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Technologies for retrieving sediment cores in Antarctic subglacial settings.

Hodgson, D.A. and Bentley, M.J. and Smith, J.A. and Klepacki, J. and Makinson, K. and Smith, A.M. and Saw, K. and Scherer, R. and Powell, R. and Tulaczyk, S. and Rose, M. and Pearce, D. and Mowlem, M. and Keen, P. and Siegert, M.J. (2016) 'Technologies for retrieving sediment cores in Antarctic subglacial settings.', Philosophical transactions of the Royal Society A : mathematical, physical and engineering sciences., 374 (2059). p. 20150056.

Abstract

Accumulations of sediment beneath the Antarctic Ice Sheet contain a range of physical and chemical proxies with the potential to document changes in ice sheet history and to identify and characterize life in subglacial settings. Retrieving subglacial sediments and sediment cores presents several unique challenges to existing technologies. This paper briefly reviews the history of sediment sampling in subglacial environments. It then outlines some of the technological challenges and constraints in developing the corers being used in sub-ice shelf settings (e.g. George VI Ice Shelf and Larsen Ice Shelf), under ice streams (e.g. Rutford Ice Stream), at or close to the grounding line (e.g. Whillans Ice Stream) and in subglacial lakes deep under the ice sheet (e.g. Lake Ellsworth). The key features of the corers designed to operate in each of these subglacial settings are described and illustrated together with comments on their deployment procedures.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1098/rsta.2015.0056
Date accepted:17 June 2015
Date deposited:24 March 2016
Date of first online publication:14 December 2015
Date first made open access:14 December 2016

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