Document of bibliographic reference 395643

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days

Abstract

Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland. In this study, we demonstrate how this event started with a glacial thinning–induced rock-ice avalanche of 25 × 10⁶ cubic meters plunging into Dickson Fjord, triggering a 200-meter-high tsunami. Simulations show that the tsunami stabilized into a 7-meter-high long-duration seiche with a frequency (11.45 millihertz) and slow amplitude decay that were nearly identical to the seismic signal. An oscillating, fjord-transverse single force with a maximum amplitude of 5 × 10¹¹ newtons reproduced the seismic amplitudes and their radiation pattern relative to the fjord, demonstrating how a seiche directly caused the 9-day-long seismic signal. Our findings highlight how climate change is causing cascading, hazardous feedbacks between the cryosphere, hydrosphere, and lithosphere.

Bibliographic citation

Svennevig, Kristian; Hicks, Stephen P.; Forbriger, Thomas; Lecocq, Thomas; Widmer-Schnidrig, Rudolf; Mangeney, Anne; Hibert, Clément; Korsgaard, Niels J.; Lucas, Antoine; Satriano, Claudio; Anthony, Robert E.; Mordret, Aurélien; Schippkus, Sven; Rysgaard, Søren; Boone, Wieter; Gibbons, Steven J.; Cook, Kristen L.; Glimsdal, Sylfest; Løvholt, Finn; Van Noten, Koen; Assink, Jelle D.; Marboeuf, Alexis; Lomax, Anthony; Vanneste, Kris; Taira, Taka’aki; Spagnolo, Matteo; De Plaen, Raphael; Koelemeijer, Paula; Ebeling, Carl; Cannata, Andrea; Harcourt, William D.; Cornwell, David G.; Caudron, Corentin; Poli, Piero; Bernard, Pascal; Larose, Eric; Stutzmann, Eleonore; Voss, Peter H.; Lund, Bjorn; Cannavo, Flavio; Castro-Díaz, Manuel J.; Chaves, Esteban; Dahl-Jensen, Trine; Pinho Dias, Nicolas De; Déprez, Aline; Develter, Roeland; Dreger, Douglas; Evers, Läslo G.; Fernández-Nieto, Enrique D.; Ferreira, Ana M. G.; Funning, Gareth; Gabriel, Alice-Agnes; Hendrickx, Marc; Kafka, Alan L.; Keiding, Marie; Kerby, Jeffrey; Khan, Shfaqat A.; Dideriksen, Andreas Kjær; Lamb, Oliver D.; Larsen, Tine B.; Lipovsky, Bradley; Magdalena, Ikha; Malet, Jean-Philippe; Myrup, Mikkel; Rivera, Luis; Ruiz-Castillo, Eugenio; Wetter, Selina; Wirtz, Bastien (2024). A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days. Science (Wash.) 385(6714): 1196-1205. https://dx.doi.org/10.1126/science.adm9247

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true