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Bathymetric controls on calving processes at Pine Island Glacier

Arndt, Jan Erik and Larter, Robert D. and Friedl, Peter and Gohl, Karsten and Höppner, Kathrin and Science Team, of Expedition PS104 (2018) Bathymetric controls on calving processes at Pine Island Glacier. The Cryosphere, 12, pp. 2039-2050. Copernicus Publications. DOI: 10.5194/tc-12-2039-2018 ISSN 1994-0416

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Official URL: http://www.the-cryosphere.net/12/2039/2018/

Abstract

Pine Island Glacier is the largest current Antarctic contributor to sea-level rise. Its ice loss has substantially increased over the last 25 years through thinning, acceleration and grounding line retreat. However, the calving line positions of the stabilising ice shelf did not show any trend within the observational record (last 70 years) until calving in 2015 led to unprecedented retreat and changed the alignment of the calving front. Bathymetric surveying revealed a ridge below the former ice shelf and two shallower highs to the north. Satellite imagery shows that ice contact on the ridge was likely lost in 2006 but was followed by intermittent contact resulting in back stress fluctuations on the ice shelf. Continuing ice-shelf flow also led to occasional ice-shelf contact with the northern bathymetric highs, which initiated rift formation that led to calving. The observations show that bathymetry is an important factor in initiating calving events.

Item URL in elib:https://elib.dlr.de/120589/
Document Type:Article
Title:Bathymetric controls on calving processes at Pine Island Glacier
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Arndt, Jan ErikAlfred-Wegener-InstitutUNSPECIFIED
Larter, Robert D.British Antarctic SurveyUNSPECIFIED
Friedl, Peterpeter.friedl (at) fau.deUNSPECIFIED
Gohl, KarstenAlfred-Wegener-InstitutUNSPECIFIED
Höppner, Kathrinkathrin.hoeppner (at) dlr.deUNSPECIFIED
Science Team, of Expedition PS104UNSPECIFIEDUNSPECIFIED
Date:15 June 2018
Journal or Publication Title:The Cryosphere
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12
DOI :10.5194/tc-12-2039-2018
Page Range:pp. 2039-2050
Publisher:Copernicus Publications
ISSN:1994-0416
Status:Published
Keywords:Antarctica, Pine Island Glacier, Bathymetry, Satellite SAR data
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Remote sensing and geoscience
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Höppner, Dr. Kathrin
Deposited On:11 Jul 2018 09:34
Last Modified:09 Jan 2019 12:23

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