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Record #139281:

Seismic reflection evidence for a deep subglacial trough beneath Jakobshavns Isbrae, West Greenland / Ted S. Clarke, Keith Echelmeyer.

Title: Seismic reflection evidence for a deep subglacial trough beneath Jakobshavns Isbrae, West Greenland / Ted S. Clarke, Keith Echelmeyer.
Author(s): Clarke, Ted S.
Echelmeyer, Keith.
Date: 1996.
In: Journal of Glaciology. (1996.), Vol. 42(141) (1996)
Abstract: Reflection methods were used to determine ice thickness and basal topography of Isbrae, large, fast-moving outlet glacier. Data analysis method yields depth, position and slope of basal reflector from linear seismic array and single explosive source. Deep U-shaped trough was found under entire glacier, incised up to 1500 m into bedrock and 1200 m below sea level for 70 km. Centre-line thickness of ice was 2500 m, about 2.5 times that of ice sheet. There is high basal shear stress along glacier, with internal deformation playing dominant role.
Notes:

Journal of Glaciology. Vol. 42(141) :219-232 (1996).

Keywords: 550.34 -- Seismology.
551.324 -- Land ice.
551.324.29 -- Land ice, miscellaneous forms.
551.331.5 -- Glacial erosion and protection. Sub-glacial topography.
E5 -- Glaciology: land ice.
(*3) -- Arctic regions.
(*384) -- West Greenland.
SPRI record no.: 139281

MARCXML

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100 1# ‡aClarke, Ted S.
245 10 ‡aSeismic reflection evidence for a deep subglacial trough beneath Jakobshavns Isbrae, West Greenland /‡cTed S. Clarke, Keith Echelmeyer.
260 ## ‡a[S.l.] :‡b[s.n.],‡c1996.
300 ## ‡ap. 219-232 :‡bdiags., maps.
500 ## ‡aJournal of Glaciology. Vol. 42(141) :219-232 (1996).
520 3# ‡aReflection methods were used to determine ice thickness and basal topography of Isbrae, large, fast-moving outlet glacier. Data analysis method yields depth, position and slope of basal reflector from linear seismic array and single explosive source. Deep U-shaped trough was found under entire glacier, incised up to 1500 m into bedrock and 1200 m below sea level for 70 km. Centre-line thickness of ice was 2500 m, about 2.5 times that of ice sheet. There is high basal shear stress along glacier, with internal deformation playing dominant role.
650 07 ‡a550.34 -- Seismology.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.324.29 -- Land ice, miscellaneous forms.‡2udc
650 07 ‡a551.331.5 -- Glacial erosion and protection. Sub-glacial topography.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
651 #7 ‡a(*3) -- Arctic regions.‡2udc
651 #7 ‡a(*384) -- West Greenland.‡2udc
700 1# ‡aEchelmeyer, Keith.
773 0# ‡7nnas ‡tJournal of Glaciology. ‡gVol. 42(141) (1996) ‡wSPRI-20534
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20220929