Collection kernels for the capture of Slver Iodide nuclei by cloud water droplets
Keywords:Cloud and Precipitation Microphysics
AbstractCapture of Agl nuclei by cloud drops, through the microphysical processes of inertial and interceptive impaction, Brownian diffusion, and wake capture is expressed in terms of a collection kernel as a function of Agl nuclei and cloud drop radii. Also, the effect of phoretic forces and turbulence on the collection kernel is assessed. For the capture of 0.01 to I0 um radius Agl by cloud droplets with radii 50 um or greater, the collection kernels are greater than 10^-6. These kernels are large enough to bring practical concentrations of Agl nuclei into contact with cloud drops at a rate such asto cause rapid freezing of cloud water accompanied by a large heat release if the updraft portion of a cloud is seeded. However, impractically large amounts of nuclei may be required to contact droplets in the downdraft portion of a cloud, and more so, if drop evaporation is rapid and the drops are positively charged.
How to Cite
Mathews, L., & St.-Amand, P. (1977). Collection kernels for the capture of Slver Iodide nuclei by cloud water droplets. The Journal of Weather Modification, 9(1), 125–145. https://doi.org/10.54782/jwm.v9i1.630
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