Photogrammetric analysis of 1984–89 surface altitude change of the partially debris-covered Eliot Glacier, Mount Hood, Oregon, U.S.A.

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Abstract
Photogrammetric analysis of Eliot Glacier, Mount Hood, Oregon indicates an average thinning of the ablation area of 4.2 m during 1984–89. Thinning is generally more marked near the equilibrium line, where debris cover is absent, than on the lowest part of the glacier, where superglacial debris thickness is greater than 1.0 m. The pattern of glacier thickness change is partly related to the reduction of ablation with increasing debris thickness, though flow kinematics must also be important to charge in ice thickness.