Probe technologies for clean sampling and measurement of subglacial lakes

Mowlem, Matt; Saw, Kevin; Brown, Robin; Waugh, Edward; Cardwell, Christopher L. ORCID: https://orcid.org/0000-0003-1305-4174; Wyatt, James; Magiopoulos, Iordanis; Keen, Peter; Campbell, Jon; Rundle, Nicholas; Gkritzalis-Papadopoulos, Athanasios. 2016 Probe technologies for clean sampling and measurement of subglacial lakes. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 374 (2059). 20150267. 10.1098/rsta.2015.0267

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Text © 2016 The Royal Society This document is the author’s final manuscript version of the journal article following the peer review process. Some differences between this and the publisher’s version may remain. You are advised to consult the publisher’s version if you wish to cite from this article. http://rspb.royalsocietypublishing.org Probe technologies for sterile sampling and measurement of subglacial lakes - no track changes.docx - Accepted Version Download (5MB)

Abstract/Summary

It is 4 years since the subglacial lake community published its plans for accessing, sampling, measuring and studying the pristine, and hitherto enigmatic and very different, Antarctic subglacial lakes, Vostok, Whillans and Ellsworth. This paper summarizes the contrasting probe technologies designed for each of these subglacial environments and briefly updates how these designs changed or were used differently when compared to previously published plans. A detailed update on the final engineering design and technical aspects of the probe for Subglacial Lake Ellsworth is presented. This probe is designed for clean access, is negatively buoyant (350 kg), 5.2 m long, 200 mm in diameter, approximately cylindrical and consists of five major units: (i) an upper power and communications unit attached to an optical and electrical conducting tether, (ii)–(iv) three water and particle samplers, and (v) a sensors, imaging and instrumentation pack tipped with a miniature sediment corer. To date, only in Subglacial Lake Whillans have instruments been successfully deployed. Probe technologies for Subglacial Lake Vostok (2014/15) and Lake Ellsworth (2012/13) were not deployed for technical reasons, in the case of Lake Ellsworth because hot-water drilling was unable to access the lake during the field season window. Lessons learned and opportunities for probe technologies in future subglacial access missions are discussed.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1098/rsta.2015.0267
ISSN:	1364-503X
Date made live:	25 Jan 2016 11:41 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/512692

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