Effective Dielectric Constant of the Atmosphere During Snowstorms and Its Influence upon Corona Losses

Heavy corona losses have been observed during snowstorms, particularly in Canada. The amount of these losses sometimes exceeds those during rainstorms. A tentative explanation is given based on the consideration of the ``effective dielectric constant'' during precipitation. Calculations and model measurements indicate a tremendous difference between rain and snow. The surface potential gradient during heavy snowstorms may be increased by as much as 10 to 20%.