File(s) under permanent embargo
Channelized ice melting in the ocean boundary layer beneath Pine Island Glacier, Antarctica
journal contributionposted on 2023-05-18, 13:42 authored by Stanton, TP, Shaw, WJ, Truffer, M, Corr, HFJ, Peters, LE, Riverman, KL, Bindschadler, R, Holland, DM, Anandakrishnan, S
Ice shelves play a key role in the mass balance of the Antarctic ice sheets by buttressing their seaward-flowing outlet glaciers; however, they are exposed to the underlying ocean and may weaken if ocean thermal forcing increases. An expedition to the ice shelf of the remote Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet that has rapidly thinned and accelerated in recent decades, has been completed. Observations from geophysical surveys and long-term oceanographic instruments deployed down bore holes into the ocean cavity reveal a buoyancy-driven boundary layer within a basal channel that melts the channel apex by 0.06 meter per day, with near-zero melt rates along the flanks of the channel. A complex pattern of such channels is visible throughout the Pine Island Glacier shelf.
Department/SchoolInstitute for Marine and Antarctic Studies
PublisherAmer Assoc Advancement Science
Place of publication1200 New York Ave, Nw, Washington, USA, Dc, 20005
Rights statementCopyright 2013 The Authors