Waves of sand and snow and the eddies which make them (1914) (14594657438)

Identifier: wavesofsandsnowe00corn (find matches)
Title: Waves of sand and snow and the eddies which make them
Year: 1914 (1910s)
Authors: Cornish, Vaughan, 1862-1948
Subjects: Waves
Publisher: London, T. F. Unwin (etc
Contributing Library: MBLWHOI Library
Digitizing Sponsor: Boston Library Consortium Member Libraries



Text Appearing Before Image:
Fig. 6Barchans of snow and sand.from photographs. being both narrower and flatter (Fig. 6). I sawmany hundreds of these structures which had beenproduced in ordinary fresh-fallen dry snow, butin the absence of any steep eminence to give mea good view-point I was unable to obtain a photo-graph showing how the prairie was dotted overwith these structures.
Text Appearing After Image:
3C So a. 115 SNOW-WAVES AND SNOW-RIPPLES 117 They do not have a long hfe as travelling waves,for in the still nights their surface sets hard. Itis the setting of the surface of the snow in exposedpositions, which occurs without any melting andre-freezing, which prevents snow-waves growing, assand-dunes grow, to large dimensions. Thus inweather when the temperature never rose to themelting-point, and when there was no sign of melt-ing in the sun, I found that snow-waves which wereformed on the prairie near Winnipeg on January25th had on the 28th a surface so hard that it wasscarcely dented by the heel of my moccasined foot.I found that this resistance was due to a hardsurface-layer ; inch thick. Pieces of this crustwhen broken off and held up to the sunlightwere seen to be a mosaic of small, translucent,icy blocks cemented firmly by opaque ice. Incopses near by the snow had no crust upon it. Isuggest that the setting of the drifted snow uponthe prairie is due to sublimation, the lower