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Time-dependent basal stress conditions beneath Black Rapids Glacier, Alaska, USA, inferred from measurements of ice deformation and surface motion

Dates

Year
2006

Citation

Amundson, J. M., Truffer, M., and Luethi, M. P., 2006, Time-dependent basal stress conditions beneath Black Rapids Glacier, Alaska, USA, inferred from measurements of ice deformation and surface motion: Journal of Glaciology, v. 52, no. 178, p. 347-357.

Summary

Observations of surface motion and ice deformation from 2002-03 were used to infer mean stress fields in a cross-section of Black Rapids Glacier, Alaska, USA, over seasonal timescales. Basal shear stresses in a well-defined zone north of the center line (orographic left) were approximately 7% and 16% lower in spring and summer, respectively, than in winter. Correspondingly higher stresses were found near the margins. These changes in the basal shear stress distribution were sufficiently large to cause mean surface velocities to be 1.2 and 1.5 times larger in spring and summer than in winter. These results were inferred with a simple inverse finite-element flow model that can successfully reproduce bulk surface velocities and tiltmeter [...]

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Data source
File Processing
File Process
Type
End Note
Reference Item
3397 record import test
Reference File
NWBLCC-20160406.xml

Additional Information

Identifiers

Type Scheme Key
ISSN http://sciencebase.gov/vocab/identifierScheme 0022-1430, 0022-1430

Citation Extension

journalJournal of Glaciology
parts
typeNotes
value9397
typePages
value347-357
typeVolume
value52
typeNumber
value178
citationTypeJournal Article

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