DOI: 10.1029/2009gl040389
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Abstract: [1] In this letter we analyze the frictional contact forces during and immediately after the collapse of a weak snowpack layer, when the sliding plane consists of the freshly collapsed and crushed, but not yet eroded granular debris of the weak layer. The results from thirty-four field experiments show that frictional contact forces per unit area are on the order of 0.6 times the normal stress, equivalent to a friction angle close to 30 degrees. The measurements show that there is a transient, sharp drop in…

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