Indian Scientists Get Breakthrough in Cloud Seeding

27 Oct 2023

Context:

  • Cloud seeding experiments in Maharashtra’s Solapur region resulted in 18 per cent more rainfall than usual, as per a study published in the Bulletin of the American Meteorological Society (BAMS).

Ministry of Earth Sciences’ Initiative: Experiment on Cloud Seeding with Hygroscopic Method

  • The experiment involved hygroscopic cloud seeding, which is done in warm convective clouds with a cloud base height greater than zero degree Celsius. 
  • Calcium chloride particles were released at the convective cloud base to trigger rainfall.
  • The study was part of a project initiated by the Ministry of Earth Sciences and highlights the potential of cloud seeding as a method to alleviate water stress in certain regions.

Cloud Seeding

What are the two types of cloud seeding?

  • Hygroscopic cloud seeding: It aims at speeding up droplet coalescence in liquid clouds, leading to production of large droplets that start to precipitate. 
  • Glaciogenic cloud seeding: It triggers ice production in supercooled clouds, leading to precipitation. 
    • Glaciogenic cloud seeding is usually done by dispersing efficient ice nuclei, such as silver iodide particles or dry ice (solid carbon dioxide) into the cloud.

Benefits of Cloud Seeding

  • Cloud seeding is used all over the world as a method for:
    • Enhancing winter snowfall and increasing mountain snowpack
    • Supplementing the natural water supply available to communities of the surrounding area.

News Source: Economic Times

 

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