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Record #173383:

Transmission of basal variability to a glacier surface / G. Hilmar Gudmundsson.

Title: Transmission of basal variability to a glacier surface / G. Hilmar Gudmundsson.
Author(s): Gudmundsson, G. Hilmar.
Date: 2003.
In: Journal of Geophysical Research. (2003.), Vol. 108(B5), 2253 (2003)
Abstract: Investigates effects on glacier surface of flow disturbances created by bedrock topography and spatial variations in basal lubrication. Develops analytical solutions based on perturbation theory describing transient evolution of flow disturbances in free-surface gravity-driven linear Stokes flow down inclined plane in 3-D. Deals rigorously with horizontal stress gradients and does not limit to spatial scales long in comparison with ice thickness. Transfer depends strongly on ratio of sliding to deformational velocity. Above a minimum slip ratio, transfer amplitude reaches local maximum for undulations spanning 3-8 times ice thickness. Presents first solutions for evolution of surface undulations of finite transverse width. Examines propagation and decay of small-amplitude surface undulations in 3-D. Theory not limited to ice masses.
Notes:

Journal of Geophysical Research. Vol. 108(B5), 2253 :ETG 9.1-9.19 (2003).

Keywords: 551.32 -- Glaciology.
551.324 -- Land ice.
551.324.51 -- Land ice, theory of flow.
551.324.8 -- Land ice, structure and surface features.
551.331.5 -- Glacial erosion and protection. Sub-glacial topography.
519.673 -- Modelling.
E5 -- Glaciology: land ice.
SPRI record no.: 173383

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100 1# ‡aGudmundsson, G. Hilmar.
245 10 ‡aTransmission of basal variability to a glacier surface /‡cG. Hilmar Gudmundsson.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2003.
300 ## ‡ap. ETG 9.1-9.19 :‡bdiags.
500 ## ‡aJournal of Geophysical Research. Vol. 108(B5), 2253 :ETG 9.1-9.19 (2003).
520 3# ‡aInvestigates effects on glacier surface of flow disturbances created by bedrock topography and spatial variations in basal lubrication. Develops analytical solutions based on perturbation theory describing transient evolution of flow disturbances in free-surface gravity-driven linear Stokes flow down inclined plane in 3-D. Deals rigorously with horizontal stress gradients and does not limit to spatial scales long in comparison with ice thickness. Transfer depends strongly on ratio of sliding to deformational velocity. Above a minimum slip ratio, transfer amplitude reaches local maximum for undulations spanning 3-8 times ice thickness. Presents first solutions for evolution of surface undulations of finite transverse width. Examines propagation and decay of small-amplitude surface undulations in 3-D. Theory not limited to ice masses.
530 ## ‡aAlso issued online ‡uurn:doi:10.1029/2001JB002107‡uhttps://dx.doi.org/10.1029/2001JB002107
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.51 -- Land ice, theory of flow.‡2udc
650 07 ‡a551.324.8 -- Land ice, structure and surface features.‡2udc
650 07 ‡a551.331.5 -- Glacial erosion and protection. Sub-glacial topography.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
773 0# ‡7nnas ‡tJournal of Geophysical Research. ‡gVol. 108(B5), 2253 (2003) ‡wSPRI-35252
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