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The use of air bubblers for maintaining ice-free areas in lakes and in the sea has been reported abundantly in the technical literature. This author (1962) reported his observations on two air bubbler installations in the Canadian Arctic to the Eighth International Conference on Coastal Engineering. The results of these investigations were, at that time, still inconclusive. Today, some of the mystery is resolved and it is the author's opinion that the existence of a heat reserve is the answer to the problem. Based on this premise, an attempt is made here to develop some guide lines for the proper utilization of this thermal reserve.

A GUIDE TO THE DESIGN OP AIR BUBBLERS FOR MELTING ICE