Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica. Barruol, G.; Cordier, E.; Bascou, J.; Fontaine, F. R.; Legrésy, B.; and Lescarmontier, L. 40(20):5412–5416. Number: 20
Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica [link]Paper  doi  abstract   bibtex   
AbstractThe deployment of a seismic network along the Adélie 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.
@article{barruol_tide-induced_2013,
	title = {Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica},
	volume = {40},
	rights = {©2013. American Geophysical Union. All Rights Reserved.},
	issn = {1944-8007},
	url = {http://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2013GL057814},
	doi = {10.1002/2013GL057814},
	abstract = {{AbstractThe} deployment of a seismic network along the Adélie 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.},
	pages = {5412--5416},
	number = {20},
	journaltitle = {Geophysical Research Letters},
	author = {Barruol, Guilhem and Cordier, Emmanuel and Bascou, Jérôme and Fontaine, Fabrice R. and Legrésy, Benoit and Lescarmontier, Lydie},
	urldate = {2020-01-27},
	date = {2013},
	langid = {english},
	note = {Number: 20},
	keywords = {Antarctica, Adélie land, cryoseismology, icequakes, Mertz glacier, tide}
}
Downloads: 0