Академическое издательство «Гео»

Snow structure, texture of snow layer, electric charge

KRIOSFERA ZEMLI, 2017, Vol. XXI, № 2, p. 11-24

Snow cover as an electrodynamic system

N.A. Kazakov

Sakhalin Department of Far-Eastern Geological Institute, FEB RAS,
25, Gorkogo street, Yuzhno-Sakhalinsk, 693023, Russia; kazakovna@fegi.ru

The electrical properties of snow in Southern Sakhalin have been experimentally studied. The experiments demonstrate that the electric charge of an ice crystal depends on its structure and that of a snow layer as a whole depends on its structure and texture. The charge of snow layer increases as ice crystals grow in size and the texture of ice layer develops. The highest charges of crystals in the layers of secondary-idiomorfic ice range from 0.0018 nK for faceted crystals to 0.008 nK for skeleton type of crystals shape. The specific electric charge varies from 0.001 nK for new precipitation snow to 0.17 nK for layers of secondary idiomorphic snow composed of faceted, skeleton and sectorial crystals. Ice crystals placed between two flat electrodes in the artificial electric field form vertical clusters similar to those forming the columnar and fiber texture of snow layers. They act as dielectric dipoles and surface charge separators. The snow cover in its natural bedding can be described as a flat dielectric waveguide in the electric field of the “atmosphere–lithosphere” system, i.e. as an electrodynamic system.

Snow structure, texture of snow layer, electric charge

DOI: 10.21782/KZ1560-7496-2017-2(11-24)