Brief communication: Rapid acceleration of the Brunt Ice Shelf after calving of iceberg A-81

The Brunt Ice Shelf, Antarctica, accelerated rapidly from a velocity of 900 to 1500 m a−1 during 6 months, following calving of a 1500 km2 iceberg on 22 January 2023. The immediate response to calving was observed as a change to the rate of acceleration and not to velocity directly. Acceleration inc...

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Veröffentlicht in:The cryosphere Jg. 18; H. 2; S. 705 - 710
Hauptverfasser: Marsh, Oliver J., Luckman, Adrian J., Hodgson, Dominic A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Katlenburg-Lindau Copernicus GmbH 13.02.2024
Copernicus Publications
Schlagworte:
Acceleration
Buttresses
Communication
Ice calving
Ice shelves
Icebergs
Land ice
Research centers
Software
Velocity
ISSN:1994-0424, 1994-0416, 1994-0424, 1994-0416
Online-Zugang:Volltext
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Zusammenfassung:The Brunt Ice Shelf, Antarctica, accelerated rapidly from a velocity of 900 to 1500 m a−1 during 6 months, following calving of a 1500 km2 iceberg on 22 January 2023. The immediate response to calving was observed as a change to the rate of acceleration and not to velocity directly. Acceleration increased by a factor of 10, with a second, smaller calving at the end of June 2023, leading to further tripling of acceleration. The acceleration was caused by the reduction of buttressing at the McDonald Ice Rumples, leading to high localised strain rates, which reduce the strength of the remaining ice shelf.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-18-705-2024