APPLICATION OF THE DIELECTRIC PROFILING TECHNIQUE TO ICE CORE STUDIES

• Main Authors: / マエノ ノリカズ, John MOORE, Norikazu MAENO
• Format: Report
• Language: English
• Published: Institute of Low Temperature Science, Hokkaido University:(Present address) British Antarctic Survey, Natural Environment Research Council 1991
• Subjects: Dolleman; Dolleman Island; Mizuho; Mizuho Station; Antarc*; Antarctica; ice core; Polar meteorology and glaciology; Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=3645; http://id.nii.ac.jp/1291/00003645/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3645&item_no=1&attribute_id=18&file_no=1

The dielectric profiling (DEP) technique is described and some of the differences between it and standard electrical tools used in ice core analysis are discussed. The results of DEP analysis on two cores from different regions of Antarctica, Dolleman Island and Mizuho Station are described. DEP measurements on the Dolleman core are related to the chemical composition of the core, showing that DEP can provide a high accuracy measure of total ionic content of the ice. The measurements on the Mizuho core are compared with earlier dielectric measurements on the same core which show dramatic changes over the 15 year period between the measurements. A mechanism which can explain the changes and other effects noted from d. c. conductivity (ECM) experiments, is suggested. The mechanism is based on the theory of d. c. conduction via liquid acid veins at triple junctions in the ice.