Taking a shot at cloud seeding to disperse the smog that has covered Delhi may be a tad too ambitious, said experts. “Warm fog dispersal is a difficult process and to engineer even a slight drizzle would mean understanding the pollutants in a detailed manner,” top scientists associated with the Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) told The Indian Express.
At Pune’s Indian Institute of Tropical Meteorology (IITM), scientists involved with CAIPEEX, said that a campaign has been launched to conduct more observation studies first.
Last year, a tower was set up at Delhi airport to pick up detailed dynamics of fog. Preliminary studies were able to figure out the size of fog particles and their distribution. However, scientists have admitted that there is a need for detailed aerosol physical and chemical measurement and add them to fog formation and dissipation.
“We need to understand the chemistry involved in dissipating fog layers. Fog particles do not grow. They remain suspended in the air. We need to make these particles bigger so that they can disperse in a small drizzle. There are many aerosol particles and the available water vapour is shared among them to form fog droplets. To make these droplets larger, we need to understand the chemistry of the pollutants,” a scientist said.
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