A Relation Between Reflectivity and Mean Fall Speed in Hail.
Abstract
Vertical winds in precipitation can be derived from the Doppler velocity spectrum by comparing (V sub 0), the measured power-weighted mean vertical velocity, with (w sub 0), the mean obtained from the reflectivity factor, (Z sub e). In order to do this, the constants in the expression (W sub 0) = A(Z sup b, sub e) must be evaluated. This has been done previously by Rogers for rain, assuming Rayleigh scattering. In this paper, the formula is extended to the non-Rayleigh case of hail spectra. It is shown that b varies with wavelength, and that A depends both on wavelength and on whether the hail is wet or dry.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 05, 1975
- Accession Number
- ADA011454
Entities
People
- Rosemary M. Dyer
Organizations
- Air Force Cambridge Research Laboratories