@article{oai:nipr.repo.nii.ac.jp:00003812,
 author = {Mitani, Atau and Shoji, Hitoshi and Langway, Chester C.,Jr. and Clausen, Henrik B.},
 journal = {Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology},
 month = {Sep},
 note = {P(論文), 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},
 title = {Pore close-off regions observed in polar firn/ice core samples (abstract)},
 volume = {7},
 year = {1993}
}