Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet
International audience Over a year of seismic observations, ∼5000 short duration icequakes were detected by a permanent broadband station installed at the Princess Elisabeth base, located ∼180 km inland in eastern Dronning Maud Land, East-Antarctica. Icequake detection via seismic waveform pattern r...
Published in: | Annals of Glaciology |
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Online Access: | https://hal.science/hal-02289922 https://hal.science/hal-02289922/document https://hal.science/hal-02289922/file/Lombardi_thermally_induced_icequakes_Ann_Glacio_2019.pdf https://doi.org/10.1017/aog.2019.26 |
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ftunivnantes:oai:HAL:hal-02289922v1 2023-05-15T13:29:17+02:00 Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet Lombardi, Denis Gorodetskaya, Irina, Barruol, Guilhem Camelbeeck, Thierry Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre for Environmental and Marine Studies (CESAM), Department of Environment and Planning, University of Aveiro Royal Observatory of Belgium Brussels (ROB) 2019-09 https://hal.science/hal-02289922 https://hal.science/hal-02289922/document https://hal.science/hal-02289922/file/Lombardi_thermally_induced_icequakes_Ann_Glacio_2019.pdf https://doi.org/10.1017/aog.2019.26 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.1017/aog.2019.26 hal-02289922 https://hal.science/hal-02289922 https://hal.science/hal-02289922/document https://hal.science/hal-02289922/file/Lombardi_thermally_induced_icequakes_Ann_Glacio_2019.pdf doi:10.1017/aog.2019.26 info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-02289922 Annals of Glaciology, 2019, 60 (79), pp.45-56. ⟨10.1017/aog.2019.26⟩ Antarctic glaciology blue ice ice rheology ice temperature seismology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.1017/aog.2019.26 2023-02-01T00:54:03Z International audience Over a year of seismic observations, ∼5000 short duration icequakes were detected by a permanent broadband station installed at the Princess Elisabeth base, located ∼180 km inland in eastern Dronning Maud Land, East-Antarctica. Icequake detection via seismic waveform pattern recognition indicates the presence of two dominating clusters of events, totalizing ∼1500 icequakes. The corresponding icequake locations point towards two distinct zones of outcropping blue ice areas (BIAs) located respectively at 4 and 1 km from the seismic station, both on the leeward side of a nunatak protruding through the ice sheet. The temporal occurrence of these icequakes suggests a close genetic link with thermal contraction of ice caused by significant surface cooling controlled, in summer by variations in diurnal solar radiation and in winter by strong cooling during cold katabatic regimes. Further analysis demonstrates the dependence of these icequakes on the absolute surface temperature and on its temporal change. Besides providing information on the ice fracture mechanics and rheology, investigations of thermal icequakes may be regarded as a ground-based proxy for the monitoring of the thermal state of BIAs, and characterization of ice-sheet ablation zones. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Université de Nantes: HAL-UNIV-NANTES Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Princess Elisabeth Base ENVELOPE(23.200,23.200,-71.570,-71.570) Annals of Glaciology 60 79 45 56 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctic glaciology blue ice ice rheology ice temperature seismology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Antarctic glaciology blue ice ice rheology ice temperature seismology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Lombardi, Denis Gorodetskaya, Irina, Barruol, Guilhem Camelbeeck, Thierry Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
topic_facet |
Antarctic glaciology blue ice ice rheology ice temperature seismology [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience Over a year of seismic observations, ∼5000 short duration icequakes were detected by a permanent broadband station installed at the Princess Elisabeth base, located ∼180 km inland in eastern Dronning Maud Land, East-Antarctica. Icequake detection via seismic waveform pattern recognition indicates the presence of two dominating clusters of events, totalizing ∼1500 icequakes. The corresponding icequake locations point towards two distinct zones of outcropping blue ice areas (BIAs) located respectively at 4 and 1 km from the seismic station, both on the leeward side of a nunatak protruding through the ice sheet. The temporal occurrence of these icequakes suggests a close genetic link with thermal contraction of ice caused by significant surface cooling controlled, in summer by variations in diurnal solar radiation and in winter by strong cooling during cold katabatic regimes. Further analysis demonstrates the dependence of these icequakes on the absolute surface temperature and on its temporal change. Besides providing information on the ice fracture mechanics and rheology, investigations of thermal icequakes may be regarded as a ground-based proxy for the monitoring of the thermal state of BIAs, and characterization of ice-sheet ablation zones. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Centre for Environmental and Marine Studies (CESAM), Department of Environment and Planning, University of Aveiro Royal Observatory of Belgium Brussels (ROB) |
format |
Article in Journal/Newspaper |
author |
Lombardi, Denis Gorodetskaya, Irina, Barruol, Guilhem Camelbeeck, Thierry |
author_facet |
Lombardi, Denis Gorodetskaya, Irina, Barruol, Guilhem Camelbeeck, Thierry |
author_sort |
Lombardi, Denis |
title |
Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
title_short |
Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
title_full |
Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
title_fullStr |
Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
title_full_unstemmed |
Thermally induced icequakes detected on blue ice areas of the East Antarctic ice sheet |
title_sort |
thermally induced icequakes detected on blue ice areas of the east antarctic ice sheet |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02289922 https://hal.science/hal-02289922/document https://hal.science/hal-02289922/file/Lombardi_thermally_induced_icequakes_Ann_Glacio_2019.pdf https://doi.org/10.1017/aog.2019.26 |
long_lat |
ENVELOPE(23.200,23.200,-71.570,-71.570) |
geographic |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Princess Elisabeth Base |
geographic_facet |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Princess Elisabeth Base |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-02289922 Annals of Glaciology, 2019, 60 (79), pp.45-56. ⟨10.1017/aog.2019.26⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/aog.2019.26 hal-02289922 https://hal.science/hal-02289922 https://hal.science/hal-02289922/document https://hal.science/hal-02289922/file/Lombardi_thermally_induced_icequakes_Ann_Glacio_2019.pdf doi:10.1017/aog.2019.26 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1017/aog.2019.26 |
container_title |
Annals of Glaciology |
container_volume |
60 |
container_issue |
79 |
container_start_page |
45 |
op_container_end_page |
56 |
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1765999692084150272 |