Pore close-off regions observed in polar firn/ice core samples (abstract)

• Main Authors: Atau Mitani, Hitoshi Shoji, Chester C.,Jr. Langway, Henrik B. Clausen
• Format: Report
• Language: English
• Published: Faculty of Science, Toyama University 1993
• Subjects: 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=3812; http://id.nii.ac.jp/1291/00003812/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=3812&item_no=1&attribute_id=18&file_no=1

The transformation of snow and firn to ice is defined by the acquisition of "zero permeability" and takes place at a density of about 0.8g/(cm)^3. The observation of depth intervals for the transformation are important for understanding age difference between air-bubble and ice matrices. A qualitative measure of permeability was obtained by using a continuous air-suction system which was applied to a microtomed plane of each core sample. With this experimental method, each data point was resolved in 1.6cm increments. Core samples were prepared from the G6 (73