Hostname: page-component-7c8c6479df-5xszh Total loading time: 0 Render date: 2024-03-28T16:31:11.532Z Has data issue: false hasContentIssue false

Variations in ice rafted detritus on beaches in the South Shetland Islands: a possible climate proxy

Published online by Cambridge University Press:  28 September 2004

BRENDA L. HALL
Affiliation:
The Climate Change Institute, University of Maine, Orono, ME 04469, USA Department of Earth Sciences' University of Maine, Orono, ME 04469, USA
ETHAN R. PERRY
Affiliation:
Department of Earth Sciences' University of Maine, Orono, ME 04469, USA

Abstract

Raised beach ridges on Livingston Island of the South Shetland Islands display variations in both quantity and source of ice rafted detritus (IRD) received over time. Whereas the modern beach exhibits little IRD, all of which is of local origin, the next highest beach (∼250 14C yr BP) has large amounts, some of which comes from as far away as the Antarctic Peninsula. Significant quantities of IRD also were deposited ∼1750 14C yr BP. Both time periods coincide with generally cooler regional conditions and, at least in the case of the ∼250 yr old beach, local glacial advance. We suggest that the increases in ice rafting may reflect periods of greater glacial activity, altered ocean circulation, and/or greater iceberg preservation during the late Holocene. Limited IRD and lack of far-travelled erratics on the modern beach are both consistent with the ongoing warming trend in the Antarctic Peninsula region.

Type
Research Article
Copyright
© Antarctic Science Ltd 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)