Abstract

Experiments at Weissfluhjoch, Davos, Switzerland, compared mass flux measured by rocket-shaped snowdrift gages (modified Mellor traps), with gages made of porous filter fabric, and with several electronic systems. A new method of electronic analysis gave results similar to the mass flux measured by mechanical traps. The experiments also reexamined the vertical profile of drift flux in the vicinity of the ridge crest, confirming the flux maximum at about 1 m height above the ridge crest, and adding details near the surface. Profiles measured at a secondary change in the windward ridge face, within a few meters of the crest, showed only a slight maximum, supporting the view that the drift flux maximum develops near the crest.

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