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Climate-controlled submarine landslides on the Antarctic continental margin

Earth Sciences

Climate-controlled submarine landslides on the Antarctic continental margin

J. A. Gales, R. M. Mckay, et al.

This groundbreaking research delves into the enigmatic submarine landslide risks along Antarctica's continental margins, revealing crucial preconditioning factors and mechanisms behind their occurrence. Conducted by a team of esteemed scientists, this study highlights how climate change might escalate seismic activity, paving the way for future landslides.

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Playback language: English
Abstract
Antarctica's continental margins pose an unknown submarine landslide-generated tsunami risk. This study investigates a major submarine landslide complex along the eastern Ross Sea continental slope, identifying preconditioning factors and failure mechanisms. Weak layers beneath the landslides consist of Miocene- to Pliocene-age diatom oozes and glaciomarine diamicts. Lithological differences, driven by glacial-interglacial variations, preconditioned slope failure. These landslides were likely triggered by seismicity from glacioisostatic readjustment. Ongoing climate warming and ice retreat may increase seismicity, triggering future landslides.
Publisher
Nature Communications
Published On
May 18, 2023
Authors
Jenny A. Gales, Robert M. McKay, Laura De Santis, Michele Rebesco, Jan Sverre Laberg, Amelia E Shevenell, David Harwood, R. Mark Leckie, Denise K. Kulhanek, Maxine King, Molly Patterson, Renata G. Lucchi, Sookwan Kim, Sunghan Kim, Justin Dodd, Julia Seidenstein, Catherine Prunella, Giulia M. Ferrante, IODP Expedition 374 Scientists
Tags
Antarctica
submarine landslides
tsunami risk
seismicity
climate warming
glacial retreat
Ross Sea

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