Satellite images displayed at the National Snow and Ice Data Centre in March 2008 of the Wilkins Ice-sheet [part of the West Antarctic Ice-shelf - WAIS] melting, have me worried:
The report by the US National Snow and Ice Data Center discusses the latest images in context of other large ice-melt events.
"The Wilkins is one of a string of ice shelves that have collapsed in the West Antarctic Peninsula in the past thirty years. The Larsen B became the most well-known of these, disappearing in just over thirty days in 2002. The Prince Gustav Channel, Larsen Inlet, Larsen A, Wordie, Muller, and the Jones Ice Shelf collapses also underscore the unprecedented warming in this region of Antarctica."
See the British Antarctic Survey [BAS] PDF report - British Antarctic Survey's version of this joint release.
The NSIDC have reported on other disturbing breakups on the Wilkins Ice Shelf and the Larsen B collapse.