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Spatial and temporal evolution of rapid basal sliding on Bench Glacier, Alaska, USA

Dates

Year
2005

Citation

MacGregor, K. R., Riihimaki, C. A., and Anderson, R. S., 2005, Spatial and temporal evolution of rapid basal sliding on Bench Glacier, Alaska, USA: Journal of Glaciology, v. 51, no. 172, p. 49-63.

Summary

We measured the surface velocity field during the summers of 1999 and 2000 on the 7 km long, 185 m thick Bench Glacier, Alaska, USA. In the spring of both years, a short-lived pulse of surface velocity, 2-4 times the annual mean velocity, propagated up-glacier from the terminus at a rate of similar to 200-250 m d super(-1). Displacement attributable to rapid sliding is similar to 5-10% of the annual surface motion, while the high-velocity event comprised 60-95% of annual basal motion. Sliding during the propagating speed-up event peaked at 6-14 cm super(-1), with the highest rates in mid-glacier. Continuous horizontal and vertical GPS measurements at one stake showed divergence and then convergence of the ice surface with the bed as [...]

Contacts

Tags

Provenance

Data source
File Processing
File Process
Type
End Note
Reference Item
NWBLCC Test to validate 3364 records in xml format
Reference File
NWBLCC-20160527b.xml

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme http://dx.doi.org/10.3189/172756505781829485
ISSN http://sciencebase.gov/vocab/identifierScheme 0022-1430, 0022-1430

Citation Extension

journalJournal of Glaciology
parts
typeNotes
value9420
typePages
value49-63
typeVolume
value51
typeNumber
value172
citationTypeJournal Article

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