Climate-controlled submarine landslides on the Antarctic continental margin
-
Title
- Climate-controlled submarine landslides on the Antarctic continental margin
-
Author(s)
- Gales, Jenny; McKay, Robert; De Santis, Laura; Rebesco, Michele; Laberg, Jan Sverre; Shevenell, Amelia; Harwood, David; Leckie, Mark; Kulhanek, Denise; Patterson, Molly; Lucchi, Renata; Kim, Sookwan; Dodd, Justin; Seidenstein, Julia; IODP Expedition 374 Scientists
- KIOST Author(s)
- Kim, Sookwan(김수관)
-
Alternative Author(s)
- 김수관
-
Publication Year
- 2023-09-11
-
Abstract
- Antarctica’s continental margins pose an unknown submarine landslide-generated tsunami risk
to the Southern Hemisphere populations and infrastructure. Understanding the factors driving
slope failure is essential to assessing future geohazards. Here, we present a multidisciplinary
study of a major submarine landslide complex along the eastern Ross Sea continental slope
(Antarctica) that identifies preconditioning factors and failure mechanisms. Weak layers,
identified beneath three submarine landslides, consist of distinct packages of interbedded
Miocene- to Pliocene-age diatom oozes and glaciomarine diamicts. The observed lithological
differences, which arise from glacial to interglacial variations in biological productivity, ice
proximity and ocean circulation, caused changes in sediment deposition that inherently
preconditioned slope failure. These recurrent Antarctic submarine landslides were likely
triggered by seismicity associated with glacioisostatic readjustment, leading to failure within
the preconditioned weak layers. Ongoing climate warming and ice retreat may increase
regional glacioisostatic seismicity, triggering Antarctic submarine landslides.
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/44810
-
Bibliographic Citation
- INSTANT Conference 2023, 2023
-
Publisher
- Scientific Committee on Antarctic Research (SCAR)
-
Type
- Conference
-
Language
- English
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.