fog formation had been influenced this year with fewer moisture in the air and large-scale wind patterns.
Even though capital has so far recorded 18 fog days in December, much lower than usual.
According to IMD, usually, the number of fog days for December is 26 with a duration of 280 hours.
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Cloud Seening – Weather modification technology to help create rain to achieve various submissions behind this December low fog formation, RK Jenamani, Senior Scientist at the IMD, “The lack of availability of the moisture needed and a large-scale wind pattern is not profitable.
Forming fog.
More than 94% of moisture is needed for the formation of solid fog.
In addition, Western disturbances triggered the fog lost this time.
“IMD usually estimates the fog 12-24 hours before it occurs.
Because a few days remaining this month, meeting officials said there were fewer chances of forming solid fog in the next 12 hours.
“Given the fresh clouds that are most likely in the future, which leads to drizzle on December 28, atmosphere, may have superficial fog to moderate and low clouds with thick fog opportunities,” Jenamani said.
According to other senior officials who analyzed the fog pattern in Delhi, “Many micro meteorological conditions play an important role.
If the availability of moisture is not enough, if the temperature is low and high wind speeds, can affect the formation of fog.
The fog is formed when the micrometlesorological balance is reached.”