Glaciological and oceanographic evidence of high melt rates beneath Pine Island Glacier, West Antarctica

Jenkins, Adrian ORCID: https://orcid.org/0000-0002-9117-0616; Vaughan, David G. ORCID: https://orcid.org/0000-0002-9065-0570; Jacobs, Stanley S.; Hellmer, Hartmut H.; Keys, John R.. 1997 Glaciological and oceanographic evidence of high melt rates beneath Pine Island Glacier, West Antarctica. Journal of Glaciology, 43 (134). 114-121. https://doi.org/10.3189/S0022143000002872

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Abstract/Summary

Satellite imagery indicates that the floating terminus of Pine Island Glacier has changed little in extent over the past two decades. Data on the velocity and thickness of the glacier reveal that calving of 28 ± 4 Gt a-1 accounts for only half of the ice input near the grounding line. The apparently steady configuration implies that the remainder of the input is lost by basal melting at a mean rate of 12 ± 3 m a-1. Ocean circulation in Pine Island Bay transports +1°C waters beneath the glacier and temperatures recorded in melt-laden outflows show that heat loss from the ocean is consistent with the requirements of the calculated melt rate. The combination of iceberg calving and basal melting lies at the lower end of estimates for the total accumulation over the catchment basin, drawing into question previous estimates of a significantly positive mass budget for this part of the ice sheet.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.3189/S0022143000002872
Programmes:	BAS Programmes > Pre 2000 programme
ISSN:	0022-1430
Date made live:	14 Sep 2016 10:44 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/514497

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