Air Bubbles in Ice
- 1 March 1961
- journal article
- Published by IOP Publishing in Proceedings of the Physical Society
- Vol. 77 (3), 757-768
- https://doi.org/10.1088/0370-1328/77/3/327
Abstract
The opacity of ice formed from water containing dissolved air is due to the presence of bubbles of air in the ice. Both bubble concentration and sizes were found to depend on the rate of freezing. Bulk water saturated with air at 0°C was found to freeze into ice containing about six bubbles per mm3 when freezing proceeded at 0.5 mm min-1 and 300 per mm3 at a rate of 5 mm min-1. Bubbles were formed at the ice-water boundary when the concentration of dissolved air reached a critical value which, for rates of freezing greater than 2 mm min-1, corresponded to a supersaturation ratio of 30. Agitation of the water could prevent the critical concentration from being attained and clear ice then formed. Other factors which influenced bubble concentrations and sizes were the amount of dissolved air, pressure, thickness of the layer of water ahead of the growing ice and escape of bubbles by buoyancy. The magnitude and extent of the air concentration gradient ahead of the ice were estimated from theory. Bubbles in ice were found to change shape with time particularly when under the influence of a temperature gradient.This publication has 7 references indexed in Scilit:
- The fragmentation and electrification of freezing water dropsQuarterly Journal of the Royal Meteorological Society, 1960
- Dissolved Oxygen in Rainwater and Its Relation to the Raincloud Structure (I). Precipitation from September to MarchJournal of the Meteorological Society of Japan. Ser. II, 1959
- Kennzeichen atmosphärischer EispartikelnZeitschrift für angewandte Mathematik und Physik, 1958
- Techniques of Zone Melting and Crystal GrowingSolid State Physics, 1957
- Solute Redistribution by RecrystallizationJournal of Applied Physics, 1954
- Studies on the physiology of frozen plants and animals in the arcticJournal of Cellular and Comparative Physiology, 1953
- On the Stability of Gas Bubbles in Liquid-Gas SolutionsThe Journal of Chemical Physics, 1950