A reconstruction of flow of alpine glaciers during the Last Glacial Maximum in the Hidaka Range, central Hokkaido

LIU Dali; Yugo ONO; Renji NARUSE

doi:10.5331/seppyo.60.47

LIU Dali, Yugo ONO, Renji NARUSE

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Keywords: glacial landforms, equilibrium line altitude, mass balance, glacier ice temperature, glacier flow

JOURNAL FREE ACCESS

1998 Volume 60 Issue 1 Pages 47-54

DOI https://doi.org/10.5331/seppyo.60.47

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Published: January 15, 1998 Received: October 20, 1997 Available on J-STAGE: August 07, 2009 Accepted: November 04, 1997 Advance online publication: - Revised: -
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Date of correction: August 07, 2009 Reason for correction: - Correction: ABSTRACT Details: Wrong : Flow conditions were reconstructed for 18 alpine glaciers in the Hidaka Range, during the LGM (Last Glacial Maximum, about 18, 000 y.B.P.), assuming a plastic and laminar flow without basal sliding.Reconstructed annual discharge through the cross section at the ELA (Equilibrium Line Altitude)on 18 glaciers almost coincided with the amount of reconstructed annual net ablation (or accumulation)below(or above)the ELA, when the mean ice temperature was assumed to be -7°C and -8°C, together with assumed air temperature cooling of 6°8°C.The flow velocity range at the center of the ELA was between 1 and 20 m/a, depending on the surface gradient and the ice thickness.Comparison of these flow velocities with those of present day glaciers, without basal sliding, suggests that the glaciers of the Hidaka Range during the LGM were similar in character to small modern cirque and valley glaciers in the world.
Right : Flow conditions were reconstructed for 18 alpine glaciers in the Hidaka Range, during the LGM (Last Glacial Maximum, about 18, 000 y.B.P.), assuming a plastic and laminar flow without basal sliding.Reconstructed annual discharge through the cross section at the ELA (Equilibrium Line Altitude)on 18 glaciers almost coincided with the amount of reconstructed annual net ablation (or accumulation)below(or above)the ELA, when the mean ice temperature was assumed to be -7°C and -8°C, together with assumed air temperature cooling of 6°8°C.The flow velocity range at the center of the ELA was between 1 and 20 m/a, depending on the surface gradient and the ice thickness.Comparison of these flow velocities with those of present day glaciers, without basal sliding, suggests that the glaciers of the Hidaka Range during the LGM were similar in character to small modern cirque and valley glaciers in the world.

Abstract

Flow conditions were reconstructed for 18 alpine glaciers in the Hidaka Range, during the LGM (Last Glacial Maximum, about 18, 000 y.B.P.), assuming a plastic and laminar flow without basal sliding.Reconstructed annual discharge through the cross section at the ELA (Equilibrium Line Altitude)on 18 glaciers almost coincided with the amount of reconstructed annual net ablation (or accumulation)below(or above)the ELA, when the mean ice temperature was assumed to be -7°C and -8°C, together with assumed air temperature cooling of 6°8°C.The flow velocity range at the center of the ELA was between 1 and 20 m/a, depending on the surface gradient and the ice thickness.Comparison of these flow velocities with those of present day glaciers, without basal sliding, suggests that the glaciers of the Hidaka Range during the LGM were similar in character to small modern cirque and valley glaciers in the world.

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