Ice-shelf basal morphology from an upward-looking multibeam system deployed from an autonomous underwater vehicle

Dutrieux, Pierre ORCID: https://orcid.org/0000-0002-8066-934X; Jenkins, Adrian ORCID: https://orcid.org/0000-0002-9117-0616; Nicholls, Keith W. ORCID: https://orcid.org/0000-0002-2188-4509. 2016 Ice-shelf basal morphology from an upward-looking multibeam system deployed from an autonomous underwater vehicle. In: Dowdeswell, J.A.; Canals, M.; Jakobsson, M.; Todd, B.J.; Dowdeswell, E.K.; Hogan, K.A. ORCID: https://orcid.org/0000-0002-1256-8010, (eds.) Atlas of submarine glacial landforms: modern, Quaternary and ancient. London, Geological Society of London, 219-220. (Geological Society Memoir, 46, 46).

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Abstract/Summary

The huge cavities beneath floating Antarctic ice shelves have only been explored recently by autonomous underwater vehicles (AUVs). Oceanic waters above the in situ freezing point melt those faces of marine-terminating glaciers and ice shelves with which they come into contact. This, in turn, impacts the dynamics of ice sheets as the reduction in buttressing allows the ice to flow faster into the ocean, increasing their contribution to eustatic sea-level rise (Shepherd et al. 2012). Pine Island Glacier (PIG) in West Antarctica (Fig. 1a, d) is an example, and has been accelerating and thinning over past decades, and still appears to be in retreat. This is driven by unpinning from a seabed ridge and exposure to high ocean temperatures of up to 1°C at the grounding line (Jenkins et al. 2010) that are subject to climatically forced variability (Dutrieux et al. 2014a).

Item Type:	Publication - Book Section
Digital Object Identifier (DOI):	10.1144/M46.79
Programmes:	BAS Programmes > BAS Programmes 2015 > Polar Oceans
ISBN:	9781786202680
ISSN:	0435-4052
NORA Subject Terms:	Marine Sciences
Date made live:	09 Jan 2017 09:32 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/515705

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