eCite Digital Repository

Evidence of a hydrological connection between the ice divide and ice sheet margin in the Aurora Subglacial Basin, East Antarctica

Citation

Wright, AP and Young, DA and Roberts, JL and Schroeder, DM and Bamber, JL and Dowdeswell, JA and Young, NW and Le Brocq, AM and Warner, RC and Payne, AJ and Blankenship, DD and van Ommen, TD and Siegert, MJ, Evidence of a hydrological connection between the ice divide and ice sheet margin in the Aurora Subglacial Basin, East Antarctica, Journal of Geophysical Research, 117, (1) Article F01033. ISSN 0148-0227 (2012) [Refereed Article]


Preview
PDF
Restricted - Request a copy
21Mb
  

Copyright Statement

Copyright 2012 American Geophysical Union

DOI: doi:10.1029/2011JF002066

Abstract

Subglacial hydrology in East Antarctica is poorly understood, yet may be critical to the manner in which ice flows. Data from a new regional airborne geophysical survey (ICECAP) have transformed our understanding of the topography and glaciology associated with the 287,000 km2 Aurora Subglacial Basin in East Antarctica. Using these data, in conjunction with numerical ice sheet modeling, we present a suite of analyses that demonstrate the potential of the 1000 km-long basin as a route for subglacial water drainage from the ice sheet interior to the ice sheet margin. We present results from our analysis of basal topography, bed roughness and radar power reflectance and from our modeling of ice sheet flow and basal ice temperatures. Although no clear-cut subglacial lakes are found within the Aurora Basin itself, dozens of lake-like reflectors are observed that, in conjunction with other results reported here, support the hypothesis that the basin acts as a pathway allowing discharge from subglacial lakes near the Dome C ice divide to reach the coast via the Totten Glacier.

Item Details

Item Type:Refereed Article
Keywords:Antarctica, subglacial hydrology
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate and Climate Change not elsewhere classified
Author:Roberts, JL (Dr Jason Roberts)
Author:Young, NW (Mr Neal Young)
Author:Warner, RC (Dr Roland Warner)
Author:van Ommen, TD (Dr Tas van Ommen)
ID Code:77439
Year Published:2012
Web of Science® Times Cited:29
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-04-16
Last Modified:2017-10-25
Downloads:1 View Download Statistics

Repository Staff Only: item control page