DOI: 10.1002/2013GL057814
论文题名: Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica
作者: Barruol G. ; Cordier E. ; Bascou J. ; Fontaine F.R. ; Legrésy B. ; Lescarmontier L.
刊名: Geophysical Research Letters
ISSN: 0094-8468
EISSN: 1944-8199
出版年: 2013
卷: 40, 期: 20 起始页码: 5412
结束页码: 5416
语种: 英语
英文关键词: Adélie land
; Antarctica
; cryoseismology
; icequakes
; Mertz glacier
; tide
Scopus关键词: Antarctica
; cryoseismology
; East antarctica
; Glacier dynamics
; icequakes
; Sealevel change
; Seismic networks
; Tidal modulation
; Modulation
; Patient monitoring
; Sea level
; Seismology
; Tides
; Seismic waves
; flexure
; glacier dynamics
; grounding line
; ice
; outcrop
; outflow
; sea level change
; seismograph
; tidal cycle
; tide
; Antarctica
; East Antarctica
; Mertz Glacier
英文摘要: The 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. Key Points Large microseismicity is recorded at the Mertz glacier grounding area Icequakes show clear evidence of tide modulation Ice fracturing is proposed to be largely controlled by glacier flexure ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886915470&doi=10.1002%2f2013GL057814&partnerID=40&md5=29470d3894087c3f8999b7c0be9395c3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5732
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire GéoSciences Réunion, Université de la Réunion, Université Paris Diderot, 97744 Saint Denis, France
Recommended Citation:
Barruol G.,Cordier E.,Bascou J.,et al. Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica[J]. Geophysical Research Letters,2013-01-01,40(20).