Dual-Polarization Radar Signatures of Rimed Snowflakes

Abstract

Dual-polarization radar variables, such as differential reflectivity $(\mathrm{Z}_{\mathrm{dr}})$, are simulated from observed microphysical property of snowflakes. The increases of particle mass and aspect ratio are found to have opposite effects on $\mathrm{Z}_{\mathrm{dr}}$, This contradictory effect is different in various riming condition. The results of simulation were adopted to interpret radar observations, which are found to agree with the current hypothesis of riming process.