Delhi Govt Postpones Cloud Seeding Trials Due to Low Moisture Content

Strategic Insights -

Delhi's Environment Minister Manjinder Singh Sirsa has announced that the city will postpone its cloud seeding trials due to low moisture levels, which are essential for the process to be effective. The minister disclosed that the trials will only proceed when the moisture content reaches above 30%. This decision comes after two planned trials were canceled earlier this week due to insufficient moisture. The recent cloud seeding operation conducted by IIT Kanpur in partnership with the Delhi government aimed to reduce particulate matter and improve air quality. Although the operation showed some reduction in PM10 levels, the actual data revealed a much smaller reduction of 6-10% in PM2.5 and PM10 concentrations.

Key Takeaways:

  • Three cloud seeding trials have been conducted so far, but none have led to rain activity in Delhi.
  • At least 50% moisture is needed for cloud seeding, and in the previous trials, the moisture level was less than 20%.
  • India Meteorological Department (IMD) informed the Delhi government that similar weather conditions, including low moisture, are expected on Thursday.
  • The cloud seeding trial yielded measurable particulate matter reductions, even with low cloud moisture levels.
  • IIT Kanpur believes that cloud seeding can contribute to improved air quality, even under limited moisture conditions.
  • Delhi government is in touch with IMD for updates on meteorological conditions and plans to conduct the fourth trial when the moisture content is above 30%.
  • Delhi government claims that cloud seeding can deliver tangible improvements in air quality when combined with technology and civic engagement.

Statistics:

  • 3 cloud seeding trials have been conducted in Delhi so far.
  • 50% moisture is needed for cloud seeding.
  • Previous trials had moisture levels less than 20%.
  • 41.9% reduction in particulate matter (PM10) in a recent cloud seeding operation between Mayur Vihar and Burari.
  • 6-10% reduction in PM2.5 and PM10 concentrations revealed by real-time data from IIT Kanpur.
  • 9 months ago, BJP-led central government admitted in Parliament that cloud seeding in Delhi was scientifically impossible, based on expert advice from IMD, CAQM, and CPCB.

Sources:

  • Delhi environment minister Manjinder Singh Sirsa
  • IIT Kanpur
  • Times of India (published in Times of India Online: "Delhi govt postpones cloud seeding trials due to low moisture content, again")