Subglacial topography inferred from ice surface terrain analysis reveals a large un-surveyed basin below sea level in East Antarctica

被引：16

作者：

Le Brocq, A. M. ^{[1
]}

Hubbard, A. ^{[3
]}

Bentley, M. J. ^{[1
]}

Bamber, J. L. ^{[2
]}

机构：

[1] Univ Durham, Dept Geog, Durham DH1 3LE, England

[2] Univ Bristol, Bristol Glaciol Ctr, Bristol BS8 1SS, Avon, England

[3] Aberystwyth Univ, Inst Geog & Earth Sci, Aberystwyth SY23 2AX, Dyfed, Wales

来源：

GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 16期

基金：

英国自然环境研究理事会;

关键词：

D O I：

10.1029/2008GL034728

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A terrain analysis technique relating ice-surface plan curvature to basal topography is applied to the Antarctic Ice Sheet. The technique suggests complex bed topography and a large subglacial basin more than 1500 m below present day sea level under the Recovery Glacier and its catchment in East Antarctica. Despite the importance of accurate subglacial topography for understanding the nature of ice flow and for numerical modeling, available data in this region are sparse. The presence of a large area of ice grounded below sea level, flowing at elevated velocities could have significant implications for the potential stability of this region of East Antarctica, previously thought to contain only small areas of marine ice sheet. The catchment region alone contains an ice volume equivalent to 2.6 m of global sea level rise, therefore it is important that the nature of the basal conditions in this region are better understood.

引用

页数：6

共 24 条

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