Monitoring volcanic thermal anomalies from space: Size matters
International audience Measuring temperatures on volcanoes from space provides important constraints on the transfer of mass and heat to the Earth's surface. Time series of multispectral infrared images, acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) betw...
Published in: | Journal of Volcanology and Geothermal Research |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420/document https://hal-insu.archives-ouvertes.fr/insu-00587420/file/Murphy-JVGR-2011.pdf https://doi.org/10.1016/j.jvolgeores.2011.04.008 |
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ftunivnantes:oai:HAL:insu-00587420v1 2023-05-15T13:31:27+02:00 Monitoring volcanic thermal anomalies from space: Size matters Murphy, Samuel William de Souza Flilho, Carlos Roberto Oppenheimer, Clive Department of Geology and Natural Resources Universidade Estadual de Campinas = University of Campinas (UNICAMP) Department of Geography Cambridge, UK University of Cambridge UK (CAM) Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) 2011 https://hal-insu.archives-ouvertes.fr/insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420/document https://hal-insu.archives-ouvertes.fr/insu-00587420/file/Murphy-JVGR-2011.pdf https://doi.org/10.1016/j.jvolgeores.2011.04.008 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2011.04.008 insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420/document https://hal-insu.archives-ouvertes.fr/insu-00587420/file/Murphy-JVGR-2011.pdf doi:10.1016/j.jvolgeores.2011.04.008 info:eu-repo/semantics/OpenAccess ISSN: 0377-0273 Journal of Volcanology and Geothermal Research https://hal-insu.archives-ouvertes.fr/insu-00587420 Journal of Volcanology and Geothermal Research, Elsevier, 2011, 203 (1-2), pp.48-61. ⟨10.1016/j.jvolgeores.2011.04.008⟩ volcano monitoring ASTER Láscar Erebus [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2011 ftunivnantes https://doi.org/10.1016/j.jvolgeores.2011.04.008 2022-08-09T23:13:29Z International audience Measuring temperatures on volcanoes from space provides important constraints on the transfer of mass and heat to the Earth's surface. Time series of multispectral infrared images, acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) between 2000 and 2009, were inspected to investigate fluctuations in thermal anomalies at both Mount Erebus (Antarctica) and Láscar volcano (Chile). Several thermal metrics were explored: i) maximum pixel temperatures above background, ii) the spatial extent of low, moderate and high temperature anomalies, and iii) the spatial extent of short-wave infrared anomalies. The maximum pixel temperature metric correlated to eruptive events at Láscar volcano yet displayed significant scatter at Erebus. The spatial extent of both temperature and short-wave infrared anomalies correlates well with eruptive activity at both volcanoes. Limited variation in the size of thermal anomalies was observed at Erebus throughout the time series due to the stability of a long-lived lava lake, with the exception of a seasonal expansion in low temperature anomalies associated with localized snow-melt at the peak. This finding has implications for the interpretation of low temperature anomalies at other volcanoes. At least two different types of precursory signals are identified at Láscar: i) a gradual increase and ii) a dip, in the size and intensity of thermal anomalies. These thermal precursors appear to be associated with different eruptive styles. The former precedes a relatively shallow, short lived eruption; the later a prolonged eruptive period. Such thermal precursors could therefore help to constrain not only the timing but also the style and duration of an imminent eruptive episode. Article in Journal/Newspaper Antarc* Antarctica Université de Nantes: HAL-UNIV-NANTES Lava Lake ENVELOPE(-128.996,-128.996,55.046,55.046) Mount Erebus ENVELOPE(167.167,167.167,-77.533,-77.533) Journal of Volcanology and Geothermal Research 203 1-2 48 61 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
volcano monitoring ASTER Láscar Erebus [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
volcano monitoring ASTER Láscar Erebus [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDE.MCG]Environmental Sciences/Global Changes Murphy, Samuel William de Souza Flilho, Carlos Roberto Oppenheimer, Clive Monitoring volcanic thermal anomalies from space: Size matters |
topic_facet |
volcano monitoring ASTER Láscar Erebus [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Measuring temperatures on volcanoes from space provides important constraints on the transfer of mass and heat to the Earth's surface. Time series of multispectral infrared images, acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) between 2000 and 2009, were inspected to investigate fluctuations in thermal anomalies at both Mount Erebus (Antarctica) and Láscar volcano (Chile). Several thermal metrics were explored: i) maximum pixel temperatures above background, ii) the spatial extent of low, moderate and high temperature anomalies, and iii) the spatial extent of short-wave infrared anomalies. The maximum pixel temperature metric correlated to eruptive events at Láscar volcano yet displayed significant scatter at Erebus. The spatial extent of both temperature and short-wave infrared anomalies correlates well with eruptive activity at both volcanoes. Limited variation in the size of thermal anomalies was observed at Erebus throughout the time series due to the stability of a long-lived lava lake, with the exception of a seasonal expansion in low temperature anomalies associated with localized snow-melt at the peak. This finding has implications for the interpretation of low temperature anomalies at other volcanoes. At least two different types of precursory signals are identified at Láscar: i) a gradual increase and ii) a dip, in the size and intensity of thermal anomalies. These thermal precursors appear to be associated with different eruptive styles. The former precedes a relatively shallow, short lived eruption; the later a prolonged eruptive period. Such thermal precursors could therefore help to constrain not only the timing but also the style and duration of an imminent eruptive episode. |
author2 |
Department of Geology and Natural Resources Universidade Estadual de Campinas = University of Campinas (UNICAMP) Department of Geography Cambridge, UK University of Cambridge UK (CAM) Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Murphy, Samuel William de Souza Flilho, Carlos Roberto Oppenheimer, Clive |
author_facet |
Murphy, Samuel William de Souza Flilho, Carlos Roberto Oppenheimer, Clive |
author_sort |
Murphy, Samuel William |
title |
Monitoring volcanic thermal anomalies from space: Size matters |
title_short |
Monitoring volcanic thermal anomalies from space: Size matters |
title_full |
Monitoring volcanic thermal anomalies from space: Size matters |
title_fullStr |
Monitoring volcanic thermal anomalies from space: Size matters |
title_full_unstemmed |
Monitoring volcanic thermal anomalies from space: Size matters |
title_sort |
monitoring volcanic thermal anomalies from space: size matters |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420/document https://hal-insu.archives-ouvertes.fr/insu-00587420/file/Murphy-JVGR-2011.pdf https://doi.org/10.1016/j.jvolgeores.2011.04.008 |
long_lat |
ENVELOPE(-128.996,-128.996,55.046,55.046) ENVELOPE(167.167,167.167,-77.533,-77.533) |
geographic |
Lava Lake Mount Erebus |
geographic_facet |
Lava Lake Mount Erebus |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
ISSN: 0377-0273 Journal of Volcanology and Geothermal Research https://hal-insu.archives-ouvertes.fr/insu-00587420 Journal of Volcanology and Geothermal Research, Elsevier, 2011, 203 (1-2), pp.48-61. ⟨10.1016/j.jvolgeores.2011.04.008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2011.04.008 insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420 https://hal-insu.archives-ouvertes.fr/insu-00587420/document https://hal-insu.archives-ouvertes.fr/insu-00587420/file/Murphy-JVGR-2011.pdf doi:10.1016/j.jvolgeores.2011.04.008 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2011.04.008 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
203 |
container_issue |
1-2 |
container_start_page |
48 |
op_container_end_page |
61 |
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1766018213290704896 |