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- W2115653671 abstract "A geometrical force balance that links stresses to ice bed coupling along a flow band of an ice sheet was developed in 1988 for longitudinal tension in ice streams and published 4 years later. It remains a work in progress. Now gravitational forces balanced by forces producing tensile, compressive, basal shear, and side shear stresses are all linked to ice bed coupling by the floating fraction ϕ of ice that produces the concave surface of ice streams. These lead inexorably to a simple formula showing how ϕ varies along these flow bands where surface and bed topography are known: ϕ = h O / h I with h O being ice thickness h I at x = 0 for x horizontal and positive upslope from grounded ice margins. This captures the basic fact in glaciology: the height of ice depends on how strongly ice couples to the bed. It shows how far a high convex ice sheet (ϕ = 0) has gone in collapsing into a low flat ice shelf (ϕ = 1). Here ϕ captures ice bed coupling under an ice stream and h O captures ice bed coupling beyond ice streams." @default.
- W2115653671 created "2016-06-24" @default.
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- W2115653671 date "2009-01-01" @default.
- W2115653671 modified "2023-09-26" @default.
- W2115653671 title "Variations of ice bed coupling beneath and beyond ice streams: The force balance" @default.
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- W2115653671 doi "https://doi.org/10.1029/2008jb005714" @default.
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