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Overview of areal changes of the ice shelves on the Antarctic Peninsula over the past 50 years

Cook, Alison J.; Vaughan, David G.. 2010 Overview of areal changes of the ice shelves on the Antarctic Peninsula over the past 50 years. The Cryosphere, 4 (1). 77-98. 10.5194/tc-4-77-2010

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Abstract/Summary

In recent decades, seven out of twelve ice shelves around the Antarctic Peninsula (AP) have either retreated significantly or have been almost entirely lost. At least some of these retreats have been shown to be unusual within the context of the Holocene and have been widely attributed to recent atmospheric and oceanic changes. To date, measurements of the area of ice shelves on the AP have either been approximated, or calculated for individual shelves over dissimilar time intervals. Here we present a new dataset containing up-to-date and consistent area calculations for each of the twelve ice shelves on the AP over the past five decades. The results reveal an overall reduction in total ice-shelf area by over 28 000 km(2) since the beginning of the period. Individual ice shelves show different rates of retreat, ranging from slow but progressive retreat to abrupt collapse. We discuss the pertinent features of each ice shelf and also broad spatial and temporal patterns in the timing and rate of retreat. We believe that an understanding of this diversity and what it implies about the underlying dynamics and control will provide the best foundation for developing a reliable predictive skill for ice-shelf change.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.5194/tc-4-77-2010
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Ice Sheets
ISSN: 1994-0416
NORA Subject Terms: Marine Sciences
Meteorology and Climatology
Glaciology
Earth Sciences
Date made live: 25 Nov 2010 11:28
URI: http://nora.nerc.ac.uk/id/eprint/10755

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