Data/hora: 14/06/2024 20:46:53

Provedor de dados: | 5
País: | France
Título: | Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica
Autores: | Barruol, Guilhem; Cordier, Emmanuel; Bascou, Jerome; Fontaine, Fabrice R.; Legresy, Benoit; Lescarmontier, Lydie.
Data: | 2013-10
Ano: | 2013
Palavras-chave: | Icequakes; Mertz glacier; Tide; Antarctica; Cryoseismology; Adélie land.
Resumo: | The deployment of a seismic network along the Adelie and George V coasts in East Antarctica during the period 2009-2012 provides the opportunity to monitor cryoseismic activity and to obtain new insights on the relationship between tidal cycles and coastal glacier dynamics. Here we focus on records from a seismometer located on a rocky outcrop in the vicinity of the grounding line of the 35 km broad Mertz glacier, a major outflow of this region. We detect numerous icequakes (50,000 events within 10 months and up to 100 events/h) and demonstrate their clear tidal modulation. We suggest that they result from ice friction and fracturing around the rocky peak and from the glacier flexure in response to the falling and rising tides at its grounding area. We propose that such icequake monitoring could be used as a climate proxy since grounding lines are subject to migrate with sea level changes.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00244/35567/34098.pdf

DOI:10.1002/2013GL057814

https://archimer.ifremer.fr/doc/00244/35567/

Editor: | Amer Geophysical Union
Formato: | application/pdf
Fonte: | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2013-10 , Vol. 40 , N. 20 , P. 5412-5416

Fonte:

2013. American Geophysical Union. All Rights Reserved.

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