KOPRI Repository

Basal channels drive active surface hydrology and transverse ice shelf fracture

Cited 0 time in scopus
Metadata Downloads
Title
Basal channels drive active surface hydrology and transverse ice shelf fracture
Other Titles
빙붕하부 채널로 인한 빙붕상부 하천망 생성 및 빙붕 붕괴 촉진
Authors
Christine F. Dow
Christopher J. Zappa
Duncan A. Young
Alexander L. Forrest
Kristin Poinar
Donald D. Blankenship
Chad A. Greene
Jamin S. Greenbaum
Lee, Won Sang
Subject
Glaciology
Keywords
Basal Channels; Nansen Ice Shelf; Sea Level Rise; Surface Hydrology
Issue Date
2018-06-13
Citation
Christine F. Dow, et al. 2018. "00RESEARCH ARTICLEGEOLOGYBasal channels drive active surface hydrology and transverse ice shelf fracture". SCIENCE ADVANCES, 4: 1-9.
Abstract
Ice shelves control sea-level rise through frictional resistance, which slows the seaward flow of grounded glacial ice. Evidence from around Antarctica indicates that ice shelves are thinning and weakening, primarily driven by warm ocean water entering into the shelf cavities. We have identified a mechanism for ice shelf destabilization where basal channels underneath the shelves cause ice thinning that drives fracture perpendicular to flow. These channels also result in ice surface deformation, which diverts supraglacial rivers into the transverse fractures. We report direct evidence that a major 2016 calving event at Nansen Ice Shelf in the Ross Sea was the result of fracture driven by such channelized thinning and demonstrate that similar basal channel-driven transverse fractures occur elsewhere in Greenland and Antarctica. In the event of increased basal and surface melt resulting from rising ocean and air temperatures, ice shelves will become increasingly vulnerable to these tandem effects of basal channel destabilization.
URI
http://repository.kopri.re.kr/handle/201206/9464
DOI
http://dx.doi.org/10.1126/sciadv.aao7212
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse