Cloud Seeding - Weather Modification

  • Often, cold clouds do not precipitate for two reasons:

    1. cloud does not have enough ice nuclei (remember, ice particles will likely grow more readily than water particles)

    2. not enough vapor in the cloud (e is to low)

  • Hence, the idea of cloud seeding:

    • consider the cloud to the right -->>

      • es (water) = 5 mb
      • es (ice) = 2 mb
      • e (cloud) = 3 mb
    • ice could grow, but don't have enough ice nuclei....., what to do????

    • add more ice nuclei to a cloud - form more ice particles in the cloud that may grow to precip size