The Sec_??_nd glaze storm in Nagano Prefecture, 1923

Abstract

The author has already published a report on the remarkable glaze storm which occurred on January 22 and 23, 1923 in Nagauo Prefecture, Japan. (this journal 1923 p. 48-49). On April 5, 1923, a similar storm occurred in the same Prefecture, which was of a remarkably wide extent, covering the middle part of the Prefecture in the region near the mountain ranges facing the slope toward the Pacific and Japan Sea coasts respectively. The phenomenon was apparently due to the encounter of cold and warm air currents on the rear of a squall line which traversed the district at that time. The glaze occurred in a zone between the rain and snow areas, apparently only in those regions where the cold current was developed to a proper degree. The glaze generally set in at a high level and proceeded from thence toward the lower countries. At the upper boundary of the zone, glaze gradually yielded to snow in amount as the level ascent and a little above there was no trace of glaze but snow. The orographic conditions seem to affect remarkable the development of the warm and cold currents, so that the belt of region visited by the glaze shows a very irregular trend, Comparing the present case with the former, the author noticed that:-
(1) Owing to the greater amount of absorption of the solar radiation by the object consisting the core of glaze than that by ice itself a considerable space was formed by the melting of the ice near the core.
(2) The unsymmetrical growth of glaze on the wind side of any object was equally remarkable this time as on the last occasion.
(3) The glaze on telegraphic wires grew toward one side or up ward according to the intensi_??_y and direction of the wind prevailing at that time. When the inner part of the mass of ice in contact with the wire melted, it turned (about 70° to 180°) down by the gravity, then it melted quickly at the upper side of the wires and at last fell down, leaving a cavity as shown in fig. in p. 139.