Mon Oct 13, F. Flechtner
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Danesi, Stefania, Salimbeni, Simone, Borghi, Alessandra, Urbini, Stefano, Zirizzotti, Achille, and Frezzotti, Massimo, 2025. Ice mass discharge through the Antarctic subglacial hydrographic network as a trigger for cryoseismicity. Journal of Glaciology, 71:e89, doi:10.1017/jog.2025.10062.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025JGlac..71E..89D,
author = {{Danesi}, Stefania and {Salimbeni}, Simone and {Borghi}, Alessandra and {Urbini}, Stefano and {Zirizzotti}, Achille and {Frezzotti}, Massimo},
title = "{Ice mass discharge through the Antarctic subglacial hydrographic network as a trigger for cryoseismicity}",
journal = {Journal of Glaciology},
year = 2025,
month = jan,
volume = {71},
eid = {e89},
pages = {e89},
abstract = "{We analyse seismic time series collected during experimental campaigns
in the area of the David Glacier, Victoria Land, Antarctica,
between 2003 and 2016. We observe hundreds of repeating seismic
events, characterized by highly correlated waveforms (cross-
correlation > 0.95), which mainly occur in the grounding zone,
i.e. the region where the ice transitions from grounded ice
sheet to freely floating ice shelf. The joint analysis of
seismic events and observed local tidal measurements suggests
that seismicity is not only triggered by a regular, periodic
driver such as the ocean tides but also more likely by transient
pulses. We consider potential environmental processes and their
impact on the coupling between the glacier flow and the bedrock
brittle failure. Among the environmental variables examined, our
findings suggest that clustered and repeated seismic events may
be related to transient episodes of ice-mass discharge
correlated to a change in the subglacial hydrographic system
that originates upstream of the glacier, lubricating the
interface with the bedrock. This hypothesis is supported by the
gravity variation observations provided by the GRACE satellite
mission, which observed mass variations during periods
characterized by seismic clustering.}",
doi = {10.1017/jog.2025.10062},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025JGlac..71E..89D},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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