The bedrock topography of Starbuck Glacier, Antarctic Peninsula, as determined by radio-echo soundings and flow modeling

被引：21

作者：

Farinotti, Daniel ^{[1
,2
]}

King, Edward C. ^{[3
]}

Albrecht, Anika ^{[4
]}

Huss, Matthias ^{[5
]}

Gudmundsson, G. Hilmar ^{[3
,6
]}

机构：

[1] Swiss Fed Inst Technol, Lab Hydraul Hydrol & Glaciol VAW, Zurich, Switzerland

[2] German Res Ctr Geosci GFZ, Potsdam, Germany

[3] British Antarctic Survey, NERC, Cambridge CB3 0ET, England

[4] Univ Potsdam, Potsdam, Germany

[5] Univ Fribourg, Dept Geosci, CH-1700 Fribourg, Switzerland

[6] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou, Peoples R China

来源：

ANNALS OF GLACIOLOGY | 2014年 / 55卷 / 67期

关键词：

Antarctic glaciology; glaciological instruments and methods; ground-penetrating radar; ice-shelf tributary glaciers; radio-echo sounding; ICE-THICKNESS DISTRIBUTION; WEST ANTARCTICA; SURFACE VELOCITY; RADAR SURVEYS; SHELF; COLLAPSE; LARSEN; STREAM; DRAINAGE; VOLUME;

D O I：

10.3189/2014AoG67A025

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

A glacier-wide ice-thickness distribution and bedrock topography is presented for Starbuck Glacier, Antarctic Peninsula. The results are based on 90 km of ground-based radio-echo sounding lines collected during the 2012/13 field season. Cross-validation with ice-thickness measurements provided by NASA's IceBridge project reveals excellent agreement. Glacier-wide estimates are derived using a model that calculates distributed ice thickness, calibrated with the radio-echo soundings. Additional constraints are obtained from in situ ice flow-speed measurements and the surface topography. The results indicate a reverse-sloped bed extending from a riegel occurring similar to 5 km upstream of the current grounding line. The deepest parts of the glacier are as much as 500 m below sea level. The calculated total volume of 80.7 +/- 7.2 km(3) corresponds to an average ice thickness of 312 +/- 30 m.

引用

页码：22 / 28

页数：7

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